Date: Sun, 03 Nov 2002 11:16:21 +0000
From: Grunff <>
Subject: Re: crankcase ventilation

unknown soldier wrote: > if the cylinder bores are worn, the pulsing could be due to pressure in the > cylinder passing past the piston into the crankcase. i think that this would > require a re-bore to sort out. has the engine been excessively caned, > particularly when it is cold (Saab advise light acceleration in turbo models > until the engine has warmed up)?? sorry i can't be more helpful, While worn cylinder bores would produce the symptoms described, they are virtually unheard of at such a low mileage, even for a severely abused engine. As for Saab's advice re. light acceleration when cold, that's there to protect the turbo (since the bearing is a metal-oil-metal interface, it is important that the oil is runny before the turbo spins up to operating speed). For the OP, it's going to be really difficult to diagnose the problem without some basic tests. First run a dry/wet compression test on all cylinders. If this doesn't give you the answer, then run a leakdown test. If you need more details let me know. -- Grunff

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