Broken Jaguar Engine Update and Closer Look
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- Опубліковано 6 вер 2024
- A few weeks ago I noticed a head gasket leak on my daily driver 1975 Jaguar XJ6. I have now take some time to look it over and there are some good news. Here's a closer look at the broken Jaguar engine and an update.
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#brokenengine #headgaset #enginefailure
I really hope the engine will hold up now but I will keep a close eye on it. Thank you for all your suggestions and support towards this car!
Are you excited about the XJ6 getting a new interior?
Yes! I would love to see that! 👍
Great! 😊
Stop overthinking it. Drive it , but keep your eye on the coolant level, i doubt it will suddenly let you down. You will drive yourself mad otherwise .
It’s going back into regular service now
Adam, your engine is OK,don't worry about it. All the tests you've done indicate it's functioning properly, just continue
to do regular service on it. These are good engines,you just have to get to know how to maintain them correctly which
sadly a lot of them have been ruined due to poor maintenance. This is especially true with the V12, I've seen a lot of
them discarded simply due to lack of knowledge of maintaining them. I've worked on these cars when they were a few
years old,so I remember them when they were brand new. have a nice day,stay safe you and your family keep up the good work.
I lived in Almhult for 3 years , and the scenery in Sweden is superb ,
All there is to do now is drive and enjoy Adam. It may run for years or it may blow tomorrow. There’s no more need to worry. Maybe stay within an hour of home for the first while.
Ah, the mysteries of "Living With A Classic" ... I suppose the lesson learned is to keep trying !
Yes never give up. Sometimes trying everything again can work
I have no experience with the XK engine and I have not followed your whole series. I have been turning wrenches for more than 40 years, and when rebuilding engines I always replace all the cylinder head fasteners studs and nuts with high quality new. I usually use ARP fasteners even on standard engines that will never see competitive racing use. Doesn’t matter how nice the old fasteners look, always use new fasteners. It’s an expense that assures me that I won’t see an engine return for reasons of fastener unreliability. I always torque the head bolts and nuts twice, and use any fastener lubricant as specified. I always run the engine through several thermal cycles and again check the fastener torque. Best wishes that your engine stays on the good side!
Touching wood with crossed fingers here. I gues when you have nothing to lose, anything is worth a try. Great news.
Yes, it follows that if the head was skimmed, it is now lower down (obviously by a tiny amount) on the bolts, so a bit extra compensation on the torque wrench setting probably helps.
Wow, this is encouraging, I hope that it continues to run well for you Adam.
Thanks Bob! I hope so too
Ive had good luck with block seal
The combo of the sealer and the re torque may have done the job 👍👍👍
With all your hard work, you deserve some good luck and things working out well. Glad the XJ6 is running good.
The interior fix up will really make it great. Still like the XJ40 also. Nice that you can move on now. Saving replacing
a engine is a huge deal, of time and money. I am glad for you. Things are looking up.
If you have changed the HG and did a good job (plaining of the head, new gasket, good studs, correct torqueing) and you haven't been leaning on the engine hard it is unlikely that the HG is the problem.
Could be that the re-torqueing has pushed the cilinder liners tighter down in the block. That might have sealed up the cooling system.
Anyway, good to see that the engine seems to be behaving like it should.
Adam, this video made me smile! Congratulations on getting the XJ on the road again!
Just a thought, I had an XJ12 TWR with a 6.0 ltr engine. I had problems with water getting into the fuel tanks... From memory the right hand side... If you are getting water in your petrol, in turn it's getting sucked up into the engine. It will run lumpy and will steam more in its exhaust.... Just an idea... Keep up the good work...
Hi Adam, I'm been looking to buy an XJ12 and watching your channel is really helping me to know what to look for. Keep up the good work. Thanks from New Zealand.
That's the thing with living with a classic, sometimes a break and a thinking session, you come up with a possible solution. In this case it worked! Well done Adam. Can't wait for those dreadful saggy headrests to go🔧👍😁
when i started in the garage trade 53yr. ago the mechanics that taught me always did 2 clicks of torque wrench as they didn't trust the first click i asked wont you over torque or do damage to head or block , or stretch the bolts , as they said it's set for a certain torque you can click it all day long , it will not go over the setting you.ve set it to.
Hi Adam,..that sounds like "great news".
I'm really happy to know that the "problem" seemed to have been "fixed".
I heard from other people that have used that "head fixer in a bottle" in the past, is that you have to GIVE IT TIME, and that it will eventually do it's work with the continued use and running of the engine.
Has you mentioned Adam, you will keep an eye on it and monitor it's results has you use the car.
Thanks for another great video and I hope also that the engine will keep working well with no issues.
I see you've been very thorough with your checks; torque, gasket and surface cleanliness, with the hot & cold engine. From my view, it idles very smoothly, and when you conducted the compression test, which is at cranking speed, variance may well have been from new. In the Chrysler Valiant engines ('Slant' 6, 225 cu. in.) the service manual gives a 'specification' for a compression test, a value between 110 and 140 p.s.i. as an acceptable reading. I don't know what is specified for the Jaguar, but regular monitoring & maintenance would see a good few more miles and years of service with that engine.. Good work there..
Yeahhhh !! Nothing better then a small miracle like that when you've lost hope !!
It felt great the last time I tested it and noticed no more gases in the cooling system
@@LivingWithAClassic Me, I'm waiting on my 88 xj12 body/paint job to be done, I have the oil pressure gauge to fix after that, she should be ready to go by the end of Winter here.
Hi jaguar used to recommend a product called bars leaks regardless of milage.
Sweeeet, dealing with old cars is a labor of love and patience, you deserve success...
Good result.
It seems to be running ok, just keep an eye on it, check oil and water regularly ( you can see when coolant gets in with the oil ) and keep driving it.
I would always be dubious about those repair in a can products, they are probably good to get you out of trouble short term, but as a long term repair, NO!
Also this car would be from the troubled with ''BL'' the big merger and trade unions, Jaguars and others suffered build quality issues.
I know a man who has a lot of experience with Jaguars of all models, he said he would not touch an 1980,s built Jaguar due to the build quality issues.
Glad to hear the engine has settled down and appears to be behaving itself.
100 psi in your #2 cylinder is not normal. the average of the other cylinders is 143, 100 psi is along way off from that. question is now is it bottom end or top end. drop some oil down #2 cylinder and see if it improves. if so you have a piston ring problem. if no change. then you have a burnt valve problem. ( i know the head was checked at the machine shop so.........)
i think you need to use a higher quality gasket. i have seen this before but not in a jaguar but a rover. we replaced the gasket twice with the same gasket but on the third time we used a high end gasket and the problem never happened again.
Hello. Love the video's. Just sharing a view, I was brought up on the school of thought that when you re-torque head bolts, you always back off 1/4 turn 1st. This is what I have always done if the manual says it or not but I am by no means a mechanic, more an enthusiastic DIY'er with many years experience and engine/head rebuilds on my own cars under my belt. I have experimented and tried re-torqueing without the 1/4 turn back off and found the bolts do not move on re-torque but with the 1/4 turn back off, they always tighten considerably. I have only re-torqued once after 1500 miles post re-build. This is my experience, but like I say, I am not a pro.
Looking forward to the interior news. Hoping to do my XJ's interior this summer.
Enjoy your exploits, good job
it's a miracle!
Glad you seemed to have sorted it , 🤞 it holds out . I like that XJ6 the best out of all your cars , I love an underdog . I daily drive mine , after all a car is meant to be driven . Thanks for the download . You and Mr HubNut keep me sane .
It’s not smoke, it’s condensation or, if it’s leaking, it’s steam.
It’s just some condensation now which is normal. It was smoke before
Really enjoying this from Thailand, Adam! We learn so much when you keep trying to understand what is going on and especially when you get this close to a conclusion.
Brilliant news great job Adam the XJ6 fights on for another day ☝🏻👌🏻👍🏻
really pleased with recent review looks like head retorque did the trick .you deserve some good news with all your perseverance well done .
That’s great news, I was really rooting for the XJ. It could have been a combination of the cold weather and just needing to re-torque it once more that made it act up. Don’t be surprised if you may need to torque the head again after a few months.
Hi Adam . Well if it ain't broke don't mend it ! As they say. Fingers crossed .
Wow! Fingers crossed let's hope you've saved that engine. Well done Adam. Look forward to seeing your work on the interior.
That's good news
Thanks!
Where did all the snow go?...
Head bolt stretch? Did you use new ones last rebuild? Combination of that and the sealer? If the compression wanders, wouldn't that indicate broke rings? Questions, questions
You look much better driving the XJ40, why not put this one in the collection and use the XJ40 as your daily driver? It would be more interesting to look at, and we can watch you fix the headlining. Have you thought of injecting silicone through the fabric using a hypodermic and pushing and holding it up in a few places? Just some ideas, love your program.
If the antifreeze tastes sweet you have a sweet engine . Take it for a long run ,short trips are no good for any car .... STAY SAFE 🇬🇧🇬🇧👍👍🔧🔧 Especially a JAG!!!!
It will go out on a long run shortly. Thanks for watching 😊
Pressure test it - perhaps it has a crack, have you tested the block for straightness or just the head?
Glad to see the XJ6 up & running again! Thinking maybe the head retorque did the trick myself.
Keep up the excellent content, I look forward to these videos!
Thanks Mark!
Great news! I am happy you didn't give up!
Thank you!
I've just bought a 1975 Sovereign with a broken engine. The owner says it has a stripped head bolt.
Should be interesting to try an fix, but I've got a 350ci Chevy as a back up if I cant fix it.
You'll have the Jaguar Police after you shortly!
As to the low compression it could just be a sticking compression ring. Drive it like you stole it and it may free up if not you are no worse off.
And there was me thinking cylinder 1 was at the front (timing chain end) and 6 was at the bulk head end. Enjoyed the video though.
Jaguar XK engines are numbered backwards. One of their many quirks
@@LivingWithAClassic Just to add a touch more confusion. Good old British classics 👍
Great!! I like this car.
You could always run a leak-down test on cylinder 2 to hear where air escapes (block / intake /exhaust ) adjacent cylinder / bubbles in coolant (head). Something explains the #2 low compression. Anything but leaking to coolant is livable. Is the current gasket an MLS one?
Hi, You have even got me thinking of buying a Jaguar
Looks good fingers firmly crossed for you!
Success !!!! Really nice video Adam, it put a smile on my face. Hope the engine continues to behave!
Great news about the engine so far Adam. Keep up the good work in looking after these beautiful cars! 🇬🇧👍
Thank you! I hope it stays running nicely
Nice one 👍 looks like that's done the trick, fingers crossed for the next few hundred kilometres.
Thanks I hope so too!
Fantastic news!!! Congratulations.
Good news. Keep going.
Adam, i have been enjoying the show. was wondering where you called home before ending up in Sweden. - Bob from Toronto.
Great video! Did you flush the coolant after the head gasket change? I wonder if some exhaust gas was still dissolved in the coolant that came out triggering the test liquid?
Hi Adam thanks for sharing that’s very weird but great news
It is very weird but it seems to be good now. We’ll see if it’s a permanent fix or not
@@LivingWithAClassic I hope so Adam
Have you had your torque wrench calibrated recently? Maybe it is clicking too early? Do you have a beam torque wrench to compare to?
from Fraser, husband of Leslie
Sorry to be a spectre at the feast, but IMHO, the torque-down is unlikely to solve your problem. A 1975 car will have the 7L block with the long studs. These, and the 8L blocks, suffer from cracking of the block between the bores. The blocks have coolant transfer passages machined via the cylinder bores, and thin wall liners are used to close these off, and make the cylinder ready for the pistons and engine assembly. The cast iron at the top between the bores thus forms a narrow bridge and over time, a crack forms in this, and destroys any bridge strength that was there. Sinkage occurs and the head gasket fails, and replacements will continue to fail until the reason is addressed. The cracks cannot be welded, but the cure is to strip the engine to a bare block, machine out the original liners, then machine a recess all round at the top of each bore and insert lipped liners that touch each other and cover the crack. This is a rather expensive operation, so most people don't do it !
How do I know all this ? It happened to me !!!! Except I got lucky and found an uncracked 7l block to build my engine around. That was in 1990 and that car is still running today, although I sold it in 2003, having owned it for 14 years.
Yay! Curious things cars.
Thanks for the content , any chance of a fleet round up ? 5 mins with each car to say this is where we are with it , this is the next step and this is my time line etc
What a great idea! There will be one soon 😊
Lovely!
Try using ultraviolet dye most auto parts stores try taking the engine about 2,000
Is it possible it's simply the engine studs stretching? And now thry've reached their limit on stretch.
Shortly before they break.
They are new so they shouldn’t stretch any more
@@LivingWithAClassic OK, let's hope the quality is what you paid for. Rover managed to supply critical fasteners with suspect quality over the years for V8s.
Yeah I know, you would suppose those issues wouldn't exist, unfortunately...
Did you not know that you need to re torque the head after about a week of use?
This is the 3rd re-torque
maybe it's a good idea to try some oil additives for better compression
I have thought about that too. Any you want me to try?
@@LivingWithAClassicyeah! i tried two cans of "CRC Friction Guard" because i have a low compression on my number 2 cylinder(fouled spark plug after 3 days of daily driving) on my xk engine, and now no more fouled spark plug after many weeks.
Is it possible that something got stuck on the #2 exhaust valve seat, then cleared between the compression checks?
I think so that something could of gotten stuck.
So does this mean there is no fuel injection conversion in the future for this car? You had mentioned that in a previous comment or video if you had to replace the engine.
I wouldn't do that. SU carbs are great.
Not planning on doing that at the moment. My SUs are in great working order. I only planned that if I would fit a complete series 3 engine. Might still do a modified efi system on some car in the future. It would be fun
I have the hubcaps for your car if you need them , may have anything else you need . Lmk , god bless !
That say you should tork the head after about 500 miles
That was done but I guess it needed it one more time. Will see if it loosens up again or not
intake manifold i suspected.leak in to intake.how about that theory?
If it were to continue to use coolant I’d test that next. It doesn’t lose any at the moment. When it lost some before I found exhaust gases in the coolant
Will your return your XJ to the daily driver? It seems like the gremlins in the head may have been slayed by 8kg head torqueing!
I plan on putting it back in daily driver duties after a few small fixes to it. A slight leak from one window and a few other things
@@LivingWithAClassic It will be great to see it back on the road. I'm looking for a similar vintage in the same British Green in the US. Your experience has given me confidence that these are indeed great cars, in fact, classics!
This might be a silly question but do the block studs bottom out in the head nuts not letting the right torque be had on the head ? I expect you have already checked that though.
That was checked when it was assembled. They all have plenty of space before they would bottom out
Maybe it's a case of a bad quality head gasket?
Might be but I purchased a high quality one both times. Maybe the starts in the extreme cold did something to a new gasket
🇬🇧👍
Your xj6 is infested with gremlins.
So this perfectionist is driving an old English Jaguar. His engine blew a headgasket. Het repaired it. It runs fine now. He wants a new engine. I don't get it.Besides that, if you are that perfectionist, buy an old Lexus 400, I would say.