If you take out one cylinder at a time - Saab 900 Bulletin Board - Saabnet.com
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If you take out one cylinder at a time
Posted by DirkP [Email] (more from DirkP) on Wed, 7 Mar 2007 19:58:42
In Reply to: Rod knock?, SteveD, Wed, 7 Mar 2007 15:06:04
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either ground a 5th spark plug to the block, pulling/swapping one spark plug wire at a time. Or can disconnect each fuel injector, one-by-one.
Then tweak throttle at varying up/down rates through the trouble RPM zone.
Noise variation with above should help ID rod or bottom-end main crankshaft bearing problem (noise easily transmits from bottom to top), after doing what NV suggests. But your Indy, if a Saab specialist of sorts, is probably in the right area.
Some can go quickly - days or weeks - others have driven +1 yr. Engine tear-down would be needed to assess. How is your oil pressure?
It can be a potentially dangerous situation, tho, with the engine suddenly seizing.
posted by 66.53.227...
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