Mechanical Inspection: Compression

Ensure battery is fully charged. Turn ignition off. Disconnect ignition coils. Check engine compression with engine at normal operating temperature at specified cranking speed, all spark plugs removed, and throttle wide open. See COMPRESSION SPECIFICATIONS table.

COMPRESSION SPECIFICATIONS

Application

⁽¹⁾ Specification - psi (kPa) @ RPM

Optima & Magentis (Canadian)

2.4L

178 (1227) @ 250-400

2.7L

170 (1200) @ ⁽²⁾

Rio

184 (1275) @ 300

Sedona

170 (1200) @ ⁽²⁾

Sorento

170 (1200) @ ⁽²⁾

Spectra

193 (1331) @ 300

⁽¹⁾	Maximum difference between cylinders is not to exceed 14 psi (100 kPa).

⁽²⁾	At cranking speed. Cranking RPM not available from manufacturer.