Question about 1994 Jaguar XJ12

1 Answer

Damage heads due to overheating.

I have try to take damage heads out but heads are in there good.
To replace the heads do I need to take engine out?.
Thank You
George

Posted by on

Ad

1 Answer

  • Level 1:

    An expert who has achieved level 1.

    Hot-Shot:

    An expert who has answered 20 questions.

    Corporal:

    An expert that hasĀ over 10 points.

    Mayor:

    An expert whose answer gotĀ voted for 2 times.

  • Contributor
  • 23 Answers

No the heads seize to head studs need lots of antiseize or crc product arround head studs head will require lots of levering to slowly remove good luck very hard to remove

Posted on Apr 20, 2009

Ad

2 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.
Goodluck!

Posted on Jan 02, 2017

Ad
luv2tango
  • 36 Answers

SOURCE: Heads damage. due to overheating.

I have never worked on a 79 Jag, but I have worked on a lot of engines. The advice I would give you is what I would do, and what I would do would be to take the engine out and work on it rather than leave it in the car. Especially a V 12. I know that it is a lot of work removing the engine, but to pull the heads you have to do almost everything needed to remove the engine and then you are not working over the fender of the vehicle where at times is a pretty hard feat in itself, plus you have to worry about the car's finish also. Good luck my friend, you are in for a big job, but I know when you get it done you will feel REALLY good about it.
BTW, what ever you decide, before you start take alot, and I mean alot of pictures that you can put on your computer and blow up. It will be invaluable to you when you are putting the thing back together. It will help you route cables, gas lines, vacuum lines, etc. Take pic's every step of the way. When you remove the radiator take pictures, this will help you see things you can't see when the radiator is in, air filter, battery etc. I can't enphisize it enough.
I hope this helps you in some way.

Posted on Apr 19, 2009

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

2 Answers

I recently changed the head gasket after overheating. The car is not starting and emitting heavy smoke


How hot did the car get before you had to change the head gasket? If the car had extreme heat then it could have damaged the rings. The rings will collapse and allow oil to squeeze past and burn out of the exhaust causing the smoke. Also since the rings are collapsed the vehicle will have no compression hence the no start. First thing is do a compression check.

Apr 27, 2016 | 2001 Mitsubishi Lancer Cedia

1 Answer

If a head gasket has blown in say nissan pulsar 97 what else could go wrong or may need some attention.. tia


Well if you keep driving on a blown head gasket, one of many things could happen.
1. The engine's cylinder heads will eventually get so overheated they will warp (aluminum will do that). When that happens you are going to have to replace the engine altogether.

2. The rods will get thrown and cause seriously internal damage to the engine. In extreme cases can cause a fire and explosion.

3. Your engine could seize up from overheating due to damaged piston rings, burned and bent valves, etc...

In short nothing good will come of driving with a blown head gasket.
Get it fixed ASAP.

Feb 06, 2015 | Nissan Cars & Trucks

1 Answer

1993 Topaz, 4 cylinder, Automatic. Will not shift into third gear. Transmission was fine until the water pump went out and took it to a shop. After the water pump was replaced, white smoke came out...


it is possible that the vacuum line for the transmission actuator was damaged during the head job
check for wiring harness connections not properly put back together

Mar 22, 2017 | 1993 Mercury Topaz

3 Answers

1999 Chevy Venture overheated on the freeway, had white smoke that smelled like oil and wouldn't start again. Had to get it towed to my house. It will turn over but not start and there is no water in the...


white exhaust tells me you have a leaky head gasket. if the coolant is totally gone and the engine was rattling before it died the engine may be totally obsolite now. have a pro look at it

Feb 15, 2010 | 1999 Chevrolet Venture

4 Answers

Over heat


If the head gasket goes water is allowed to seep into the cylinders and then out of the exhaust.

Once the level has dropped enough the car overheats

Or the water is pressurised in the radiator from the compression of the engine and it is forced out of the overflow leading to coolant loss and overheating

Sep 16, 2009 | 1996 Ford Contour

1 Answer

1999 Jeep Grand Cherokee overheated


You probably messed up a rod or caused piston damage your going to need more than a head gasket usauly when you over heat a car you causing the pistonts to expand more then they need to causing scouring and exsisive piston ware by the sound of it and the year your better off replacing the whole motor or completely rebuilding the old one wich will cost more then a use motor! good luck!

Sep 12, 2009 | 1999 Jeep Grand Cherokee

2 Answers

White coloured engine oil, overheating


White oil means water or coolant is leaking in via Head Gasket Failure or a crack in the head. Along with repair - be sure to have each cylinder compression tested to see if there is a crack that has developed. Thanks for using FixYa - a FixYa rating is appreciated for answering your FREE question.

Jun 09, 2009 | 1991 Toyota Pickup

1 Answer

What would cause my cylinder head to crack on my 4.3 2000 Envoy?


The cylinder head is a crucial part of all combustion engines, and cylinder head cracking can result in catastrophic damage to the engine. In some cases, cylinder head cracking may result in such severe injury to the engine that it must be replaced. As a result, most motorists try to prevent cylinder head cracking, as an ounce of prevention in this case is worth many pounds of cure. The causes of cylinder head cracking are all relatively simple and easy to prevent, except in the case of mechanical parts failure through no fault of the operator. The cylinder head, used in combination with a head gasket, seals the cylinders of the car, along with other parts associated with them. The cylinder head is customized for the vehicle, and has very precisely milled surfaces to provide a smooth and flush fit with all connecting parts. In the case of a minor crack, the cylinders may lose compression and misfire. Major cracks can cause severe damage to the cylinders of the engine. For this reason, when replacing either the cylinder head or the head gasket, make sure that you are using the correct parts, including bolts, for the job. Even a brand new car can experience cylinder head cracking if parts have been installed incorrectly or if there are weaknesses in the metal. Especially in the case of a vehicle which is still under warranty, drivers should contest the cylinder head cracking with the dealer. Be certain to inspect any vehicle before you purchase to check for weak spots in the metal or incorrectly installed components. This includes the cylinder head gasket, because improper installation of this vital part can cause cylinder head cracking. Cylinder head cracking has become more common as car manufacturers use mixed metals in their engines. Many vehicles, for example, have a solid cast iron engine block but an aluminum cylinder head. These two metals expand at different rates, and this can lead to cylinder head cracking. The most common cause of cylinder head cracking is overheating. When a vehicle overheats, it puts stress on all of its metal components, including the cylinder head, which is often at the center of the heat. This can cause the head gasket to fail, which may lead to cylinder head cracking as the components warp and pressure begins to leak. All drivers should properly maintain their vehicles to prevent overheating. Many drivers mistakenly pour cool water into the radiator when their vehicles overheat, in an attempt to bring the temperature down. This is not a good idea, because the rapid temperature change will cause cylinder head cracking due to thermal stress. In a case where the cylinder head survives overheating, the driver may inadvertently destroy it by trying to do good. To prevent overheating, make sure that your radiator is filled and in good condition, with a tightly sealed cap. Check to be certain that your engine thermostat is in good working order, and accurately reflecting the temperature. Make sure that you have no leaky belts or stretched hoses, and that the fan is working effectively. If your car does overheat, stop, turn off the engine, and allow it to cool completely before adding water. Cylinder head cracking can also be caused by localized hot spots in the engine, which usually represent a failure in some portion of the cooling system. Always make sure that hot spots are addressed, particularly if your head gasket has failed and required replacement recently. Hot spots are often caused by uneven expansion of engine parts, leaky hoses, and pre-ignition in the cylinders of the engine. If your car has overheated, check the cylinder head and gasket for signs of cracking or warping. If the cylinder head has warped even slightly out a flush state, it will cause cylinder head cracking. In this case, the head gasket may need to be replaced and the cylinder head should be ground even again before it cracks. Thanks for using FiXya - a FiXya rating is appreciated!

Jan 21, 2009 | 2000 GMC Envoy

2 Answers

Feul injector problems


ya u have to go to check the fuel injectors due to the overheating of the engine this can damage the injectors ,check it

Jan 20, 2009 | 1994 Toyota Corolla

1 Answer

Engine replacement due overheating problem


The syrup you are seeing (if it is white) is emulsification (water mixing with oil) with all due respect that car is too old to throw a lot of money at.
The emulsification would tie in with the overheating problem, this sounds more like a head gasket gone or a crack in the cylinder head.
I would take it to somewhere else and get a quote for a replacement cylinder head gasket and valve clean job, don't bother to check your cylinder head for cracks because crack testing is an expensive service, go to a breakers yard and get a second hand head to replace yours with.

Aug 15, 2008 | 1997 Honda Civic

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

166 people viewed this question

Ask a Question

Usually answered in minutes!

Top Jaguar Experts

Colin Stickland
Colin Stickland

Level 3 Expert

22219 Answers

yadayada
yadayada

Level 3 Expert

76682 Answers

SPEEDY CAR WORK SHOP...

Level 2 Expert

489 Answers

Are you a Jaguar Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...