Re: Spoke to previous owner - Saab Sonett Bulletin Board - Saabnet.com
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Re: Spoke to previous owner
Posted by eric in vermont [Email] (more from eric in vermont) on Tue, 8 Jan 2013 18:05:16
In Reply to: Spoke to previous owner, Michael Hafner [Profile/Gallery]
, Tue, 8 Jan 2013 11:35:53
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That doesn't sound good.
Here's what you need to do. Remove the plugs and crank the engine over with a compression gauge in each cylinder, one by one. Write down the pressure when it peaks out after a couple of revolutions. Then, squirt in a little engine oil a cylinder and repeat the test, one by one, writing down the pressures.
Normal pressure should be above 100 psi- more like 120 or 130.
You should look for even pressures, not varying by more that 10 psi.
If the measured pressure comes UP after squirting in the oil, it usually indicates bad rings.
If it stays the same, then you might have a burned valve.
There's more things to do, but that's a good start. Report what you measure and we'll give you advice.
eric in vermont
posted by 209.99.21...
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