B

briw1986

New Member
Completed a compression test on freelander 1.8 and all cylinders are 14 bar or just over. Noticed oil level is slightly over the max. I believe they should be at 12 bar max. Has anyone the correct reading I should be getting.
I will be draining the oil and re doing test. Thanks Bri:blabla:
 
why ,the thing about compression test is comparison rather than exact reading should be done dry then wet ?(oil sqirted down bore to seal rings ) the fact they are they are the same is good
 
Yeah I know there should not be 10 % difference. Just with oil slightly over max, thought this may be giving me false readings. Cheers for reply
 
if oil was high enough for piston to hit it con rod/piston would be damaged,even high oil level is still not above sump level unless you put 2-3 gallons in
 
instead of trying to turn the engne over and measure the compression (which varies due to cranking speed and whether oil has been pumped round n stuff) a leak-down test is where you apply a known pressure to a cylinder at TDC (usually 100PSI) and see how much leaks down past the rings......

http://en.wikipedia.org/wiki/Leak-down_tester
 
you pressurise cylinder with air and measure its leakage rate ,you can tell where leakage occurs ie through valves,or into coolant etc
 
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