XK-8 oil consumption

(Dale Warrington) #1

Am I the only one to have oil consumption problems? My 2003, 4.2L, XK8 emits a huge oil smoke cloud after driving, then sitting (not running) for 30 minutes or so, and then re-starting. Not so much on cold starts in the AM. I thought it might be valve stem seals, but apparently no one else has this problem. Just purchased the car, so I don’t know anything about th engine except that is not the original. Any ideas?

(JLo) #2

Hi dale, mine emits smoke when starting it sat for more than 30 mins. It burns about 1 quart every 500 miles. But then, my 97 xk8 does have nearly 230k miles.

(Paul Wigton) #3

Likely bad valve stem seals: easy way to tell: smokes on hard acceleration= rings, smokes on overrun (foot off loud pedal, rolling down in speed) = valve seals.

(Dale Warrington) #4

That’s what I thought, but it doesn’t seem to be a common problem like it was on the old small block Chevys. No other references on the forum.

(Dale Warrington) #5

Removed the left cam cover, and the way the head is designed, valve stem seals seem to be less likely the culprit. Plugs do show signs of oil burning. Back hurts, so I will run a compression check Monday.

(Paul Wigton) #6

A leakdown test would be called for, too.

(Dale Warrington) #7

I have only had my XK* for about 6 weeks now, and it has been in my shop getting new paint, shocks, spring isolators, upholstry, and a few other small repairs. Consequently, I have only driven it about 60 miles. Thought I had a valve seal problem, but now have decided that I have a coolant leak problem. After running the car a few miles and getting pressure on the cooling system, I get smoke out of the tail pipes on re-start. Smells like anti-freeze more than oil. Today, I ran it for about 30 minutes, shut it off for a few hours, re-started it and got a huge smoke cloud. Shut it off again ,loosened the coolant cap, let it sit for about 30 minutes, an NO smoke. Being that there is no coolant flow through the intake manifold, I am asking for any suggestions as to where to go with this.

(Eric Capron) #8


Are you actually loosing coolant? If so, I would get the cooling system pressure tested because if you’re correct and coolant is getting into the exhaust I’m wondering if you have a head gasket problem.

Shropshire, UK