smoking 944S
04-11-2003, 04:08 PM
#1
4th Gear
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smoking 944S
I have a 1987 944S. A few days ago when I was pulling into the driveway the car suddenly started to run rough and smoke out the exhaust. The color of the smoke was light gray. I pulled out the spark plugs and one was covered in oil. I replaced all the plugs and it ran fine for about 15 minutes. Then all hell broke lose. It started to smoke again very badly. I pulled out the plugs and every one of them had been blackened up very badly. I have a feeling that some piston rings or valve casings are bad. Could this be true, or is there something else wrong?
04-11-2003, 06:08 PM
#3
Burning Brakes
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Hard to tell what's causing this, but you could narrow it down by unhooking your oil breather return line and running it into a bottle. Naturally, cap off the fitting on the manifold where the line hooks up. This way you can see if you're sending oil into the chambers via the crankcase ventilation system. Given that you first got oil on one plug, and then on all the plugs immediately thereafter, it's unlikely oil is coming in past the valves. It's probably from the breather. Which may mean you may have a broken ring and are pressurizing the crankcase. But hopefully not.
Do a compression test too.
Bryan
Do a compression test too.
Bryan