Hi! I have 3 v12 Jaguars and one of them is a 87 XJS. I used this video to tackle my cooling system. It took me 3 days but it runs perfect and very cool now. I didn’t replace the original radiator but had it reconditioned. THANK YOU! very informative and concise!
Hi, I just took my E-Type V-12 engine apart because there was also a lot of dirt and a clicking noise which I had blamed on valve gap. What it actually was, I had 4 cylinders with broken piston rings. On the way of disassembly I found more than 2 cups of sand and 11 thumbsize pieces of neopren hose neatly deposited around the rear cylinders. The ignition was converted to another electronic system but they never installed a ballast resistor so the RPM reached its limit around 3500RPM. There was a lot more but that would fill a small book. Amazing was that the car was still driving good (at least up to the RPM limit) Conclusion: it was more work than anticipated but when I am done I know it is like new again ready for the next 100k miles. Wish you all the luck and check the compression (leak down test) and use a thermo-camera (Flir 1 Pro for the iPhone does a good job) to see how the heat distribution is around the engine (stuck thermostat .... there are two so one bad one can be overlooked easily) Greetings Bernhard
Bernhard List very truly appreciated Mr. Bernhard, my biggest fear is a catastrophic failure of the glorious V12. It’s too good an engine to see waste away. I will download the app and begin to take a look and upload my readings in the coming days. Again thank you very much!
Excellent video! I definately agree that the topside and possibly the front while you have access should be thoroughly cleaned before you proceed to the next step. Slow but steady wins the race because if any debris falls into a spark plug hole you're done. Game over. Not to mention that for these V12's to stay cool, they need to be clean or the sludge/dirt acts like an insulator and heat cannot escape. Not sure why you wouldn't want to keep your cruise control present after all the repairs. That's a nice feature for highway cruising. Also, definitely keep the smog pump on the engine. If you ever sell the car in the future, people want originality when it comes to these cars. Not to mention those same people get scared off if they think the car has been altered and might not pass emissions testing.
Kenneth White that’s my biggest fear right now sir. I don’t want any small mishaps like that washer falling in there. I have since removed it thankfully. I’m thinking about buying a small air compressor and soaking the wells in brake cleaner, blowing out all of it to the best of my abilities. Repeating it multiple times. Now we’re entering the danger zone you can say. Eh, the cruise control bellow up top was an eye sore and didn’t work. I would have to check control modules and remove interior trim panels and begin diagnosing it lol. That I have little patience for and all that held it in there was minimal, I thought why not lol. Thanks I’ll keep the smog pump! Solid advice as I went with the original radiator to keep that originality factor. Wish me luck as I delve into the spark plug wells!
You should always replace the rusty holding brackets and any other rusting fixings on an Xjs or they rot away and cause serious damage to the surrounding areas. Also if there's any issue with the cooling system on the V12, do a full chemical flush of the whole system or any gunk build up in the system will negate all the work you've done and cause overheating. It's a false economy not to do it. Otherwise very good video on how to do the job.
Tolly T thank you sir. I got some Tefba coolant filters, and noticed the cooling system was not that neglected with very minimal corrosion. In the winter I back flushed my heater core because my heat was very faint but aside from that it cured the low heat and hasn’t overheated once. :3 thanks for the input.
@@PedrosGarage You're welcome.. I've owned 3 XJS and 3 others in my extended family, so we've been through most problems.. I used to back flush the coolant system every 5-7 thousand miles, and unlike many, never had any overheating problems..
Just bought an 86 that I'm trying to resto mod a little. Mine only has 75k miles and I would love to keep the original engine, just doesn't run, but not sure on how to really beef it up and make it more powerful. Or which parts to use haha. Very complicated engine to understand.
Very nice, well for one, the cars to modify are the PRE HE with the flat cylinder heads, they're good for 300 bhp, and are a preference for modifying.. I know some people that ditch the original engine management syste, and tailor a custom stand alone ECU for their cars and they achieve impressive #'s. www.AJ6Engineering.co.uk is a company in the UK that specializes in everything Jaguar performance, and they may be the only people left that cater to the cats. Check them out..
@@PedrosGarage yea I've looked at all that. I actually bought a BMW v12 from an '01 750li, to swap with the less powerful v12 in there haha. Just need to get it swapped when I get the funds. I bought the car up in Maryland, I live in Fredericksburg. Luckily the car was in great shape body wise.
@@purelofisounds4587 exceptional! That’s going to make for an interesting build. Though the BMW V12 is a bit more sophisticated computer wise, it will be a worth while pursuit. I’m also in Maryland too, small world!
My car has been sitting for 5 to 10 years in a orchard and I have a mouse nest under the cruise control bellow,at least I hope its a mouse,what a mess they leave .
good luck bringing yours back to par! It won't be easy but very worth it. Please replace all fuel lines, the rubber perishes, especially on the return and feed.. Good luck and if you need anything please let me know. Also join the Facebook forums, the Jaguar community is one of the most friendly and helpful car communities out there. Cheers!
@@PedrosGarage Thanks Pedro for the info I have a long way to go but having said that its a learning curve and while I have an XJ8 and XJ6 these V12 s are an interesting change, having said that I was amazed how bad a car can get let uncovered and on grass/soil as the other Jags were both let outside on tarmac and one had a cover but you can tell which one it was.
I have a 92 v12 that is over heatings and i cant figure out what it is. And my big radiator fan is blowing hot air into my toward the engine. And it gets stuck on zero rpms and goes back normal when it feels like it. Any tips?
Regarding your overheating condition... check your two thermostats.. see if they're stuck open or stuck closed.. Check that between the radiator and AC condenser there isn't debris preventing the air to pass through. Also, has your cooling system been bled properly? Very important that the system is evacuated of all air. As far as your idle jumping up and down from what I gather, your car is lurching. and this can be casued by a number of things. But check your AAV, the AAV is located on the Driver side engine by the firewall, it's a valve the opens and closes allowing more or less air to get in during cold start. Try this, turn on the car, take your hand cover the intake trumpet on the driver side, does your idel settle down? Then your AAV is the cause. Let me know how you fair. Good luck sir.
im having the same problem with a bunch of dirt and crap in my spark plug holes making it impossible to get the plugs out without it falling it, did you use a vacuum and pick at it or what?
Gavin Willoughby Took some brake cleaner into each well, then I took some compressed air into each hole and repeated. I didn’t use any tools, just solutions. I also let some Pb blaster soak in each well for 2 days before starting to clean and remove the grime. Take your time they’ll all get clean.
Hi! I have 3 v12 Jaguars and one of them is a 87 XJS. I used this video to tackle my cooling system. It took me 3 days but it runs perfect and very cool now. I didn’t replace the original radiator but had it reconditioned. THANK YOU! very informative and concise!
Thanks for watching Eric, as always we are happy to have you here. 😎
Hi, I just took my E-Type V-12 engine apart because there was also a lot of dirt and a clicking noise which I had blamed on valve gap. What it actually was, I had 4 cylinders with broken piston rings. On the way of disassembly I found more than 2 cups of sand and 11 thumbsize pieces of neopren hose neatly deposited around the rear cylinders. The ignition was converted to another electronic system but they never installed a ballast resistor so the RPM reached its limit around 3500RPM. There was a lot more but that would fill a small book. Amazing was that the car was still driving good (at least up to the RPM limit)
Conclusion: it was more work than anticipated but when I am done I know it is like new again ready for the next 100k miles.
Wish you all the luck and check the compression (leak down test) and use a thermo-camera (Flir 1 Pro for the iPhone does a good job) to see how the heat distribution is around the engine (stuck thermostat .... there are two so one bad one can be overlooked easily)
Greetings Bernhard
Bernhard List very truly appreciated Mr. Bernhard, my biggest fear is a catastrophic failure of the glorious V12. It’s too good an engine to see waste away. I will download the app and begin to take a look and upload my readings in the coming days. Again thank you very much!
Excellent video! I definately agree that the topside and possibly the front while you have access should be thoroughly cleaned before you proceed to the next step. Slow but steady wins the race because if any debris falls into a spark plug hole you're done. Game over. Not to mention that for these V12's to stay cool, they need to be clean or the sludge/dirt acts like an insulator and heat cannot escape. Not sure why you wouldn't want to keep your cruise control present after all the repairs. That's a nice feature for highway cruising. Also, definitely keep the smog pump on the engine. If you ever sell the car in the future, people want originality when it comes to these cars. Not to mention those same people get scared off if they think the car has been altered and might not pass emissions testing.
Kenneth White that’s my biggest fear right now sir. I don’t want any small mishaps like that washer falling in there. I have since removed it thankfully. I’m thinking about buying a small air compressor and soaking the wells in brake cleaner, blowing out all of it to the best of my abilities. Repeating it multiple times. Now we’re entering the danger zone you can say.
Eh, the cruise control bellow up top was an eye sore and didn’t work. I would have to check control modules and remove interior trim panels and begin diagnosing it lol. That I have little patience for and all that held it in there was minimal, I thought why not lol.
Thanks I’ll keep the smog pump! Solid advice as I went with the original radiator to keep that originality factor. Wish me luck as I delve into the spark plug wells!
You should always replace the rusty holding brackets and any other rusting fixings on an Xjs or they rot away and cause serious damage to the surrounding areas. Also if there's any issue with the cooling system on the V12, do a full chemical flush of the whole system or any gunk build up in the system will negate all the work you've done and cause overheating. It's a false economy not to do it. Otherwise very good video on how to do the job.
Tolly T thank you sir. I got some Tefba coolant filters, and noticed the cooling system was not that neglected with very minimal corrosion. In the winter I back flushed my heater core because my heat was very faint but aside from that it cured the low heat and hasn’t overheated once. :3 thanks for the input.
@@PedrosGarage You're welcome.. I've owned 3 XJS and 3 others in my extended family, so we've been through most problems.. I used to back flush the coolant system every 5-7 thousand miles, and unlike many, never had any overheating problems..
Just bought an 86 that I'm trying to resto mod a little. Mine only has 75k miles and I would love to keep the original engine, just doesn't run, but not sure on how to really beef it up and make it more powerful. Or which parts to use haha. Very complicated engine to understand.
Very nice, well for one, the cars to modify are the PRE HE with the flat cylinder heads, they're good for 300 bhp, and are a preference for modifying..
I know some people that ditch the original engine management syste, and tailor a custom stand alone ECU for their cars and they achieve impressive #'s.
www.AJ6Engineering.co.uk is a company in the UK that specializes in everything Jaguar performance, and they may be the only people left that cater to the cats. Check them out..
@@PedrosGarage yea I've looked at all that. I actually bought a BMW v12 from an '01 750li, to swap with the less powerful v12 in there haha. Just need to get it swapped when I get the funds. I bought the car up in Maryland, I live in Fredericksburg. Luckily the car was in great shape body wise.
@@purelofisounds4587 exceptional! That’s going to make for an interesting build. Though the BMW V12 is a bit more sophisticated computer wise, it will be a worth while pursuit. I’m also in Maryland too, small world!
@@PedrosGarage really? I picked the car up in Indian Head. I'm in Virginia
@@purelofisounds4587 how went the swap???
My car has been sitting for 5 to 10 years in a orchard and I have a mouse nest under the cruise control bellow,at least I hope its a mouse,what a mess they leave .
good luck bringing yours back to par! It won't be easy but very worth it.
Please replace all fuel lines, the rubber perishes, especially on the return and feed.. Good luck and if you need anything please let me know. Also join the Facebook forums, the Jaguar community is one of the most friendly and helpful car communities out there. Cheers!
@@PedrosGarage Thanks Pedro for the info I have a long way to go but having said that its a learning curve and while I have an XJ8 and XJ6 these V12 s are an interesting change, having said that I was amazed how bad a car can get let uncovered and on grass/soil as the other Jags were both let outside on tarmac and one had a cover but you can tell which one it was.
I have a 92 v12 that is over heatings and i cant figure out what it is. And my big radiator fan is blowing hot air into my toward the engine. And it gets stuck on zero rpms and goes back normal when it feels like it. Any tips?
Regarding your overheating condition...
check your two thermostats.. see if they're stuck open or stuck closed..
Check that between the radiator and AC condenser there isn't debris preventing the air to pass through.
Also, has your cooling system been bled properly? Very important that the system is evacuated of all air.
As far as your idle jumping up and down from what I gather, your car is lurching. and this can be casued by a number of things. But check your AAV, the AAV is located on the Driver side engine by the firewall, it's a valve the opens and closes allowing more or less air to get in during cold start.
Try this, turn on the car, take your hand cover the intake trumpet on the driver side, does your idel settle down? Then your AAV is the cause. Let me know how you fair. Good luck sir.
im having the same problem with a bunch of dirt and crap in my spark plug holes making it impossible to get the plugs out without it falling it, did you use a vacuum and pick at it or what?
Gavin Willoughby Took some brake cleaner into each well, then I took some compressed air into each hole and repeated. I didn’t use any tools, just solutions.
I also let some Pb blaster soak in each well for 2 days before starting to clean and remove the grime. Take your time they’ll all get clean.