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Engine Compression

ENGINE COMPRESSION SPECIFICATIONS

Application Specification - psi (kPa)
Normal Compression Pressure
2.0L 199 (1372.1)
2.2L
Sonoma & S10 Pickup (1)
VUE 185-225 (1275.6-1551.4)
2.5L 199-227 (1372.1-1565.2)
3.0L 180-190 (1241.1-1310.1)
4.2L 215 (1482.4)
4.3L (2)
4.8L, 5.3L & 6.0L
Except Sierra & Silverado (1)
Sierra & Silverado (2)
5.0L & 5.7L (2)
6.5L (2)
6.6L (2)
All Others (1)
Minimum Compression Pressure
2.0L 170 (1172.2)
2.2L
Sonoma & S10 Pickup (1)
VUE 185 (1275.6)
2.5L 185 (1275.6)
3.0L 100 (689.5)
4.2L (3)
4.3L (2)
4.8L, 5.3L & 6.0L
Except Sierra & Silverado (1)
Sierra & Silverado (2)
5.0L & 5.7L (2)
6.5L (4) 370 (2551.2)
6.6L 300 (2068.5)
All Others (1)
Compression Variance
2.0L & 2.5L 15 (103.4)
6.6L 50 (344.8)
All Others (2)
(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 (689.5 kPa).
(2) Information is not available from manufacturer.
(3) Lowest compression reading should not be less than 70 percent of highest compression reading.
(4) Subtract 8 psi (55.2 kPa) for every 1000 ft. (304.8 M) of elevation above seal level. Measurement is taken with cold engine speed of at least 100 RPM, or hot engine speed of at least 180 RPM.
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