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Engine Compression

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

ENGINE COMPRESSION SPECIFICATIONS

Application

Specification

Normal Compression Pressure

psi (kPa)

1.8L

⁽¹⁾ 218 (1500)

1.9L

185-205 (1276-1414)

3.5L

Aurora

140-170 (965-1172)

Intrigue

⁽²⁾

4.0L & 4.6L

140-170 (965-1172)

All Others

⁽³⁾

Minimum Compression Pressure

1.8L

⁽¹⁾ 145 (1000)

1.9L

180 psi (1241 kPa)

3.5L

Aurora

⁽⁴⁾

Intrigue

⁽²⁾

4.0L & 4.6L

⁽²⁾

All Others

⁽³⁾

⁽¹⁾	No cylinder compression reading should be less than 15 psi (100 kPa) of highest compression reading.

⁽²⁾	Lowest compression reading should not be less than 70 percent of highest compression reading. No cylinder compression reading should be less than 140 psi (965 kPa).

⁽³⁾	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).

⁽⁴⁾	Information is not available from manufacturer.