1994 Jaguar XJ6 smoking on start-up

SAM SHOMAKER

MEMBER
1994 JAGUAR XJ6
6 CYL
2WD
AUTOMATIC
109 MILES

Hi, I have a 1994 XJ6 that smokes a lot on start-up but then there is no visible sign of it burning oil. The guy I bought it from said that it had set for a long time and that the fiber piston seals had flat spots on them and some oil was leaking into the cylinder. Does this sound right and is there anything like an oil additive that would help this problem. Thanks

Wednesday, July 22nd, 2009 AT 4:11 PM

1 Reply

CRAIGINPA

MEMBER
23 POSTS

I doubt the explanation of fiber seals, but I do agree on the leakdown of oil into the cylinders. It's most likely caused by a sticking valve that's not fully seating. Cars that sit for a long time tend to develop this problem.

I'd start by changing the oil and then regularly driving the car every day (cold to fully warm) for the next week. Try to get at least a hundred miles on the car. If the problem doesn't disappear, you'll want to do a compression test to see if you've got a leaking cylinder or a blown head gasket.

Speaking of head gaskets, check the area around your oil dipstick tube for errant oil. If you find the area covered, you'll want to do the compression test right away.

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