lemon-mirror:
Home >> Porsche >> 1982 >> 911 >> Repair and Diagnosis >> Engine Performance >> Specifications >> Tune-Up - 6 CYL >> Engine Compression

Engine Compression

Perform compression test with wide open throttle and oil temperature not less than 140°F (60°C). Remove all spark plugs and allow about 12 piston strokes per cylinder test.

COMPRESSION SPECIFICATIONS

Compression Ratio 9.3:1
Compression Pressure
  Normal 142-184 psi (10-13 kg/cm2 )
  Minimum 107 psi (7.5 kg/cm2 )
Max. Variation
  Between Cylinders 22 psi (1.5 kg/cm2 )