1998 Jaguar XJ8



September, 2, 2007 AT 4:24 PM

My son's 1998 Jaguar XJ8 XL (48,000 miles) loses coolant regularly. I am adding coolant about every two weeks. Not a lot, but it drops enough to set off the " check coolant" message. No noticeable leaks or wet patches under the car. No white smoke at all, but there is a small amount of brownish gooky stuff on the inside of the radiator cap - very small. I understand this could be a variety of situations; hose leak, radiator leak, fuel pump issue or the worst scenario which is an intake manifold or head gasket issue. With such low mileage I am curious if others have had the same issue, and if it is an intake manifold or head gasket issue how I can make sure it gets properly diagnosed so I don't go through one costly repair only to find it didn't correct the problem. I have access to " import" mechanics in my area, but no Jaguar dealers. I am also curious as to opinions on using a jaguar dealer or an independent mechanic. Are there " better" gaskets I should acquire if it is a head gasket? How much should I be looking at for labor if it is a head gasket or intake manifold? Also, if it is a head gasket problem is this an issue where the heads need to re-machined to make sure it does not happen again? Anyone have this problem before or know if it is a known Jaguar issue with this V8 engine? Is there a simple coolant system check that can be performed to isolate the problem and make sure this doesn't become a trial and error mechanics lottery in labor charges?


2 Answers



November, 16, 2007 AT 6:51 PM

Hello, it really sounds like you have a head gasket issue. I worked on a jag at work and had the same symptoms. After taking apart. There was a head gasket blown. If you can find a shop with a combustion chamber tester they can determine it.



November, 20, 2007 AT 7:57 AM

I have a 99 xj8 that was loosing coolant. No noticable leaks on ground or under hood. But could smell it.I found leak. A pin size hole in a bypass coolant line that runs under the intake. I had remove intake and trottle body to replace.

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