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Home >> Mercedes Benz >> 1994 >> E 320 Cabriolet (124.066) L6-3.2L (104.992) >> Repair and Diagnosis >> Engine, Cooling and Exhaust >> Engine >> Tune-up and Engine Performance Checks >> Compression Check >> Testing and Inspection >> Compression Test

Compression Test

- Warm engine to normal operating temperature.
- Remove spark plugs.
- Connect compression tester, special tool 001 589 77 21 00.
- Crank engine several times by pressing the contact switch on compression tester, in idle speed position with handbrake applied, to expell residues and soot.

CAUTION: Do not crank the engine at the starter SWITCH!

- Insert diagram sheet into compressio tester.
- Press compression tester into spark plug hole of respective cylinder.
- Open throttle valve fully.
- Crank engine approximately 8 revolutions with the starter. Check all cylinders in this manner.
- If minimum pressure is not achieved check cylinder for leaks.
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Test Data: (Engine at normal operating temperature).

Overpressure in bar
Compression at: Normal min. 10 max. 10
Fuel optimized min. 6 10
Permissable difference between cylinders max. 1.5



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