Engine Compression

WARNING: This page is about a different car, the 2003 Cadillac Seville, 2003 Cadillac DeVille, and 2003 Cadillac CTS. 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)

Normal Compression Pressure

3.2L

⁽¹⁾

4.6L

140-170 (965-1172)

Minimum Compression Pressure

3.2L

⁽¹⁾ 100 (690)

4.6L

⁽¹⁾

⁽¹⁾	Lowest compression reading should not be less than 70 percent of highest compression reading. No cylinder compression reading should be less than 100 psi (690 kPa).