V12 Jaguar Engine DESTROYED By One Small Mistake

[@jorgeantonini201]

So jag story time: Used to work at a Jaguar dealership and out back in the smoking area there was a v12 half disassembled not too far off looking than the one at the end of this video…. It was there because it was the “pissed off Jaguar mechanic punching bag”. Had been replaced years before I started working there and left out for whenever any of the mechanics got angry at some stupid Jaguar design of some kind, we could go out and beat on it with whatever tool or other engine part we had around and take some edge off. It had axles punched through pistons, tons of hammer marks, air chiseled chunks taken out of it, marks from being beat by pry bars, etc. Cool story bro, had to be there.

[@diranhayrabedian3386]

nobody cares

[@fredericoespinoza]

Your mom​@@diranhayrabedian3386

[@GOLD_FEVER]

@@diranhayrabedian3386 You cared enough to comment.

[@BasedEMT1776]

would just like to state that I care.

[@jorgeantonini201]

@diranhayrabedian3386 Charles cares He asked for Jaguar stories in the video Seems he doesn’t care about you tho…

[@TheHurst63]

These are great engines. They are bulletproof - but I guess not if the owner dropped a stud in the engine. I have torn mine apart - new injectors, Teflon wiring, better coil, and it runs so smoothly. As others have said - these are LeMans winning engines in the late 80s - knocking Porsche down the ranks. The HE engine shown here has an 11.5-1 compression ratio. Those heads have the combustion chamber closed off around the spark plug to create a compact flame front. Very slick.

[@ceeking76]

kzbin.info/www/bejne/g2qsaHqNodGDfLs&ab_channel=Sciflyer

[@Hamish-y2c]

Yes they are, I have personally raced two. Even Ferrari admitted they were good.

[@That_Handle]

Had no idea of the pedigree, etc. Thanks for the info.

[@Schlipperschlopper]

You cant use any V12 Jaguar because these engines are made fom material made in India and drop valve seats any 20.000 KM!

[@Hamish-y2c]

You couldn’t be more wrong. They only drop valve seats when overheated. @@Schlipperschlopper

[@paulb1034]

Jaguar made 160,000 V12 engines over a 25 year period, a legendary power plant, just a shame some owners don't maintain them properly.

[@garycollins918]

Excellent job there Charles. How about a VW V10 diesel teardown/rebuild?

[@HumbleMechanic]

This is THE most requested!

[@grandpateal]

I agree my inner love for the Touareg demands this from you!

[@TheUberdude14]

v12 tdi from a Q7 would be cool too

[@missg300]

​@@HumbleMechanic hey, greetings from Scotland.im a lover of Volvo's,what about a tear down of the 4.4 v8 engine?😊

[@Messier87_M87]

This video is gold. We need so more oddball engine tear down videos, like this one! Thanks Charles!

[@derek6ferrari]

if you like engine teardowns like this, check out I Do Cars. He does a teardown every Saturday night. Very entertaining channel.

[@guzziwheeler]

Jag story: I once wanted to take off the cylinder head of my 4,2L 6-cyl. XJ6. When trying to lift off the head with a hoist, I eventually found the front wheels off the ground. It was the same issue as on your V12: The headstuds, which run thru the water jacket, were rusted up and seized to the bores in the head. It took me two days with a hydraulic duck-beak style spreader to wiggle it upward, millimeter for millimeter. Man, was I pissed. Now I know there is a special tool for those heads, a kind of puller. It is a steel plate which bolts to the studs of the camshaft caps. Then bolts are screwed into the plate, they press against the head studs, forcing the head off.

[@orbassasin]

I made this tool for pulling V12 heads and then I made a similar one for pulling the heads on the 6 cylinders. They’re almost always stuck.

[@petebach7221]

I have the same story. Unbelievably stupid design.

[@BoogWar01]

Actually there are places on the engine block that one can put a simple hydraulic jack on. Leave the manifolds on, and just work the head off the stud forest one corner at a time.

[@kennethtalbott2233]

yep, i made one, god knows what happened to it....

[@paulgibson490]

Cam chains are the way the modern engine is totally crap compared to engines in the 80s. The way to destroy your car or van.

[@bigalalbig]

Great engines, short stroke designed for racing. Just lovely these days with a manual box conversion.

[@TassieLorenzo]

The Jaguar XJS Group A is a wild sounding race car! It's so loud compared to other Group A touring cars (and the tone is excellent too of course).

[@wayoutwest4944]

The trays under the camshafts are meant to hold an oil bath on the cam when the engine is shut off. When the engine is started the cams are already sitting in an oil bath. As the engine runs the oil is pumped up to tray, excess spills over back to sump. When engine is stopped what's in the tray stays until engine is run again.

[@laalaa99stl]

Congrats on not letting the second half of that cylinder head defeat you! 😆

[@spacemansproggit5627]

Very good friend of mine used to race the XKE/E-Type back in the day... He used to run a worked-over 3.8. Bored out to something closer to 3.9, specialist pistons and rods, replacement forged steel crank, courtesy of a contact who operated a "Dunbar & Cook" Crankmaster... Swapped out the standard SUs for a set of triple Webers (45 DCOEs IIRC) on a specialist, one-off manifold. Good for 9000rpm and peak power at around 8k. Which might not sound like much in comparison with modern engines, but considering this was all based on 1960s design, not bad at all. And he went with a tuned up 3.8 over the 4.2 as the latter had all sorts of overheating issues when pushed hard. Despite the higher states of tune the engines were largely bulletproof - the "weak link" was either the gearbox (which my friend described as "agricultural" / "better suited to a tractor") and, until replaced, the wheels. He started racing on original, center-spinner spoked wheels... until he found spokes literally pulled through the rims where he was cornering so hard. Epic.

[@ronnieboucherthecrystalcraftsm]

i had a 1971 xj6 and it was great = put a manual choke - rebuilt carbys and distributor - some brakes and suspension = 130 mph just great = rebuilt engine - 270 bhp and then got a 1968 MK 2 daimler v8 250 sedan = super engine sound - bullet proof motoring !

[@davidcrouch3226]

When you got the first one off with just a prybar, I thought, wow, luckiest guy in the world, then the second one wouldn't come off no matter what and I felt better. That is normal. Welcome to the club! There is actually a special tool to help with it but it can still take days.

[@rennkafer13]

Ferrari V12's from the 60s/70s are similar in getting the heads off. They used the steel studs to locate the head so they're all close tolerance holes, until a little galvanic corrosion happens, then they're no clearance holes. Last 330 GTC I did, I had to machine special tools that bolted in place of the valve gear and pushed on the studs. Still took several days of heat, penetrating oil, and other gentle persuasion to get them off.

[@rennkafer13]

@@That_Handle sure you could do that if you wanted to destroy the head and the block.

[@ivanjulian2532]

@@rennkafer13 I'm curious about your opinion on something? In your view, which was the better engine? The Ferrari Colombo V12 or the Jaguar V12? Also, which was easier to work on?

[@ivanjulian2532]

Did Jaguar ever release a quad cam 4 valve version of their V12?

[@rennkafer13]

@@ivanjulian2532 never did much with Jag V-12's as far as disassembly personally. As far as which is better, both can be built and work well, from the factory I'd give the edge to Ferrari.

[@davidvonslingshot]

I openly giggled more times than I care to admit. your commentary is gold.

[@LPX]

That foamy coolants is from mixing different types of coolants together. I work on transports and I’ve seen it multiple times. Drivers top up with whatever, next thing you know it’s foaming out of the reservoir, making a massive mess

[@chuckschillingvideos]

Yep.

[@daos3300]

that engine is totally worth saving

[@thecampchaoschronicles9567]

It was. Not any longer.

[@blindmotion8121]

@@thecampchaoschronicles9567 A bit hard to watch at the end and not a terribly difficult fix.

[@mchristr]

Dude is a hack. Putting all those tool marks on rebuildable aluminum heads and block. If the block and heads were cracked that would be a different story.

[@jsr3793]

These cars are actually what made me work at a dealership in the first place. I worked at the corner garage (now a pizza place) and we had an unusual number of old (at the time not all that old) Jags in the area. That and a service writer that just couldn't say no) brought a lot of these into the shop. These things drove me to a Hyundai dealer (at the time just a few steps above a used Yugo) but it was still better than trying to do a set of the inboard rear brakes on an XJ 6/12. And do a rotary. And if you truly want to be awesome swap the engine into a classic bug.

[@ThePaulv12]

It's not the brakes, it's the hand brakes that are difficult.

[@ColinMill1]

@@ThePaulv12 Yes. I had an XJ6 and my father an XJ12. I did the rear brakes and handbrake on mine the hard way but we dropped the rear subframe on the XJ12 which was, in the end, much better.

[@Mk3COrtInA2000]

Those rusty head studs are common on the XK series 6 cylinder. They sit in coolant jackets and they go way down into the block. My dad once had to scrap an entire engine, after a week of hanging the front of the car off the ground by the cylinder head, with soaking of various oils, he resorted to the porta-power. He gave up when the block broke.

[@paulluce2557]

A story I heard somewhere was that when Ford were in process of buying Jaguar in late 80s, some Ford people came to look at one of Jaguars factories in UK, probably in Coventry area... and found a lathe that dated back to 1896 still being used to produce one particular part....

[@stuffandjunkandthings364]

You said you're too young to have had a proper Lucas experience, Hell, those of us that are old enough to have been around them new have never had a proper Lucas experience either, because they never worked properly. Lucas electronics were so good they could get five functions out of a two position switch- On, Off, flickering, intermittent, and half power. Lucas headlight switch positions: Off, Low, High, and Maybe. Lucas ignition systems saved their owners thousands if fuel costs... because you can't burn fuel if the car won't start. People say Ford invented intermittent windshield wipers, Those were actually invented by Lucas. Ford, however was the first to do it on purpose. Lucas had cylinder deactivation WAY before anyone else...

[@HumbleMechanic]

hahahah aFAIR POINT!

[@orbassasin]

Lucas- get home before dark. Why do the British drink warm beer? Because their refrigerators are made by Lucas. If your jag isn’t leaking oil- are you sure it has oil in it. Land Rover- making mechanics out of drivers since 1948. Lucas wiring harness replacement smoke is available in case you’ve accidentally let the smoke out of your original wiring. Land Rover- we will take you anywhere, and leave you anywhere. I’ve found Lucas wiring itself to be fairly robust. The plastics inside the switches has a tendency to crack and that makes the switches fail. The switches also use contacts and so carbon up over time leading to failures. Most circuits in British cars do not use relays so full amperage is passing thru switches instead of relays- leading to failure. Lucas also did not use waterproof connectors hence more corrosion and failures.

[@georgerobartes2008]

A common phrase here in England : Lucas , The Prince of Darkness .

[@thebigpicture2032]

@@orbassasin shocking that in a damp country they didn’t think to use waterproof connectors. Makes no sense.

[@rumpoh8039]

WHAT DO YOU EXPET FROM A FREEMASONRY COMPANY????? DANARM WAS 100% FRAUD TOO

[@robertpatton7442]

I had hoped it would have turned out to be the broken distributor cap as being the issue/noise. I've had it happen to me and a shop told me to get the timing chain changed as it "jumped time"...for $700. I was relieved that I took it home and found a $15 fix after my $150 (incorrect) diagnosis.

[@V8.77]

Those viscous coupler fans have been destroying bonnets/hoods and coolant hoses for many years lol. Very important part of semi regular maintenance on any older vehicle. Love these types of videos, thank you so much. I had a 1966 Jaguar Mark 10 420G. Had a honking big 4.2 straight 6. Cool car but as you say...Lukas LOL. All the best good sir.

[@alexandrecouture2462]

I converted my Jag XJ40 to an electric cooling fan and it is much better. Now I can hear the engine, not just wind noise. It also had a small impact on fuel economy.

[@V8.77]

@@alexandrecouture2462 oh wow, that's awesome! Nice car by the way. A nice stainless steel exhaust sounds so fantastic on those old Jag engines. All the best and enjoy that beautiful car :)

[@alexandrecouture2462]

@@V8.77 Thank you!

[@moi01887]

What is it with British engines and head studs? Years ago I owned a Saab 99 with a Triumph-made engine. The standard procedure to R&R the head on those engines was to use chisels, prybars, wedges, heat, and whatever else was needed to lift the head up about 3/8", at which time you'd use a hacksaw blade to cut off all the studs. It was assumed you'd destroy the head removing it, so one brand-new head and a bunch of studs later, you could put the engine back together!

[@Hamish-y2c]

Studs are used because they clamp better, race engine’s use studs. If you look aChevy race engines have studs, unfortunately after years of being together this happens especially when aluminum is involved.

[@georgerobartes2008]

The engine was originally designed as a 4 cam multivalve short stroke race engine by Sir William Lyons inspired by the Rolls Royce Merlin .

[@ColinMill1]

I suspect a lot of these issues are down to a lack of correct maintenance over the years. Jaguar specified 60% Blucol antifreeze in the cooling system. Many fell into the hands of people who wouldn't be up for the cost of fluid changes at the specified frequency and quality. I pulled the head off an XJ6 that was about 19 years old at the time but well maintained and it was not a major problem.

[@MrPabsUk]

@@ColinMill1 That's exactly the issue, antifreeze contains corrosion inhibitors, when used & changed correctly, these studs aren't an issue, the problem is, few people, especially Americans it seems, bother with scheduled maintenance, & this is the result. These lazy owners then spend the rest of their lives telling everyone their "horrific Jaguar (or various other manufacturers) experience" & it becomes folklore.. Same with Lucas electronics, its all way overblown.

[@as3cs3]

it's not just the corrosion on the studs that makes them hard to get off it's more that the studs aren't 100% concentric with the bores they run in. It's sideways force from the studs which makes them bind as the head goes up.

[@tomsawyer9637]

You think jaguar was using foresight with those removable cam tray type sections? It'd be convient to get a new "tray" instead of a cylinder head. Also reduces the need to remove the cylinder head for certain services. Cool video man.

[@aygwm]

Foresight is not the word I would use when I see this engine

[@Hamish-y2c]

What is your speciality. @@aygwm

[@TassieLorenzo]

There's a design video called "The Jaguar V12 Engine" where the engineers are interviewed in 1971. The multi-part head is designed to simplify the casting and made it easier to clean the sand out of the casting. With a conventional cylinder head, it can be tricky to get the sand out of the intricate pockets of the water jackets in the head from the sand cores (as well as being tricky to make sure the sand cores that form the water jackets stay intact and don't move during casting).

[@alexandrecouture2462]

I have a inline-6 Jaguar XJ6 from 1991 and this engine is amazing, built like a tank. The name is AJ6.

[@twinscrollturbo-k5g]

Brilliant engines

[@someidot3699]

fun fact about the Jaguar XJS. they had inboard rear brakes just like the h1 hummer! also something something rear subframe bushings. really interesting to look at if you ever get a chance in person!

[@rennkafer13]

And just like the XK's before them.

[@timmiller2460]

First production use was in the original S type. Went in to Mk10, E Type and XJ6 / XJ12

[@rennkafer13]

@timmiller2460 S type came out the same year as the XKE, 1963... so concurrent.

[@timmiller2460]

@@rennkafer13 Just checking it went E Type, Mk10 then S Type. What was on my mind was that the first test mules were Mk2s but I got mixed up! 🤣

[@christheturdherder9096]

Great video as always! Thanks to WD-40 for sponsoring Charles. They should set you up with a 55 gallon barrel of WD40, or a container full of wd40 big enough to lower an engine down into it.

[@Thomas63r2]

I own a 1976 Jaguar XJ12. Its V12 expired in 1994 at 131,000 miles. It was like $10,000 at that time ($20,000 and higher now) to have a proper rebuild, so it got lumped with a JTR 350 Chevy and TH350 tans. That Jag V12 is an almost 800 lb. engine - my car lost about 400 lbs. weight in the conversion. Its a pretty standard 350, so it made roughly the same power. With the conversion weight loss its acceleration improved and it got better gas mileage. Jaguar people hate my car when they find out it now has a Chevy 350 engine - they refer to it as a lumped car.

[@MickeyMishra]

Dang that almost raises much as a Cummins engine

[@ghostofzuul]

Charles looked at that cylinder head and was like "don't make me angry. you wouldn't like me when i'm angry...." and it popped right off! kudos sir!

[@ronnieboucherthecrystalcraftsm]

i drove a 7 litre crank swapped with fuel injection XJS - wow pulling power - they will rev to 7,000 rpm with a tickle !

[@JimmyJamm]

The front crank pulley was held on by a collet, very much like ones used in routers to fix the bits.

[@scotts9476]

Extra points for using “borked” in a disassembly video! I’ll take the valve covers for wall art 😃

[@mdbryan9525]

I had a E type V12 1972 vintage. I was going to adjust the carbs. I read the instructions and said NOPE! Apparently it was more art than science to do that job.

[@johnnyblue4799]

I would like to see a rebuild of that engine.

[@kjellmesch8060]

Not this but still :-) kzbin.info/www/bejne/hGPdmGucn9ynf6M

[@johnnyblue4799]

@@kjellmesch8060 Nice.. thanks!

[@COM70]

Send it to Tom Walkinshaw Racing. Powerful reliable and will make the hairs on the back of your neck stand up with the sound.

[@rohanhodges6135]

I am an old time english engine fan especially the Lotus Twincam and 907 engines but recently have got into VW. Really enjoyed all your vidoes on R32 engines as I work on my sons Mk4. I have a V8 TDI Touareg but those engines are not in the US so unlikely you can pull one of therm down but a V10 TDI would be nice as its a very unusual design for a road car and more based on the VAG Le Mans racing diesels design

[@mooferoo]

That engine is so big it almost looks like it's been digitally enlarged in post-process.

[@TechX1320]

would love to see a mechanic i actually have faith and trust in on youtube teardown either the 1.4 from a 500 turbo/abarth or a 1.4 turbo from the chevy sonic/cruze. My abarth hasn't ran right for nearly 6 months now and no one can figure it out.

[@petermoto409]

Parts like the power steering pump and A/C compressor are GM AC-Delco parts.

[@ChillisAutomotive]

Im glad im not the only one who looks at old parts and thinks of all the things i could make out of them. I have a valvetronic eccentric shaft sitting and waiting for me to come up with an idea.

[@LieutenantNuggets]

Bit of a weird one for people in North America but here in Australia we have cars called Ford Falcons and most of them will have an Engine called "Barra" they range from an Inline 6 to a V8. They are big, reliable and can pump out a lot of power.

[@michaelcowell5046]

Loving watching your videos. Definitely becoming a regular viewer

[@chuckschillingvideos]

5:10 I don't think the water pump is secured by quite enough bolts.

[@HumbleMechanic]

Hahah they prob still leak

[@stratonarrow]

Man what a shame! Hearing it fail must have been such a bad feeling. Great video though!

[@Robby94LS]

I enjoy watching all tear downs, but I'd really be interested in a W 12, or any W!

[@quick04sti]

Just recently did one...

[@uscmack5300]

Id love too see him tackel some old Land Rover stuff like 300tdi's and 3.9s, 4.0s, and 4.6s. Supper happy to some Jaguar stuff. Always want to learn more!

[@FrankHeuvelman]

*_"...and the second cylinder head will take way less time to get off because now we know how it's done...."_*

[@c901]

Best part of the video was you winning the stuck head battle at the end!!

[@HumbleMechanic]

Hahha thanks

[@tomremeeus6069]

I am not sure how rare Mazda MX-3's are outside of my country, but I am really interested in their v6 engines. It was then marketed as one of the smallest v6 production engines. I think it's called the Mazda K engine series. You have a few variations of the same engine block, with different displacements and parts. Mazda also engineered a VVT variant. It adjusted the air intake flow dynamically according to the engine's speed, instead of adjusting the valves. It would be really cool to see you take it apart and give your honest opinion!

[@brysonshires9742]

I don't believe the kl's got vvt. Only the later duratecs, right?

[@brysonshires9742]

Check out the suicide mx3 if you haven't already

[@tomremeeus6069]

​@@brysonshires9742 Yes, you are correct! I think my message is a bit vague, lol. I meant that the K engines use a "Variable Resonance Induction System" (VRIS) instead of a VVT system :P

[@brysonshires9742]

@@tomremeeus6069 the vris in my probe works perfectly

[@alanchan1772]

I was a jaguar mechanic I love these v-12 motors.job security at dealership pay check every week.

[@xCertifieDPerVx]

The fact it has semi-beefy double row timing chain almost makes me like it..

[@pllinc7014]

In 85 I worked at a Jag dealer, remember a PDI taking over a week to complete. This car was an electrical nightmare. Turns out the cell phone bracket, an after thought, had been screwed right into the main wiring harness causing all kinds of cross connections. Yes, Lucas, the prince of darkness! Lucas makes refrigerator and that is the reason the Brits like warm beer!

[@colinstickland3130]

Yes a BL Jag. I have a ford jaag a 94 XJ40 no problems

[@harrytinker2328]

That is a cool looking valve cover!

[@pkt1213]

Lucas...prince of darkness. The reason Brits drink warm beer.

[@joannrosario9373]

Your a asshole to..

[@nickayivor8432]

Happy New Year, HumbleMechanic 👍 From Nick Ayivor from London England UK 🇬🇧 20:39pm

[@Wulf573]

Ahh you gotta love these fine engines from the JAAAAAAAAGG ifykyk

[@VortexGarage]

Having done the injector hoses on these, that stud is from an injector hold down plate. The stud goes into the intake manifold and when removing the nuts some of the studs can back out. Also prior work on these cars can mean over tightened studs that pull threads out of the aluminum manifold. Had to helicoil two of em. But 24 of these in total, along with a vast mess of other bits. I would say that each injector uses two of these for a hold down and one missing would be obvious and also may cause the injector to not fully seat. My guess as a result is it was lost, fell into a hidden area in the valley and down an open plug hole. As the engine bay in an xjs can be a massive black hole for small bits that are dropped, im betting a 1/4-20 bolt was substituted after the stud was not found. Owner thought it must have fallen into the engine bay but alas it went into an open plug hole. Definitely tough deal on that one! These engines really are good at hiding dropped hardware and the spark plugs are right near the injectors in the V. So good lesson for anyone in future, dont leave plugs out on these cars any longer than needed, and account for all dropped bits in the V. And in worst case, bore scope is your best friend. For the matter, a bit of luck, strong flexible magnet and some experience with boardwalk claw games and you may win a very frightening fishing expedition.

[@diemosel]

Love Love Love this! I just bought a V12 XJS and now I know what she looks like inside - question though, was the injector service related to the head bolt failure or just a coincidence? Did I miss that part of the video perhaps?

[@HumbleMechanic]

I think they broke a stud and it fell during maintenance.

[@alexandrecouture2462]

Hi! If you have a Jag V12, the channel to take a look is Living with a Classic. Adam is the guy for anything Jag V12.

[@andrewfryc5602]

Brought back memories working on Jags in the late 80s and early 90s in Australia. Common problem with the heads corroding onto the block. W10 engine would be good to see torn down.

[@Hakiri27]

That pulley was hilarious, Expecting a minute or two of impacting Reality it came out instantly lol

[@peterrowland2750]

Note how the tapered collet allowed the pulley to come off easily. I was replacing the timing chain and guides on a 1999 X308 Jaguar. The so-called engineer who designed the motor decided to buck the trend of the last 100 years, and put the tapered collet around the other way. It would not shift, despite ever more violent applications of force and heat. Unable to use a puller on the harmonic balancer, because said idiot engineer put the puller holes on the outside of the rubber damper ring, so pulling just stretched the rubber. Finally I drilled out the locating key and it came off.

[@The_Redkween]

I don’t have any Jag horror stories but I have many Lucas horror stories. I had a 1972 TR-6. Lucas-nightmare. Never seen electrical connectors where it was basically a cup and a button held together with a rubber boot…….which of course dry rotted

[@Theshitboxtech]

Im so glad i turned down that job at the classic jag shop

[@markwallis7199]

Can't blame us Brits for the US made Harrison A/C compressor. We didn't even have A/C back then and bought it from you.

[@HumbleMechanic]

Hahahah fair point

[@bunky060171]

That Harrison A-6 compressor will make snow. GM used them for decades. (Harrison/Frigidaire - both owned by GM at one point)

[@evandarling699]

I used to make good money as a tech with Jaguar...I lived those cars! Water pump paid like 14 hours! Head studs were a party too!

[@HumbleMechanic]

Hell yea!!

[@kennethtalbott2233]

if you remove anymore jag heads, put plasticine around the studs forming a well and pour alloy wheel cleaner in and leave for a few days. you can also get a head removing tool although i made mine.

[@HumbleMechanic]

That’s a good idea!

[@kennethtalbott2233]

@@HumbleMechanic it's that good, it works. i read it somewhere that an aircraft tech recommended doing it. worked a treat for me.

[@tbix1963]

One channel I enjoy watching on occasion is the precision transmission shop from Amarillo Texas, he takes down the automatic transmissions and points out the failure spots. Might be interesting to see a comparison to a VW front wheel drive automatic. Nice job on the v12.

[@dubsydubs5234]

The heads always seize on, you'd be amazed at how seized they can be. we've had them so stuck that after a few days of lube, an engine hoist and car lift chained on you get a few mm of gap then had to cut the studs.

[@HumbleMechanic]

A buddy called me and said he would soak them, loosen the nuts, rattle the studs with an air hammer, then leave it overnight with the engine hoist like you mentioned.

[@davidclarke7728]

I owned a v12 XJS for 16 years and toured all over Europe, never ever let me down , only part replaced was high pressure steering hose on the car. Regularly maintained by Jaguar

[@Hamish-y2c]

I drove mine every day No problems.

[@ej1civic76]

Awesome video! That engine was pretty stout. Next teardown should be an ls engine

[@Rich77UK]

I love that BL called the 5.3 V12 HE (high efficiency)...an old acquaintance had one of these in an XJS...8 mpg (real gallons) on a gentle cruise. Thats 6.6 US MPG!!,

[@johnlucala1532]

V12 J, that's huge and powerful engine, Charles...

[@blakebucknall4008]

14:04 On Japanese trucks (as far as I know because it’s all I work on). We call these a Cam Box. You can replace these completed with a cam without having to remove / replace the head because it is it’s own piece as some engines, the cam journals are part of the head. Saves a lot of time should anything cam or cam bearings fail.

[@ragnarironspear1791]

Always enjoy your videos 👍🏻👍🏻🇬🇧

[@acvn-hg9gy]

Have you ever done a rotary teardown on the channel? Would e sick. What about the 1.8(?) V6 from mazda. A nostalgic one for me would be the big ass freaking v8 petrol engine my dad had in his 80's land rover defender 110. Man that thing was impressive to me. Of only we had it now, i could have helped him work in it.

[@dannyrivas5125]

It just me i would like to see older engines get rebuilt modern parts and technology and techniques to see what they can do . Like would it make more reliable and efficient make more power and how clean and cool it would look like that just me i don't know if any one fill the same way

[@jn7154]

Not a horror story from working on a jag but a horror story involving a jag. I'm from Northern Maine and I spent a summer in Texas with family during college. The family car was a 2008ish jag xj and shortly after I arrived, the AC stopped working. I went from a very cold Maine winter/spring to a very hot summer in Texas. Nearly every day was a record breaking high temp

[@denniss5512]

Edison invented the light bulb. Lucas put it out. The curse of all things British, especially motorcycles with all that wiring inside the headlight bucket. The v-12 water pump is a known problem. Inside that Lucas module is a GM HEi module. A simple fix. Corroded water passages lead to head gasketr failure. The flat head design leads much to be desired performance wise.

[@kelvinmoors8908]

That was a great break down.you mentioned that's a whole aluminum engine I was wondering why do they make some engines with a cast iron engine block but has a aluminum cylinder head bolted to them.

[@marco7563]

I've taken apart a couple of these engines and have never had a head come off that easy lol

[@HumbleMechanic]

Hahha a buddy of mine called me yesterday. Former jag tech and was laughing at me about it. He gave me some too little too late tips 🤣

[@jamesh9678]

I’m impressed it had head studs on it. Neat engine! Wouldn’t want to work on it tho

[@HumbleMechanic]

Hahah me too!!!

[@jonathanwaugh1433]

😂 thats why you use the Jaguar v12 cylinder head removal device... Its a plate you attach to the head and camshaft assembly and it slowly jacks the head off the block...😮😅

[@scotturich]

When you’re having a bad day just go out and beat on the Jag motor 😂

[@UselessBuilds]

The cylinder head comes apart in 2 pieces allowing you to replace the cam bearings without replacing the head. :) BMW did this also in all the m54 motors, also I have a motorcycle engine you can have if you want to pick it up in charlotte next time you are here. Just ask Paul for my contact info

[@Krisemann]

Can definitely relate to not being able to leave things alone if they bug me! Although I am sad to see a good V12 go. They're not exactly getting more common in this day and age of environmental regulations...

[@nsb1524]

I like your Videos So much, I remember Aaron kaufman, when you rectify problems. Thanks.

[@miket1291]

I would like to see you rebuild a Miata 1.8. Nothing exciting about this engine. I have to do one this summer and would like to see how you would do it. Nice job.

[@markprior6009]

Hey Charles, let’s go bigger!! How about a truck engine tear down? From a massive fan in the UK 🇬🇧. Also I drive a 2019 SEAT Leon ST 190ps 2litre turbo. Is there a video anywhere on your channel where you have worked on this engine type? I’m very interested to see how it all works. All the best 👍🏼

[@aceandgary3414]

Lucas refrigerators: why the Brits drink warm beer.

[@twinscrollturbo-k5g]

Brown ale is cellar temperature no warm 😂😂, larger is cold, and lucas do not make fridges or at least I have never seen one anywhere 😂😂

[@joshjones3408]

Cam shaft would be a cool shifter handle..in a semi if they weren't to heavy probably borderline to heavy

[@epistte]

I'm very familiar with Lucas electronics. A friend had a MG-TF and a XKE. He got both running and flipped them because they weren't worth the effort of doing more. I bought his decals for his toolbox that said "Lucas invented the intermittent wiper" and "Lucas switch-dim, flicker and off".

[@Hamish-y2c]

I have met Americans who can’t fix Delco either.

[@AnthonyPettitt-b4y]

Lucas is the prince of darkness for electrical systems The three-position Lucas switch--DIM, FLICKER and OFF. The other three switch settings--SMOKE, SMOLDER and IGNITE.

[@KyleFajardo-u8y]

The engine is incredibly large💪

[@john1703]

So it's Lucas' fault that someone smote the distributor cap? Do remember that a 7 litre version of that engine won at Le Mans in both 1988 and 1990.

[@COM70]

5:22 wrong coolant (no coolant) for an aluminium block/head. Also engine and ancillaries worth a lot in parts.

[@chartersclose]

The boonet insulation stuck on underside of bonnet used to fall off and jam the throttle open

[@drdiabeetus3061]

If you haven’t done one already. I would love to see a tear down on a B5 S4 2.7L Biturbo V6. These get a lot of flack, I would love to know why.

[@brokensmilephoto]

Love those old body style Jags, and now fully understand why so many people were putting 5.0L Mustang engines in them. Maybe if I ever decide to punish my self enough, I'll stick to the XJ6 of that era. lol

[@alexandrecouture2462]

Many put Chevy small block 350 in these, because they already used a GM automatic transmission. It was mostly because many people didn't had the knowledge to fix the V12.

[@DaveWithMS]

I love the WD-40 dry lube...

[@V10PDTDI]

Charles what is the problem with the VW 1.4 L engine you mentioned about bolts loosening ? Never heard that before and I work on European cars .

[@HumbleMechanic]

The bolts in the cam variaters back out.