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Cold compression test
Hi all
Im looking at purchasing a 3.0SC engine on webers and the seller has provided me a compression test done when the engine was cold as it is not in a car any longer. Can anyone give me an insight on what these numbers look like?
From the seller -
We hooked up the gearbox and the starter (included with the engine) up to battery, a jump starter and then connected to a battery charger. Used thick cables and we were able to get good cranking speed to do the test.
I do realise that a cold compression test does have limitations of what can be discovered, but the results were pleasing.
1. 145 PSI
2. 158 PSI
3. 157 PSI
4. 140 PSI
5. 145 PSI
6. 145 PSI
That shows from the lowest to the highest that minimum percentage value is 88.6% which according to Wayne Dempsey's - How to Rebuild and Modify Porsche 911 Engines 1965-1989 is above 85% minimum for a healthy engine.
Any thoughts?
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