September 30: LEMON manuals is back up on a temporary server! Slowness is possible

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.