Audi S4 3.0TFSI - Engine Failure, but why? What happened?

[@wes8398]

I've only recently been directed to your content, and as a 3.0t enthusiast, I have to say THANK YOU. You do an AWESOME job of sharing your knowledge. This stuff is truly GOLD for a guy like me who likes to turn his own wrenches and be accountable for every bolt or part touched. Too many shops just don't care these days.

[@VAGTechnic]

Thank you for your nice comment!

[@mackfar27]

I absolutely love these videos. I don’t own an Audi, but the level of pride and craftsmanship that is put into all of the repair work done on these vehicles is amazing and shouldn’t go un-notice.

[@Alcalfa]

Just a small note, even though this vid is older now: piston 'slap' in english refers to the noise when a piston is loose in the cylinder bore and is slapping the sides of the cylinder. Hitting the cylinder head isn't something you'd call piston slap. Great job!

[@Draxindustries1]

The work done by VAG Technic is superb. All the work done is tested out on the roads to make sure the customer has his car back in top condition..

[@extrememike]

Fun to see an engine like this being torn apart. I can definitely tell that you all are well experienced. One thing I didn't understand was that if the cause of failure was the catalytic converter, which in turn led to higher exhaust temperatures, aren't there fail safe mechanism programed in the ECU to limit the engine or at least provide diagnostic trouble codes (engine light) ??? or did the owner just didn't care about understanding what was happening?

[@VAGTechnic]

Sometimes you get warning , sometimes no . Most common is cylinder disabling , but people are changing spark plugs and coil packs instead of looking elsewhere

[@om0]

@@VAGTechnic I had the Check Engine Light on yesterday for bank 1 CAT, but after hooning it for about 20mins the CEL disappeared and after a scan the ECU was error free. Do you think that this might be an early sign of failing CATs?

[@brad146]

I had this engine in an A6. Best engine and drive I've had so far. I started to get the limp mode and every time I scanned it, it was a different cylinder miss fire but always on the same bank. I was also loosing power. I tried everything to fix. In the end it was the cat that was blocked. The cat eventually cleared, literally all of it. shortly afterwards the engine completely seized on me and I had to get rid.

[@dagnut]

@@brad146 I have the same car now. From what I've been gathering the biggest restrictions on the car are the cats on the down pipes. Anyone in North America who is going stage 2 is putting in new down pipes

[@dagnut]

@@brad146 and the failure is the worry for me also...at least if you put money into an S4 it will hold decent value as a prestige car...the A6 won't

[@1981Karlik]

I wish to have master mechanics like you here in US. Woow it's pleasure to watch your craftsmanship! Thanks for video.

[@julesviolin]

Top top work! You guys obviously know what you are doing and have a very clean hi tech workshop. Worth paying extra for quality work which won't bounce on you! You'll always be very busy via word of mouth etc. That's how we survive too 👍✅ One thing is apparent though.......a lot of big engined Audis ain't for the DIY fraternity.

[@richardmessenger9474]

Great channel...started my apprenticeship when I was 15 in 1968 in heavy earthmoving plant repair...since then I have repaired anything with an engine...can't believe the size of that engine when it's got all its running gear on it...was watching one blog where the engine had to be removed to renew the starter......😆😆..even after all these years I still love finding out why something has failed and then fix it..

[@PropanePete]

Sorry guys but the video techniques, rapid zoom in and out, etc, are a bit hard to watch and detract from what otherwise is a very informative video.

[@stephenmcqueen4029]

Not to mention the terrible music. We do have attention spans

[@jonsimpson3011]

Totally agree , keep it simple

[@markcarter9476]

With reference to the catalytic converters breaking up. With the V12 engine used in the Aston Martin DB9 and other Astons of that era, the catalytic converters close to the exhaust headers can start to disintegrate and potentially be injested back into the engine. Obviously not a good thing, and something owners are aware of and always on the look out to prevent. The cause? Misfires due to failing coil packs sending unburnt fuel down the exhaust. The unburnt fuel then settles on the catalyst and burns, damaging the catalyst material and causing it to break up. It seems to me a simple solution would be to position the initial catalyst further away from the exhaust header, though there is probably a good reason why this is not done.

[@onecookieboy]

The closer to the source of heat (combustion chamber) the quicker the converter gets up to temperature and starts working, it's all about emissions.

[@jdmjesus6103]

Pre cats are not a legal requirement in the UK, you can remove them and still pass the MOT test, though they should still 'look' like they are fitted... Also, it's not the heat from the fuel burning that kills them, cats are designed to work hot. It's the shocks from the explosions in the exhaust from the unburnt fuel that shatter them. Or they just block up, which is much more common. In that case, more heat would actually help by burning off the carbon.

[@khaledhaggali102]

Top notch work, all the respect from a fellow euro tech in Toronto 💪👌

[@VAGTechnic]

Thank you.

[@floridahummer]

i could watch engine rebuilds all day, good work guys.

[@saalderink]

Excellent! Great content, great editing and production quality…. You are the complete package. Thoroughly enjoy you videos… your attitude and personality really shine. Kudos!

[@petrik25]

If i can ask, what was a cost of putting that car back on the road?

[@rogerbarrett9920]

Great job - what a disaster caused by such a simple fault.

[@nickayivor8432]

👌 Very KNOWLEDGEABLE Thanks 👍 From Nick Ayivor from London England UK 🇬🇧

[@fredzimmer8626]

The location of the secondary O2 is most definitely not why this engine has a habit of destroying cats. It's the high likelihood the the face of the substrate to become fouled by coolant and or oil from either a bad PCV or leaking IC which looks to be the case of this failure. Also the close proximity to the manifold and the high EGTs these engines run once tuned also takes its toll.

[@VAGTechnic]

No coolant missing or mixed coolant with oil …

[@fredzimmer8626]

@@VAGTechnic In the video you can see the face of the matrix is clogged up. Someone may have been topping off the coolant. As far as coolant in the oil I'm not sure why that would prove anything. A bad PCV doesn't mean there has to be coolant in the oil.

[@wes8398]

@Fred - Bang on, sir!!

[@tehgzizlauw1787]

Yup! Not even necessarily a bad PCV, it probably just burns oil like every German car and surely enough the cats will clog up at some point

[@jasonnicholas3722]

Been a long time since Audi fitted a reliable engine worthy of their reputation.

[@andreweverett6845]

It’s the same with all German cars now - over complicated unreliable junk. Audi VW is especially bad.

[@isaachunt5799]

@@andreweverett6845 yep. i wouldn't have one if u gave me it. i'll stick with my pushrod motor chevy camaro.. seen so many audi videos with the motor blown. UTTER FUCKING JUNK all of them

[@riccccccardo]

I had two 2.0tfsi mk7 a4 engines go on me cost me thousands to fix 😪

[@isaachunt5799]

@@riccccccardo listen to scotty kilmer ffs. avoid this over engineered shite and just buy any old cheap car.

[@riccccccardo]

@@isaachunt5799 I now own a Japanese Lexus 450h GS 😍

[@peterjames6607]

Another v6 lives to see another day! Great video, as always, and great editing too :)

[@VAGTechnic]

Thank you. :)

[@wes8398]

@@VAGTechnic Can I bother you to ask what brand catalyst you went with for replacement? And why you chose to keep them in the OEM location rather than relocating them downstream? Downstream GESi or HJS cats in the "midpipes" are the go-to option here in N. America when the owner wants to keep cats rather than just delete them with "test pipes".

[@GRfourfun]

Got a Lexus ISF and you just don’t get content like this on other channels…ever, so subscribed for unreliable content 👍🏻

[@markkauffman6184]

As you have well experienced I’m sure, you won’t see repair channels like this on a Lexus. They just don’t break.

[@gbw28]

Enjoy trouble free motoring in your wonderful Lexus.

[@GRfourfun]

@@gbw28 Thank you

[@WOGlasgow]

Great Video buddy keep up the good work , but can you do me a favour stick a battery in that smoke alarm its annoying as hell.

[@snakkedr]

This video hits with me because my A6 is getting an engine swap next week. It had the same knock as in the beginning of the video. 😕

[@renatocardoso5791]

Vcs são Brabo!!! Profissionais top demais vou aprender a língua inglesa só por causa de vcs kk pra entender todas as explicações que vcs dão.parabéns vcs são tops

[@Greggspies]

Wouldn't go near this engine personally but tip my hat your on your game

[@billymania11]

You do quality work, but I do not like V6 engines. I think they are too much of a compromise in terms of engineering. I prefer the straight six design as exemplified by BMW. Having said that, you provide a valuable service in keeping the Audi's on the road.

[@grahamek86]

This engine has a far better track record for reliability compared to the N54 and N55 engines.

[@billymania11]

@@grahamek86 If you say so.

[@grahamek86]

@@billymania11 I do. My whole business is based on tuning European vehicles. You could say I've got some insight ...

[@billymania11]

@@grahamek86 I know you're right. I hate to admit that BMW engines are unreliable. I run an N55 but it's the special variant in the M2. I hope I avoid the common issues. Anyway I enjoy watching your videos.

[@grahamek86]

@Capt Hook Ahh, anecdotal evidence. Thanks for that. I'll throw my near 20 years experience tuning European vehicles in the bin since you've had a car that's been OK.

[@XPGlowWorm]

Interesting to see what it takes to repair such engine. Video hard to watch due loud soundtrack.

[@bayareaartist999]

There was no repair. The old one was thrown away and the used one was refreshed and installed.

[@mitchells2371]

Can you make a video on pulling the engine out. Thanks for sharing the information on the 3.0t platform!

[@VAGTechnic]

Hi, We have 2 outside waiting might do one of them as manual for engine removal .

[@mitchells2371]

@@VAGTechnic Just did carbon cleaning in my garage but wanting to tackle catalytic converters and timing chain guides:) Looking forward to the video

[@reidthomas2686]

@@mitchells2371 YES video on chain guides!

[@andrewbergman9315]

What would early signs of such a problem developing be before the engine got to that kind of state? When I bought my car a pre-purchase inspection said the Catalytic Converter was cracked (based on tapping the Cat) but a second opinion I got disagreed and said there would be other symptoms if the Cat was cracked which were not evident in the car. I've never had an issue but after watching this video I've started to get nervous....

[@wokeupandsmellthecoffee214]

What a great channel and you guys certainly know your stuff, however it’s not a good advert for Audi/VW I can’t imagine what the repair was on this job. Good for you though , stay well 🙏

[@chillbro8811]

Thinking about getting 2014 RS5 but good gawd the repairs on these look expensive AF 😵‍💫

[@pauley3651]

Found your channel last night and now subscribed. Amazing work but please change the battery in the smoke detector ! The beeping drives me up the wall !

[@gbw28]

😂 I had to pause the video because I thought it might be one of our hallway detectors!

[@neilcutler8064]

Watching a lot of these excellent videos I’ve come to the conclusion that these high end Audi,s with expensive engines aren’t worth the money the repairs must cost a fortune

[@rayobrien4274]

hi great video. my question is what was the total cost to the owner.

[@DeepakKumar-lv4te]

As a VW Multivan owner, I'm shocked at the bad online press the PD engines get as I don't have issues with mine (regular oil changes) and it's great to drive. However the rest of the online stuff out there regarding the newer VW / Audi common rail engines seem to be an absolute nightmare. And it's no better with other German marques. Tensioners, PCV issues, cats, always something. Are these all best avoided / have the Germans totally dropped the ball with quality/complexity ?

[@YusakuGaming]

mate, you are amazing, the way you think outside the box, nice

[@nancylucas9613]

I have a very shop in Southern Oregon usa!! I love your vids!! soundtracks, descriptions, rock man!!

[@jonstollard484]

Do you have a link for the replacement catalytic converters, what sort of mileage would you recommend they are replaced to mitigate engine failure?

[@etseuros8545]

Love this guy! Great content! The more I watch the more I feel Like I can take apart my own 3.0T some day! 👍😎

[@VAGTechnic]

Thank you! Anything is possible, if you really want it. 🤔

[@jambacardi2474]

Stumbled across this video, great content , subscribed

[@MrStevecrasher]

About two years ago we had one do this for no reason just after an oil change, span a rod bearing and destroyed the engine. We found a used and and got it all back up and running, then someone nicked it off the customers drive…

[@tonychavez2083]

thats a scary thing for 3L TFSI owners because you wont know when/if your cat is coming apart and when you realize it, it might be too late, i guess maybe a simple hand over the exhaust tip periodically just to feel the exhaust flow pulses might be an indicator? damn those cats!

[@vojimirviskov4980]

You are great! I have s4 b8 2010, caka engine, 245000km, i replaced lambda sensors before catalic converters, planed also to change second ones. Do you think catalic converter could be already for change or it ccould last a lot longer?

[@jaystewart3395]

I’ve got a swirl flap code on bank 1 that can prob be fixed with the bracket mod. But also had an overboost code which apparently required a new turbo, that the actuator clip was snapped and glued on

[@VAGTechnic]

Hi , If you want to contact us directly please send us email

[@Hogies_Garage]

Great video!! Fix that damn fire alarm tho!!! It was annoying me just watching can’t imagine having to work with it😂😂

[@britishbatman8598]

Am gona definitely have to check out this place,this guy seems kool & looks like a very good mechanic but just abit worried about how long to fix cars if you need something fix fast cause I can see alot of cars in car park like waiting list,very good videos 4real😎👍

[@VAGTechnic]

Very advance booking , unfortunately after the years there’s always something extra what need doing , sometimes we might end up waiting 2-4 weeks 🥲

[@britishbatman8598]

@@VAGTechnic Atleast you a straight up & not like some people who just take your car & park up in carpark for 4 weeks when u expect back in few days, I hate when they do this cause if car not getting fix u can just leave at home till mechanic have time, ok thanks for update 😎👍

[@adamrees3675]

your one of best in this game!

[@erbterb]

How scared should a curious buyer be by the b8 or 8.5 engines? Are they more or less reliable than the normal A4 fsi tfsi engines?

[@SiiliViin]

I am surprised, that there is no factory safety solutions against that. Usually turbo engines go into emergency and limited boost state, but not this one. Strange.

[@Divine_Serpent_Geh]

These are supercharged not turbo. Hence the blower can’t produce “low boost” since it’s spinning with the motor at all times.

[@SiiliViin]

@@Divine_Serpent_Geh So you say, there is no boost control at all!? I do not believe that. Would be reasonable to use electronic roller clutch, like AC systems have, in case of emergency at least.

[@RigsPGT]

I like that C5 in the background! ;)

[@frankduno]

Hi, what's the milage of the wreked engine. Mine died at 206.000 km

[@audirs4782]

Hi , can you tell me wich bolt i have to buy ( for the crankshaft frame that goes into the shortblock ) ... since they are one time use bolts. There is 3 different bolts.. i just wanna know which one i can re-use and which on have to buy new one. Thanks

[@ryannike91]

Iv emailed you about my sq5 🙏🏽 thank you Ryan

[@9595luke]

This is crazy decat all the way 🔥🔥

[@wes8398]

@VAG Technic Can I bother you to ask what brand catalyst you went with for replacement? And why you chose to keep them in the OEM location rather than relocating them downstream? Downstream GESi or HJS cats in the "midpipes" are the go-to option here in N. America when the owner wants to keep cats rather than just delete them with "test pipes".

[@VAGTechnic]

Hi, We used company in U.K. called Jetex , costumer wanted something what will pass the emissions in London , reason why we left them where they were because they need temperature to work , otherwise they would be just plug in the exhaust .

[@wes8398]

@@VAGTechnic For future considerations; have a look into GESi converters and placing them downstream, in a more accessible - and less hot - location. It's working wonders. You just have to get o2 sensor extension wires, and move the downstream o2. They still reach operating temperature without issue. It just takes a little longer.

[@Wpjgdmtu]

@@wes8398 but does it pass stricter emissions lik NYS or CA? Asking for a friend.

[@tylerevans2261]

@@Wpjgdmtu Ayoo I go went RIT also. Have a b8.5 s5

[@megamediker]

hey man, you deserve many more subscribers, your Vids are escellent!!!!! Roland from good old Germany.

[@eeiko321]

What’s your opinion on the new 3.0T TFSI vs the previous?

[@michaelcoachtechvp2846]

#puretrash

[@eeiko321]

@@michaelcoachtechvp2846 why’s that? Apparently it’s better.

[@michaelcoachtechvp2846]

@@eeiko321 #fulltrash then lol a newer bigger piece of trash

[@795212]

Nice video guys!!👍 Mi A6 3.0 Tdi have maybe the same bad problem, CRTE motor is really difficult to find, 😞 (Loss of crankshaft synchronization/ P191A00).

[@VAGTechnic]

Camshaft position sensor just disconnected one by one always

[@795212]

@@VAGTechnic you are the professional in this conversation but : “camshaft” and” crankshaft” are the same???

[@zemoney954]

Thanks brother,keep it up! Howmuch for a job like that?

[@PCXBGamer]

This is the first video I've seen from VAG Technic. I don't mean to assume but judging from the bike rattle clip he added at the beginning, he is from Czech republic. Just a guess.... :)))

[@VAGTechnic]

That’s a top secret information! 😂

[@PCXBGamer]

@@VAGTechnic 👀👀 its going to be our little secret. 😊👍👍

[@MichaelPanzer]

Hi there! Great video as always and I have my experience with half the same issue to report I have an A6 4F with that engine (CAJA) original 290hp and had it chipped to 350hp. After some time I got missfires on one cylinder bank in every gear at around 6k rpm with a behaviour that felt like a rpm limiter. I changed all the sparkplugs and coils and everything on that side. Still that issue. Then I took my injectors out an gave them to testing (flow rate and spary pattern) and 2 of 3 on the affected side had issues in the top end. I changed changed all 3 injectors on the affected side and the issue still remained. Then I had a look trough the exhaus manifold lambda hole and saw the destroyed cat. Hat to buy the hole part of the exhaust until the middle of the car for around 1800€ (for one side) and replace it. Then everything was fine and the engine still runs perfectly fine and with full power again. The idea that just the cat being destroyed would cause that kind of damage from your video seems very strange to me because the ECU shut of 2 to 3 cylinders due to misfires immediately. I blame my faulty injectors puttin in too much fuel and overheating the cat so it broke. My car has 170k km (110k miles) on it. Thank you guys for your videos and keep up the good work!

[@VAGTechnic]

Hi ! Yes and depends, this car was purchased not long ago so the new owner don’t know the history , we don’t know for how long it was like that and for how long and how hard it was driven . If your catalyst will fell apart completely it’s the best way it can fell apart, however you saw what we took out :)

[@Dmxravin]

Do you use high SAPs engine oil? They tend to clog cats. Also I’d never chip engines unless I have access to super high octane fuel

[@dagnut]

Hi Michael, I have the same car now. How did the transmission cope with the extra power? I'm thinking of mapping mine but it's also on 110k so I'm worried about all the stress the ancillary systems.

[@MichaelPanzer]

@@dagnut hi! So there is no issue I can tell so far with the transmission or the engine due to the plus in power. Transmission still works as good as an old transmission does and puts the power well on the ground. I don't want to recommend doing the remap but I can't say it wasn't worth it!

[@dagnut]

@@MichaelPanzer I thinks it's the exact same box that they put in the C6 rs6 so I don't think extra torque is an issue for over stress , I guess it's how the TCU is tuned. Are you running high octane fuel?

[@ellasOLE22]

Why didnt the owner want to go down the easy and smart option and get test pipes and put the CATS after the test pipes. That way you remove the heat and restriction away from the heads.

[@joelovegrove2557]

Great video VAG Technic! Does this happen on the B9's too. Or are the cats better on that engine?

[@VAGTechnic]

Just Have B9 RS5 here now And the chains are done different way , don’t see that this problem will remain .

[@marlonbaird6070]

Reagrding timing chains why has vw/audi not rectified the issues on the v6s i mean it has been a known issue for years..

[@BaMB00Z420]

i could be wrong but i was always thought that a big audi v6 like that is not made to rest on the pan like that. it can warp or cause gasket issues it should always be held off the ground and weight kept off the pan.

[@VAGTechnic]

Silicon … Plastic one Might crack , not metal one

[@BaMB00Z420]

@@VAGTechnic Thank you for the reply! I love your content. One of the best Audi Channels.

[@GlossaME]

These engines seem to be a ticking time bomb

[@Skyisnotalimit]

Not the engine, the whole brand.

[@GlossaME]

@@Skyisnotalimit Yeap

[@Skyisnotalimit]

@RandomShart I was a mechanic for some years, even standard engines fails. I saw engines fail within 50.000km from brand new, engines making more noise than a metal shop, throwing codes, electrical problems, sensors, Bad steering, leaking all over by oil, coolant, pneumatic suspension fail, coolant piping fail, And you know what!? Toyota’s came in for oil and filter change, and you never saw them until the next changeout.

[@Skyisnotalimit]

@RandomShart I’m not saying a Toyota can’t fail, but standing on the shop floor everyday just changing oil on Toyota’s and getting my hair grey on poor VAG’s tells a story to me. Yes, some Mercedes C class with check engine light came in, but in no way near VAG. BMW engines with oil consuming problems, Vanos fault, and head gasket issues too, but again, some Toyotas came in for a wheel bearing replacement, and when checking the records of the car, nothing else but oil service and some brakes, spare parts for over 340.000km.

[@paulthompson5416]

Top work guys 👏🏼👏🏼👏🏼

[@clementparker5015]

What caused so much damage to the engine? Did the owner drive aggressively

[@raho4036]

The VAG group would been so much more successful if they gave more attention to reliability. Younger generations are flocking to the Euro scene like JDM back in the 90s and 2000s. Would be great if you can not grow a gray hair every month worried about something failing or needing maintenance. Btw no rocker arm upgrade on this?..

[@universeu7289]

Placing the new catalytic converters on the exact oem spot like before was not a good move. These engines are known to melt the metal mesh catalytic very easily even stock. Test pipes in place and moved the catalytic converters lower under the car is the way to go and just extend the o2 sensor wire.

[@VAGTechnic]

They have trouble to make the emissions cold. , long runs

[@universeu7289]

@@VAGTechnic Yes they will warm up slower doesn't matter it's more important keeping engine safe than that. If something when going for emission test you just do a good 30min run and all good. Good job with the channel, very helpful! Cheers!

[@adamprice9214]

Why is everyone saying move the cats further back and not recommending to completely remove them altogether is beyond me 🤔🤷‍♂️

[@universeu7289]

Not everyone likes the stinky smell of a catless system, first of all. Second, if you do 200cell cats than gains are basically the same like catless. Third, most of the places in the World requires periodically smock testing so people doesn't want to pay for install/uninstall every year... @@adamprice9214

[@raptorjesus959]

Wow... that was one hell of expensive CAT CONVERTER...

[@jacobtravis812]

What engine flush do you use ? I use BG product -EPR…. Just wondering if that’s what you prefer to use as well.

[@VAGTechnic]

Yes

[@jacobtravis812]

@@VAGTechnic thank you. Wanted to share a little insight on something that I have learned in the past month or so. When doing a piston oil control ring soak to lesson oil consumption. I have use the EPR on the bottom in, but I also have used the part number 260 WOR-BG product FOR THE TOP END PISTON SOAK. I DID A LOT OF TESTING IN DIFFERENT JARS WITH CARBON DEPOSITS AND I HAD FOUND THAT IT IS PHENOMENAL IN CLEANING OFF OLD COKE UP CARBON RINGS. I SOAK EACH PAIR OF PISTONS AT TOP DEAD CENTER FOR 24 HOURS EACH AS LONG AS THE CYLINDERS LOOK GREAT. I HAVE WENT FROM 1 QUART EVERY 500 MILES TO NOTHING SEVERAL TIMES ON THE AUDI 3.0 TS.

[@AveenB]

Are there any sensors on the catalytic converters that tell the warning signs before it causes more damage?

[@VAGTechnic]

Hi, You might have fault code with catalyst trashold, but had S5 here not long ago and it only had misfire above 4K revs

[@str8downskydiving507]

Great work guys, love the videos, can you also list the music please

[@RS-xj6tz]

New follower! Loving the content!

[@VAGTechnic]

Thanks for subscribing! Will do our best to keep you entertained in the future as well

[@douglasblack302]

Hi there big Audi fan here, I have a question that’s been bothering me since I bought a salvage A6 avant. The steering seems to be locked not the steering lock itself but I have no steering at all when the car is running, at first I thought was the electric steering rack was knackerd but it looks fine and not sure if it’s to do with the crash itself that’s locked it. Any advice would be great.

[@theephemeralglade1935]

An Audi engine failed?!! It's so hard to believe! LOL!

[@RomanTrollanski]

Great work! I wish car manufacturers nowadays would care more for environment and start building cars like back in the 80 and 90 era.

[@godwor848]

Excellent job !

[@jj-tq4hx]

I made the huge ignorant mistake of not changing the water pump and thermostat when my Indi mechanic changed my PCV valve. Yesterday my car over heated so big mistake! Hope I didn't blow the head gasket..😩😩

[@VAGTechnic]

It’s always good to change everything once is open

[@ChrisBakerTrance]

Great content and very interesting 🤙

[@sinoperture]

So with this engine, on my A7 as well, I've replaced all the usual known issues. Engine mounts, front sway arms and PCV/oil pump/thermostat stuff. So is the catalytic converter failing a risk to the engine? IE does debris flow down the exhaust manifold and back into the block? Would a pre emptive fix here be wise if that is the case? Car only has 50K km on it.... keen to see it do another 50K km without any surprises too.

[@binderrik087]

Get those Cats out Meow! They are a well known item that fails and causes engines to pop.

[@sinoperture]

@@binderrik087 So is it due to how close the cats are placed to the exhaust manifold? I'd have thought normally tat gravity and distance would make it impossible for material to flow the wrong way back into the engine?

[@binderrik087]

@@sinoperture hey mate. The material cracks, melts and can become dislodged severely reducing the flow of exhaust gases from the engine. It’s the reduction of exhaust gases that cause pressure to build in the engine and blow ring lands or spin bearings. In this video it happened on a stock car (like many others) but if your cars tuned it’s going to happen. It’s just a matter of time. Have the cats gutted or buy test pipes and get a test pipe tune.

[@sinoperture]

@@binderrik087 Ta. On APR Stage 1. I'll speak to my mechanic about options. This didn't come up in my searches of known issues. But after this vid I searched in a more targeted way and have come across it a few times. Every Audi I've owned has been a servicing nightmare - hence why I went Porsche on my last sports car - that thing has been banged on like hell and is fine and purrs. I can't afford a Panamera and there are so few non SUV family cars left that are also not totally boring or over the top powered up...... so I went with a second hand A7. Just trying to now make sure it stays well behaved.

[@sinoperture]

@@binderrik087 Its the cats up int he engine bay near the headers? Not any cats further down the pipe right?

[@peterg6638]

Great work guys. Question will this engine fit in a 2007 audi with the 3.2 lit?

[@cameronbaker5862]

No

[@fatclimber6567]

LMAO, Audis. I used to be a big fan. Owning a VAG shop, congratulations, you are going to be rich.

[@eoinmcgowan]

Was thinking about getting a audi a7 but the timing chain issues have put me right off

[@VAGTechnic]

Every bigger engine have chain and every chain will go one day :) there are plenty out there running without issue, but once it goes , it goes deep in to your pocket

[@cornell833]

Your vedios are Amazing keep up the 👍 great knowledge 👏 The 🌎 is watching And love it 💪 #nebraska

[@Unknownas1337]

Hey VAG Tech! Loved the video. Wanted to ask you. My cousin just recently bought a 2012 Audi S4 3.0TFSI. He drove it for about a week and the Check engine light (CEL) came on. Today he went to the electrician and he scanned 3 codes. P045500 P052A00 and P052C00. The first one is something with the fuel system (fuel cap was put on not correctly ?). The other two is the ones with the camshaft sensors in the bank 1 if im not mistaken. He managed to clear the codes out. Do you think it's safe to drive it if it doesn't show up again after a week or two ? What would you suggest doing ? My cousin also feels like the car starts longer now in the mornings when cold. So is it a bad camshaft/crankshaft sensor or the timing chain is out of adjustment and skipped a tooth ? Thank you vey much for the answer man.

[@VAGTechnic]

Hi if you have incorrect correlation fault timing will need doing

[@Unknownas1337]

@@VAGTechnic How can I check if I have that? Any symptoms? Because engine sounds normal, drives normal. Just starts in the mornings a second longer.

[@undisputedtruth2075]

Hi. Can you give some sort of idea of the cost of this engine replacement including all parts and labour?

[@VAGTechnic]

7-12k depends

[@6pot]

wow ur good.. so many high tier audis there..

[@Airman..]

Badass production

[@henrymatthews9365]

Wow. Truly eye opening. I guess if you open up a European car repair shop you kinda just print money. Looks like everything is an engine out repair

[@VAGTechnic]

This was just service … not repair 🤓

[@nwaezemagdalene4967]

Hello bro help me let me join u am In Dubai I do love working Audi cars

[@nwaezemagdalene4967]

Is like you don’t have people working for u

[@psiturbo]

it would be great if you could dive in the how many km in the odo, missed services, etc, so to have an idea about the history of the car. You need a new mic

[@stoeptegel50]

The new catalytic converters will melt and block again if they are placed where the stock cats are placed. When tuned, these cars have an exhaust gas temperature of over 1000 degrees Celsius; even high flow cats from the best brands can't stand that amount of heat. Only option is to place the cats further down the exhaust, under the car, in the midpipes.

[@VAGTechnic]

Hi, We were discussing this option , but it won’t pass the emissions test afterwards.

[@johncoldwell340]

They would melt they just don't work if the gas can go around rather the through, it is essentially a decat that looks stock

[@adamprice9214]

Would it not just be better to get the cats removed/gutted altogether and give you more power with less hassle as I've just bought one of these and considering this option

[@ajclark809]

Excellent work my friend. May I ask what you use to wash the car at the end? It looks absolutely fantastic!

[@markthurston601]

you should open a vag salvage yard and breakers too just saying

[@VAGTechnic]

No thanks , too much dead money

[@deanarmiger8456]

Just found your channel, very good loving the content. As someone who is looking to possibly buy a s4 3.0 tfsi in the near future any things to look out for other than cats would be appreciated. Have heard to avoid the 2009/2010 s4 due to engine failures. True or false?

[@deanarmiger8456]

Big Audi fan by the way..had too many too list. Currently running a remapped B7 estate 2.0tfsi fwd..great motor and no slouch either..

[@VAGTechnic]

Hi thanks ! Don’t think the engines are bad in the earlier years , just auto boxes had issues

[@Hopefull-68]

Are the 2015 engines reliable ? I just bought a 2015 B8.5 S4. 29k miles. Is there anything I should be careful of ? Tuning in particular?

[@jimmcculloch3786]

Would prefer to hear cooments during stip down instead of the 'pop' music!

[@speedshed]

Hi VAG Technic, would my 15 plate RS5 engine have the same potential CAT disintegration issue that could wreck my block too? It’s currently on 30k mls?

[@VAGTechnic]

Hi let you know , working on one now ! Doesn’t look good

[@speedshed]

Is that going to be a KZbin video too? Would be worth a watch. What is your pre-emptive advice to avoid this issue?

[@riccccccardo]

7 year old car 😳

[@gbw28]

@@riccccccardo Only 30k miles too. Hope his is ok.

[@riccccccardo]

@@gbw28 Audi are shameless company I’ll never own one ever again after two engine failures on mk7 a4 2.0 TFSI I had.

[@cappew8211]

Great work! Pretty nice to watch, but a bit too much when the cod montage editing came in xD

[@Prisonmike89]

Just when you think Audi has a reliable engine with good power LOL. Bummer man

[@BenState]

Got a sub mate, nice content