How to diagnose engine oil consumption. Compression and leak-down test | Redline Update #6

[@neilgreen007]

Three years later and this video is the gift that keeps on giving. What an excellent presentation. Thank you!

[@daviddntait]

Ok I'm just baffled and annoyed that someone would dislike this guys videos!! He is very much the same kind of guy that taught me all the knowledge I have and I very much enjoy these tutorials. People pay tuition to learn far less than Davin can teach you in minutes.

[@kmburges]

I have become addicted to redline rebuild videos Maybe more so than watching breaking bad. I think the first clue of my Addiction was when I reschedule a quarter end results staff meeting to watch the Buick nailhead update video number 4

[@beetee801]

Im glad you have your priorities in order. 👍

[@CLVannoy]

Keep living your dreams

[@OldCarAlley]

My diagnoses is, stuck oil control ring on cylinder 3 for sure, and sticky oil ring on the rest, from short runs and lack of oil changes.The oil looked nasty when it was drained. It will be interesting to see, when you get it apart, what the true problem is. Great video!

[@kenkinder6433]

Bought an 1978 GMC 3/4 ton pick up big block454 at very low price with all plugs fouling. Did compression tests all good enough. Intake manifold looked wet, so cleaned, tanked and then magna fluxed. Filings showed crack running from side to side right under the carb intake. It was sucking oil up through crank case. Installed new intake manifold and no more fouling. I used and abused the truck for years and sold it to a friend and still running strong with no fouling. Workhorse gust gas hog averaged 12.5 mpg.

[@mortenvanvik7082]

Nice video! Tomorrow my rebuilt muncie M21 4 speed gearbox is going in my '72 Camaro and I will start my 396 again! So looking forward to driving her again. And more videos from you. All the best from Norway.

[@trillrifaxegrindor4411]

best of luck,you are a very lucky guy.check and recheck everything you can and make sure to setup your clutch,pressure plate etc right.(im sure you will)_

[@mortenvanvik7082]

@@trillrifaxegrindor4411 Thank you! Yes I'm lucky and, yes, I will check and recheck. This is my hobby so no rush. All the best to you!

[@greasemonkeychris4128]

When doing a leakage test I've always just balanced that particular cylinder on TDC so you don't have to worry about the engine swinging around and valves opening on you. Start off with #1 top dead and work your way through the firing order. Can use something long and thin like a welding rod or a long screwdriver through the plug hole to feel when the piston stops. 👍

[@egomezmx65]

Another success of a video! and even when the diagnostic was not good I'm glad it happened so we can enjoy more of your videos!!! Thanks a lot for taking the time! They are clear, very well produced and with an excellent crew!!!

[@Slicezwow]

Keep these videos coming! I love this professional step by step methology to solving problems. Out of curiosity what would you recon a service like this would cost the owner? Keep up the good work! All the best from Denmark

[@jesuslite2000]

Thank you for taking the time to really explain what you are testing and why. Seeing the process as a whole really helps me know how to approach my own engine issue diagnosis.

[@kadenwood9278]

It’s crazy that you guys put out these videos for free.

[@iambrian6601]

That’s some of the most educational engine diagnostics I’ve seen. Mind you I can turn the wrench but don’t know why. Kind of a lego piece rebuilder if you will. Learning the why is fascinating. Thanks!

[@BarterBales]

My Honda magna was burning oil and this video saved my ass. Thanks guys!

[@Oscarphone]

From looking at the other plugs, the ones covered with ash, I'd say the motor is running hot consistently (wrong octane fuel or low quality fuel). The ash could also be from a small bit of oil leakage into a hotter cylinder. Not all oil burning shows up as an oil foul symptom like the plug he is working on. Great vid. I'd like to find out in a future video what the ash deposits are from for sure.

[@blkdna748]

Yaaaa we I'll be watching new rebuild. This is the perfect way to diagnos engine. Thank you for the class.

[@pandusaragih2352]

If the rings are bad, try check the dipstick after/while the engine running. Piston rings should seal oil & combustion chamber in two way, if the rings broke exhaust gas will pass through the ring and you can find exhaust gases from dipstick.

[@usedsocks89]

Genius! Thanks a million for making the walkthrough. It’s makes so much easier because I have a 442 and had no clue how to diagnose the issue.

[@babayaga_wick1638]

Thank you, i had a problem recently with my 4.6 grand marquis. I coudnt figure out where the oil was consuming. It didnt had no leaks. Thank you so much

[@rogergoodman8665]

Very informative video! Sad though for an engine that was rebuilt only a few years ago, but to be expected I suppose since apparently everyone & their brother are allowed to drive the SS like they stole it without repercussions. Well, like you said, we'll get to see the 396 rebuilt again!

[@garthhowe297]

Thanks! That is the best, most straight-forward explanation of these tests I have seen.

[@jc-qc3yu]

It’s always a pleasure to see you doing your thing thank you for the information brother

[@dimitrisv7068]

Ahhh you are the best Greetings from Greece !!! 🇬🇷🇺🇸

[@kurioskabourhs2089]

πσσστ κιαλος ελληνας εδω

[@dimitrisv7068]

Δωνεεε !! Παντού είμαστε

[@bruhmomentum1994]

Παμε ρε

[@User_76ytrl]

Hello my friend nice Video Καλησπέρα πατριώτες 👍 🇬🇷

[@MartinodePueblo]

Love the content! Can't wait for the next video about this engine! Greetings from Holland!

[@scotforman1894]

Great video. I learned so much. Of how to do it the right way. Something else that can cause this exact problem is a intake manifold gasket failure between the oil passage and the air intake runner

[@daviddntait]

Yup I fixed that issue a couple times on later model 5.7, 5.0, and 4.3 Chevy engines.

[@CanadaBud23]

Could be, unfortunately you'd have to take the manifold off to find out lol. Ya never know, we'll find out when he tears that bish apart!

[@erickwise2068]

These videos are so good, love em, please post more!

[@cjlawrence03]

Enjoy all your Redline videos and especially this one. Learned a lot. Keep them coming!!

[@thierrypereira4137]

The King of diagnostic👍🏻

[@Mister006]

Davin's the real deal. I'm glad he's in a good place (plus, free to help us understand some serious engine stuff) and not in some cheap twisted shop with cheap and twisted people.

[@ecmjr]

Learned some new stuff and love the image quality of the video!

[@Hagerty]

Thank you for watching! More to come.

[@shawnmrfixitlee6478]

well that says it all , Time for a rebuild ! .. Sure had hope on the valve seals being the problem .. ENJOYED

[@BillyN31]

My favorite channel on KZbin!!!

[@compt3ck]

Make sure the throttle is open when doing the compression test for best results. Great videos

[@compt3ck]

I was mentioning it mainly for people doing it for the first time themselves.

[@johnmilner7603]

If you add oil through the plug hole and the engine is on an angle, that oil will sit on the low side of the block. How's the oil going to get over to the other side on the intake side? I love watching others wrench cause I wrench too. Keep the videos coming guys.

[@brand-x7049]

Oil will wick into the space between the piston and cylinder around the rings, and as soon as the motor is spun, it will spread and seal.

[@marcryvon]

Thanks to you, this ol' geeser here learned something new today ! Kudos !

[@stymiesnerdly771]

Great content! Loving this series, but if you ever get back to traveling & working on other people's cars, my garage door is open!

[@williamg.rodeschin7811]

This is a great series....more!

[@oliversworldofwheels4910]

More already! Awesome! Nice job! Love the video like always!

[@SenorSiesta]

Great video thanks! Question; when performing the leak down test does it matter where the piston is in relation to TDC?

[@johnmilner7603]

No, as long as you loosen the rocker arms so the valves can close. I like to tap the spring retainer to seal the valves in case of carbon build up. But if you don't want to loosen the rocker arms then you need the piston of that cyl at TDC on compression stroke so both valves are closed.

[@ALABAMAHEADHUNTER]

Engines out ! Looking forward to the rebuild , the 396 is my favorite engine .

[@idrivearttabletennis]

Great explanation - thanks for doing this.

[@bradthompson5865]

Very informative video! Can you expand on what causes the white color on spark plugs? I have an oil consumption problem and have been trying to track it down, after putting new spark plugs in very recently and pulling them to do compression and leak down tests I noticed that all 4 plugs(dodge 2.4L turbo) have a white residue on the ground electrode. Any pointers to send me in the right direction would be greatly appreciated. Cheers!

[@prtyof4156]

You guys are putting together some great videos! Keep it up!

[@hidmagnum]

Dropping knowledge one video at a time. 👌

[@Hagerty]

Many more to come!

[@VNSavedStuff2011]

Excellent explanation! Thank you. Very helpful.

[@ellieprice3396]

Great instructional video. Question; How do you correctly determine the compression ratio? I know how to figure cylinder and compression chamber volumes but not how to determine dished pistons and piston clearance to the top ring. Thanks

[@radarnj8043]

I was taught if you step on the throttle and get blue smoke its rings. If you back off the throttle and get blue smoke it's valves.

[@WilliamDye-willdye]

Excellent walkthrough.

[@alicutz79]

I didnt movt watching this video, very good job, i have the same issue whit my passat, drinks 1 liter of oil at 2000 km, will try to find out here someone who could do compression an leakdown tests, thank you for this info

[@sonyhk3824]

Great job. Cheers guys

[@johnschutt9187]

I love watching your videos. Thank you!

[@alislom94]

Very good information thanks for your hard working..... I appreciate that....... Greetings from Syria.....

[@danieltahin4164]

Really good video. It makes clear what really causes high oil consumption (...the rings and not a leak somewhere). If I buy a used car, is there a reliable way to detect if the car has already a high oil consumption (like 1 litre pro 1000 miles) ? Does the compression test also work if there is a lot of carbon built up on the oil control rings ?

[@organicmechanic1662]

Hey don't forget that oil can get into cylinders from bad valve guides and worn valve stems also.

[@invertedpolarity6890]

Thank you for these great videos.

[@dinoibrahim2665]

Thanks. I greatly appreciate it.A good video and explanations

[@billwilliams6338]

HAGERTY, why didn't you put the cylinder in TDC top deal center when doing the cylinder leak down test? you just removed the intake valve and exhaust value for only cylinder#3?

[@wcjcnc]

Why don’t you run the first gauge up to 100 PSI so that you can subtract the second gauge and get the exact percentage of leak down? Why do you stop at 90 PSI? Great video by the way. Most of the videos on KZbin about how to perform this test are ridiculously wrong

[@gnarlytothemax]

love watching these. theraputic somehow..

[@cruisingdanny4974]

Very informative, learned a lot! Still don't really get what causes the valve stem seals to leak, could somebody explain?

[@compt3ck]

Chalky white ash deposits is usually fuel additives or oil burning. Looks like #3 was so bad it oil fouled. Time to rebuild and make some big block power.

[@RadRidesByCru]

All the dislikes are from people who work at the machine shop that built this Camaro's engine.

[@nikosraptis1985]

Hello there, thanks for sharing and Merry Christmas! Is the oil on the thread of the spark plugs and indication of damage? If you see the thread of nearly all of them are too oily. Cheers...

[@Formulabruce]

Curious on new ring choice.

[@daveanderson5680]

The WHITE on the spark plugs is made by water vapor from the PVC system.....the ring blow-by contains the water vapor....a by-product of previously burned fuel being reintroduced back into the combustion chamber instead of going out the exhaust the first time around

[@johnmilner7603]

Dave Anderson that's why I made a catch can.

[@alexly627]

Lol at 12:47.... the dreaded deep breath in to proceed with what you know is coming....

[@kachkhan8023]

Please do more videos like this. I wouldn’t mind a half an hour video😝

[@Shane-Singleton]

Showing how to troubleshoot it right. It sucks that it's the piston rings. Valve seals would have been much less of a costly pain in the butt to deal with. Although while you've got it apart I suspect that the heads will get a service too.

[@bymancini1]

Wonderful tools man !

[@nicknogalo1535]

Where are you guys in MI? I’m from Sault ON so I’m more of a Michigan boy than anything else.

[@Greaseland]

Sometimes oil can get in the intake port from the bottom of the intake manifold.

[@fila1445]

But that still means you have blowby at rings and oil gets to intake by PCV hose

[@kalfoogaltmimi5043]

Welcome We want to write a link to purchase the scan tool Thank you

[@gsonn18]

Thank you!

[@chrismannifield3222]

With it that bad, I'd imagine you have an oil sample sent out to see fuel dilution, an intake leak on the underside of the intake will do this almost exactly as you've described

[@ellieprice3396]

A head gasket leak can also cause one or two cylinders to check low, but fouled plugs in this case indicates this is not the problem.

[@joachimjohan1215]

i wonder if the valve stem seals could have blowby and can it be heard when leakdown testing?? also what do mean when you talk about the white crust on the sparkplug reffering to leaky stem seals? Thanks! Cheerz!

[@sashaeffer]

Scored cylinder walls also a possibility?

[@themechanik5980]

I have a question because it has always interested me, you can do a leak test, in a healthy motor so you can see how a healthy moter behaves there.

[@Oscarphone]

Sure.

[@themechanik5980]

Steve Prestek I mean I learned mechanic but I never did a test on a healthy / new engine. That’s was nice.

[@mikechevelle3418]

Awesome video. Thanks

[@ironfistarrival]

Hi , you should have hocked your battery to a Battery Charger while Cranking the Engine to avoid Discharging the battery , right ?

[@supermolibden5037]

I have a question for you. I have a 3.1 V6 engine (LHO, GM) and I have oil in the intake manifold. All spark plugs are very white, with white upper electrodes. Does this mean that oil is burned in this engine? Compression on all cylinders is equal and perfect, 190 psi . The oil quickly turns dark in color. I'm asking for help. Best regards, Adam from Poland

[@thesetruths1404]

Thanks for more info. Question for you, as to what product and how much you think I should use. I have a 1995 Subaru 1.8L 4-CYL boxer Impreza, 177,000 miles. I have 76 and 78 PSI dry compression in #2 and 4 of one head (driver side). This started a few days ago, we noticed while on a highway trip the power was weak and I can hear it missing as the RPMs drop from driving to idle. I don't have overheating, excessive oil consumption (drippy seals, I add a quart about every 900 miles), smoking, or fluids cross contamination. I'm waiting to have a leak down and another dry/wet compression test at a different shop. The first shop only did dry compression and wasn't too bright or helpful. If I end up having a head gasket leak between those two cylinders, what products would I possibly try to mend it? It must not be too bad of a leak, whatever it is, for the compression to build to 78psi dry. The other two good cylinders are 130ish psi. If it ends up being a valve leak, what products and strength could I try to get them clean? After cleaning, I will have valve clearances checked, as it's probably never been done. Thanks again.

[@stevenhauser653]

I have a 305 boat engine with all 180 and 1 cylinder with 150 what do you think about that? Spark plugs look the same, boat sitting for years and did not start it yet since it needs new manifolds. Thank you

[@KornKorn-n8l]

I have a 2014 2.0 TSI engine Tiguan volkswagen. I changed the spark plugs my self and there was oil on three spark plugs. Every 1400km the check oil level sign pops up. Can this be the problem where the engine burns oil. Or there is something else to check. Changing the engine top gasket should fix the problem?

[@2trkpony471]

Great tutorial sir!

[@ThatYellow62]

What about oil from the pcv or a bad intake seal?

[@Adi-kr5nd]

Damn I'm only 14 and i actually learnt something, thanks

[@marcryvon]

There's no age to learn something new, Adi. I'm 66, mechanichely inclined and do most of my cars, mower and snow equipment myself. I heard about Leak Down testing but never knew how it's done. Now, thanks to Davin (?), I know how and why. If you want to learn even more, look for "Mustie 1" on YT. This nice man is a VW Beetles and busses nut. He buys at garage sales or find on roadsides all kind of small engined equipment or bikes, fix them on the cheap and sell stuff on Craigslist. Amazing mechanic and great teacher at that. Check him out !

[@deathbyhobbies]

should the engine be warmed up before this?

[@kristofbordas1993]

Beautiful!!!

[@julionthomas1381]

Hi guys, do you'll work on trucks cuz am having the very same problem on my 8DC9 V8 engine

[@albertorivera4337]

they could make a video showing all the tools and equipment that they have?

[@jamesbond9873]

Great video!

[@Hagerty]

Thanks for watching!

[@braleyshardwoodcustoms8584]

What's a good indicator I have a rear main leak?

[@petewitt2867]

Great content. Thanks!

[@guillermonieri4203]

Thank you.

[@dougankrum3328]

Leaking rings..no problem, just pop that motor out and how about a valve job while you're at it..! So, how well did the engine run anyway...?

[@ismmon3869]

Could this qualify under PI 1802 code? Lmk please ASAP. Thank you

[@trifivegarage8683]

well explained thank you!

[@Paul-qq7mh]

great video thanks.

[@ozzstars_cars]

That engine seems to have worn out prematurely. Who screwed up and what was it?

[@isaakwelch3451]

He did say it had a lot of heavy use. Who knows how many miles it has or how diligent they were with oil changes

[@billwilliams6338]

HAGERTY, // If the PSI level values compared to each other cylinders was more than 10% to 20% what would be the problem with the engine?

[@kevinmorrissey8846]

Fine line between a red line and a dead line