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Considering acquiring older Jag. Your opinion, please, on reliability of in-line Jaguar 6 cylinder and the 12 cylinder

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Customer: Considering acquiring older Jag. Your opinion, please, on reliability of in-line Jaguar 6 cylinder and the 12 cylinder 6-liter engines of the l990s. Any particular issues to watch out for on these series of engines?

Answered by Richard in 1 hour 10 years ago

Richard

15+ years of experience

19,890 satisfied customers

Specialities include: Automotive Mechanic, Small Engine Repairs, Auto Body Repairs, Diesel Engine Repairs

Richard, Expert

Hello and welcome to justanswer.com

Overall both engines are very strong but both have issues with fluid leaks like oil and coolant from the head gaskets as well as other seals. The main issues with these vehicles were the electrical system. First check the body and frame to make sure it is not rusted out as some do. Next look closely for any signs of fluid leaks. I would recommend the 4.0 6 cylinder over the 12. The 6 has less high failures and is easier and less expensive to maintain. As far as the years go I would recommend a 1995-1997 sedan over the earlier 90s XJ and a 1995-1996 XJS.

Customer

Sorry, site dumped question before I finished. Thanks for info.

Located late '90's supercharged XJR, in-line 6, that has 50K miles and ultra clean. Guessing the supercharger brings HP to about 300-325.

In your view, is this over stressing the in-line 6 or should it still be reasonably reliable?

Customer

Been away from the computer. Will focus on inline 6-cylinder. One local one is a supercharged 6 (the later 90's XJR), w/ 45,000 miles. Think that version is +/- 320 hp. Safe level of boost/power for the inline 6?

I highly rated your answer, incidentally.

Thanks Richard

Richard, Expert

Yes I really did not see many issues with the boost on the six cylinder. Those XJR vehicles were pretty solid. 322 horsepower to be exact and they do drive nicer than the normally aspirated straight six.

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Richard

19,890 satisfied customers

15+ years of experience

Richard

15+ years of experience

19,890 satisfied customers

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