300CE (124.051) L6-3.0L (104.980) (1990)
Compression Check: Testing and Inspection
Compression Test
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Warm engine to normal operating temperature.
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Remove spark plugs.
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Connect compression tester, special tool 001 589 77 21 00.
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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!
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Insert diagram sheet into compressio tester.
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Press compression tester into spark plug hole of respective cylinder.
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Open throttle valve fully.
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Crank engine approximately 8 revolutions with the starter. Check all cylinders in this manner.
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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