XJ6 coolant leak

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Aug 22, 2011 | 03:32 PM

jamestasha1

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XJ6 coolant leak

I have a coolant leak on my XJ6 2006,its been to the main Dealership for pressure tests,a block test,they have even changed the expansion tank and water pump and they have not resolved the problem.I am about £700 out of pocket as we speak.I travelled from Wales to London and had to stop 5 times to put in water as the coolant light kept coming on .I put in about 1 litre of water every time.There are no visible leaks underside of car,but there is antifreeze spray around top of expansion tank and engine.Please can anyone help,as im very frustrated.Jim

Aug 30, 2011 | 09:54 AM

Sparky.88

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Joined: Feb 2011

Posts: 46

Likes: 1

From: Huntsville, AL

If there is antifreeze spray in the engine bay, then sounds like you do have a leak. If you can get access to a pressure tester (around here most auto parts stores will loan you one), I'd test it yourself for leaks. Until you find the source of the leak, you're in the dark as to a cure.

If you can't get a pressure tester, then find a service shop that will pressure test it (someplace other than the dealer that didn't diagnose it properly the first time). Any shop, not just a Jag specialist, should have a coolant pressure tester.

Dec 2, 2011 | 06:36 PM

TheCounty

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Joined: Nov 2011

Posts: 61

Likes: 12

From: Ontario, Canada (TheCounty)

Pardon me for sounding simple, but could your expansion tank cap be the culprit?? This would explain why the dealership did not ID the leak as the pressure tester usually is in the form of a dummy pressure cap with an air valve adapter on it for charging. If your cap is dumping pressure at 3 psi instead of 12 or so psi then problem solved. Slapping the techs upside the head at the dealership if this is the case is your call.
Cheers
TheCounty