Quote:
Originally Posted by P1800 ES
When I'm next at the car I'll do a compression test again and report back. I have a B20E engine, so am I correct in thinking compression should be around 150psi?
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The 1971 service manual specifies 170 - 200 psi for a B20E. That is presumably at sea level. I did a compression test on my B20E after a complete rebuild and the results came out at 163 - 168 psi. My altitude is 577 m so correcting to sea level that would be 171 - 176 psi. I also discovered that I put in a thick B20F head gasket rather than the proper 0.028 gasket which contributes to my test values being a little low by about 3%. Correcting for the gasket my average value would be somewhere around 178 psi at sea level. I have not retested since I refitted with a proper 0.028" gasket.
I run my valve clearances as tight as Volvo permits. If you run your clearances on the loose side this will increase your test pressure slightly.