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after head machining - white smoke, won't idle
Posted by Ben [Email] (more from Ben) on Sat, 19 Dec 2009 10:55:17
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Good day, everyone.
'99 9-3, 2.0 Stage 3
new head gasket, timing triple-checked according to cam marks and TDC on the crank/oil pump cover. Head was machined, valves reseated - looks absolutely amazing. However...
1. The car won't idle, and nearly half throttle is required to keep it running. Starting time is excellent, though - between two and four cranks.
2. White (and *very* light blue) smoke gushes from the exhaust, and the tailpipe leaves a spattering of oil behind the car. This smoke smells more like a two-stroke engine (not like the typical blown head gasket odor).
3. Standing still, we revved to about 5k to allow turbo spooling. A puff of brown smoke was noticed.
All wires, vacuum hoses, bolts, etc. were accounted for. Is it possible a turbo gasket is bad? It seems to spool normally, but if it's leaking, that means potential for decreased oil pressure, right?. Decreased oil pressure + very high turbine rpm = lots of drag. Could that keep the engine from running properly?
I'm going to disconnect intake piping and breathe straight from the throttle body, thereby (hopefully) seeing the oil leak exiting the turbo intake. I'll also open the waste gate all the way to pass the exhaust turbine completely and see if that improves idle quality.
Any ideas?
posted by 71.194.64...
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