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It will run with those compression numbers. Probably not in balance, but enough to let it idle badly. Get out the Techron Concentrate and put some in the gas. Let it idle and burn off any gook that may be keeping the valves from completely closing. Try some Sea Foam. Try Marvelous Mystery Oil. Bring it back to life slowly.
The cam timing bothers me though. Even the experienced mechanic can miss the mark -- one in ten times an expert can miss the cam chain alignment. That came from one of the top Saab guys by the way.
One other thing I have tried in the past to ID problems with compression. When the engine is cold, run the compression test. Then squirt oil in all the cylinders and turn it over for 20 seconds. Try the compression again. If the numbers go up, then it is the ring/cylinder. If they don't go up, then it is the valves not closing completely. You may have a combo of those going on.
posted by 64.12.1...
Posts in this Thread:
- 1985 Saab 900t head (compression results), Jaron, Tue, 8 May 2007 01:23:28
- Thank you, Jaron, Tue, 8 May 2007 15:20:38
- your engine is not blown..., Saabu
, Tue, 8 May 2007 06:41:37 - Re: 1985 Saab 900t head (compression results), Jaron, Tue, 8 May 2007 01:33:34
- Your short block is blown, ie bad rings.I'm Sorry4U.n/m, Chaz, Tue, 8 May 2007 03:54:24
- That's a pretty hasty diagnosis, Pete W., Tue, 8 May 2007 04:14:51
- Re: Rings Can Recover, Roger D
, Tue, 8 May 2007 08:51:35 - Re: Valve timing check & pencil trick from Chaz...., Alfred E. Newman, Tue, 8 May 2007 08:14:53
- Re: That's a pretty hasty diagnosis, Landjet
, Tue, 8 May 2007 04:27:16 <-- Viewing This Message - It takes several cranks to get up to pressure.Not hasty, Chaz, Tue, 8 May 2007 04:25:16
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