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Mechanical Inspection: Compression

Check engine mechanical condition using a compression gauge, vacuum gauge or engine analyzer. See engine analyzer manual for specific instructions. See COMPRESSION SPECIFICATIONS  table.

COMPRESSION SPECIFICATIONS

Application Specification
Compression Ratio
Storm (SOHC) 9.1:1
Storm GSi (DOHC) 9.7:1
Normal Compression Pressure
Storm (SOHC) 159 psi (11.2 kg/cm2 )
Storm GSi (DOHC) 170 psi (12.0 kg/cm2 )
Minimum Compression Pressure (1)
Maximum Variation Between Cylinders 14 psi (1.0 kg/cm2 )
(1) Maximum variation between cylinders is 14 psi (1.0 kg/cm2 ).