An engine is burning oil. A dry compression test shows the cylinders to have 125 pound per square inch (psi). A wet compression test shows 130 psi. The most likely cause of the oil burning is:
a) bad main bearings
b) worn piston rings
c) bad valve seals
d) bad intake manifold gasket
The answer is...
c)
Bad
valve seals will allow oil to enter the combustion chamber. If it was worn
rings, a wet compression test will show a marked increase in pressure.
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