240SX L4-2389cc 2.4L SOHC MFI (KA24E) (1989)
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If adding oil helps compression, piston rings may be worn or damaged. If so, replace piston rings after checking piston.
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If pressure stays low, a valve may be sticking or seating improperly. Inspect and repair valve and valve seat. (Refer to S.D.S.) If valve or valve seat Is
damaged excessively, replace them.
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If compression In any two adjacent cylinders is low and If adding oil does not help compression, there is leakage past the gasket surface. If so,
replace cylinder head gasket.