Bent valve stem? - Saab 9000 Bulletin Board - Saabnet.com
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Bent valve stem?
Posted by TSaab [Email] (more from TSaab) on Mon, 17 Jan 2005 12:39:24
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94 9000 CSE automatic, 195,000 miles.
put in an earlier post at "what's that thwacka thwacka". Still tracking down my problem. maybe it's a bent valve stem? Engine cranks and runs but with a horrible thwack at every revolution. Sounds like a marble in one cylinder or in the crankcase. Checked compression, it's ok. Pulled the valve cover, everything looks ok, i.e. timing chain. Actually ran it briefly with valve cover off to see if sound was coming from hydraulic lifters, it didn't seem to be. The sound seemed deeper in the engine.
I still haven't checked the crank pulley, that's next on my list.
But what is the symptom of a bent valve stem? would the engine still run and still have good compression with a bent valve? I assume that at the very least it would be missing on the bad cylinder. And can you bend a valve any way other than breaking the timing chain?
Thanks for your ideas.
posted by 204.57....
Posts in this Thread:
- Bent valve stem?, TSaab, Mon, 17 Jan 2005 12:39:24 <-- Viewing This Message
- Re: Bent valve stem?, Brett, Wed, 17 Aug 2005 13:21:38
- Re: Bent valve stem?, TSaab, Sat, 22 Jan 2005 13:02:50
- If compression is good, valves are ok!, aeroblues, Mon, 17 Jan 2005 16:41:45
- Re: Bent valve stem?, Craig, Mon, 17 Jan 2005 13:31:49
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