Re: High Idle, Hard Starting-help PLEASE! - Saab 900 Bulletin Board - Saabnet.com
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Blown head gasket !! Caused by overheat condition when running in the driveway at 3000rpm with a glowing catalytic converter. That was VERY hot and not healthy for the engine. "Churgling" start indicates missing on a plug, and white smoke and foul odor is definitely failed head gasket. Oil burn is BLUE smoke. Over rich mixture is BLACK smoke.
Pull the plugs and examine them. Any plug with coolant contact will be scoured completely clean, others will show normal light brown ash deposit. If the coolant thru gasket leak is bad enough, water will squirt out plug hole when you crank over minus plugs. Take a compression test on all cylinders abd look for a serious low cylinder.
Everett Dave
posted by 71.112.1...
Posts in this Thread:
- High Idle, Hard Starting-help PLEASE!, Darryl Strong, Thu, 17 Jun 2010 13:36:40
- Re: High Idle, Hard Starting-help PLEASE!, EverettDave , Sat, 19 Jun 2010 00:55:16 <-- Viewing This Message
- Here's why mechanics want history, Cmyles , Fri, 18 Jun 2010 07:51:37
- Re: High Idle, Hard Starting-help PLEASE!, darryl Strong, Thu, 17 Jun 2010 19:59:12
- Re: High Idle, Hard Starting-help PLEASE!, darryl Strong, Thu, 17 Jun 2010 19:53:26
- need more history, Cmyles , Thu, 17 Jun 2010 14:03:49
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