0 compression... just found out why(long) - Saab 900 Bulletin Board - Saabnet.com
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0 compression... just found out why(long)
Posted by Alex B (more from Alex B) on Fri, 24 Jun 2005 09:30:32
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A few days ago I posted that I was having 0 compression, and I was at a loss. Well I think sometimes we like to ignore the evidence because the most likely cause is something we don't want to accept.
I took the valve cover off and noticed the intake cam timing was completely off. I proceded to remove the cam sprocket and low and behold.. the notch on the sprocket had broken allowing the sprocket to spin freely without turning the intake cam. Several of the lifters were stuck indicating stuck valves.
Removal of the head revealed valves that were stuck open, and definate contact with the piston heads. small dents on 3 of the pistons and swirl marks as well. I just purchased a used head, and it is in a machine shop getting planed and cleaned. So hopefully I'll have her on the road by the end of next week!
Thanks again for all your input, I love this BB!
-Alex
1990 900 SPG 180k
1998 Volvo V70 T-5 140k
1982 900T 99k
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