First, determine which cylinders are skipping. - Saab 900 Bulletin Board - Saabnet.com
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First, determine which cylinders are skipping.
Posted by RayF (more from RayF) on Fri, 25 Jul 2008 09:02:02
In Reply to: Coolant or oil smoke, skipping '90 SPG....(long), vsfoxe 
[Profile/Gallery]
, Thu, 24 Jul 2008 19:30:24
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From a COLD start, run car just a bit, and shut it off. Then touch your fingertips to the exhaust manifold, before it really heats up. You'll feel heat at the legs from the cylinders that are firing, but it will still be cold at the ones that are skipping.
Once you know that, BEFORE another cold start, pull the plugs at the mis-firing cylinders and look close at them. You're looking for water or coolant, or for traces of rust on the spark plug tip. Crank the motor and see if anything spits out of the plug hole.
My guess is that despite your not smelling coolant, it IS a coolant leak-head gasket situation - - white smoke, clears up after running a bit. If I were going to throw money at it to try to analyze it I'd spend the money on that before the turbo.
Valve stem leaks would yield oil smoke, not white smoke, and 900s don't get this problem bad, usually. If you do a head gasket you'll get new valve stem seals and get them installed as part of it, so curing any trouble from that front at the same time.
posted by 70.105.24...
Posts in this Thread:
- Coolant or oil smoke, skipping '90 SPG....(long), vsfoxe , Thu, 24 Jul 2008 19:30:24
- Thanks, everyone! I appreciate the....., vsfoxe , Fri, 25 Jul 2008 15:08:12
- First, determine which cylinders are skipping., RayF, Fri, 25 Jul 2008 09:02:02 <-- Viewing This Message
- Re: Coolant or oil smoke, skipping '90 SPG....(long), oldsaab, Thu, 24 Jul 2008 22:10:18
- Re: Coolant or oil smoke, skipping '90 SPG....(long), Justin VanAbrahams
, Thu, 24 Jul 2008 21:24:21
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