1993 Holden Commodore

1993 HOLDEN COMMODORE
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BUSHY05
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1993 Holden Commodore

compression cylinder test differs frfom cylinder to cylinder what could be the problem
Oct 3, 2009 at 5:35 AM
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MHPAUTOS
  • ✓ASE Certified Mechanic
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  • ASE Certified Mechanic
Hi there,

You will need to do a wet test... this is where a small amount of oil is added to the cylinder just a few squirts from an oil can, this will seal the rings and then do a comp test again, if the comps come up the rings are a problem if not the valves are the problem, do this one cyl at a time, and the rule of thumb is no less the 10% variance from high comp to low comp.

Mark (mhpautos)
Oct 7, 2009 at 5:03 PM
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