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Home >> Porsche >> 1996 >> 911 Targa >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 1 (Engine Controls - Specifications - CARRERA) >> Mechanical Checks >> Engine Compression

Engine Compression

WARNING: This page is about a different variant/trim than selected.

Check engine compression with engine at normal operating temperature and specified cranking speed, all spark plugs removed (on dual plugs, remove exhaust side only) and throttle wide open.

COMPRESSION SPECIFICATIONS

Application Specification
Compression Ratio 11.3:1
Compression Pressure
Normal 142-184 psi (10-13 kg/cm2 )
Minimum 107 psi (7.5 kg/cm2 )
Maximum Variation Between Cylinders 22 psi (1.5 kg/cm2 )