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Home >> Kia >> 2003 >> Optima LX, 2.4 6, Standard >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Controls - Basic Diagnostic Procedures >> Preliminary Inspection & Adjustments >> Mechanical Inspection >> Compression
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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.
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