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Home >> Geo >> 1990 >> Tracker Base, Automatic >> Repair and Diagnosis (Single Page) >> Engine Performance >> Engine Controls - Adjustments >> Engine Compression

Engine Compression

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  1. Warm engine to normal operating temperature. Ensure battery is fully charged, remove spark plugs, block throttle wide open and disconnect ignition coil primary connector.
  2. Put transmission in Neutral (M/T) or Park (A/T). Attach compression gauge and crank engine until maximum compression is reached at each cylinder and record pressure. See COMPRESSION SPECIFICATIONS  table.
COMPRESSION SPECIFICATIONS

Application Specification
Compression Ratio 8.9:1
Compression Pressure (1)(2) 170-199 psi 12.0-14.0 kg/cm2 )
(1) Maximum variation between cylinders is 14 psi 1.0 kg/cm2 ).
(2) Minimum allowable pressure is 170 psi 12.0 kg/cm2 ).