Thread: Blowin Smoke?
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DonE DonE is offline
Wo ist die Rennstrecke?
 
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Join Date: Mar 2004
Location: Brooks, GA
Posts: 1,211
Here are a couple of places oil can be coming from:

1. Around piston rings, both cold and hot motor. Seeping around rings on a cold motor is fairly normal for these motors and usage of a quart over about 900 miles is average (or thereabout). If you think you have high oil consumption, pull the plugs and look for black inky deposits that mean oil usage.

2. Worn valve guides will use oil and is easily seen on decel as the vacuum from the cylinders pulls oil down the valves into the combustion chamber.

3. Oil past the turbo bearing into the hot side of the turbo will use oil and show itself under full accel and moderate driving. On a cold motor start, oil in the turbine will not normally burn immediately on start to provide the blue puff of smoke - that's oil in the cylinders.

To get an idea of where the oil is really coming from, do a leak down test on each cylinder. It won't take much leak past the rings to use lots of oil.
Old 10-12-2009, 06:35 PM
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