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Home >> GMC >> 1998 >> C3500 HD 6.5 F, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 152 (Engine Controls - Service & Adjustment Specifications) >> Mechanical Checks >> Engine Compression
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Engine Compression

WARNING: This page is about a different car, the 2003 Pontiac Grand Am, 2003 Oldsmobile Alero, and 2003 Chevrolet Malibu. However, it is still accessible from the selected car via links, so may be relevant.

Check engine compression with engine at normal operating temperature, all spark plugs removed and throttle wide open.

ENGINE COMPRESSION SPECIFICATIONS

Application Specification - psi (kPa)
Minimum Compression Pressure (1)
(1) No cylinder reading should be less than 100 psi (689 kPa). The lowest reading cylinder should not be less than 70 percent of the highest.
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