Engine - noisy operation
- Make
- Alfa Romeo
- Model
- 155 Factory Service Manual
- Year
- 1992–1998
- Section
- Procedure for fault rectification › Engine - noisy operation
Engine – mechanical (V6)Engine - noisy operation
ENGINE - NOISY OPERATION
FOREWORD:
Discover if the noises are really caused by the engine and not by other components like:
- Coolant pump
- Alternator
- Power steering pump
- Air conditioning compressor
- Hydraulic belt tensioner
Note whether the noise is mainly present when the engine is cool or at normal running temperature, when engine is at idle speed or if the noise increases as the revs increase.
Noise is produced by the engine it:
- noise is present when the vehicle is at rest and during travel
- noise is present when the clutch is engaged and disengaged
| FAULTS AND SYMPTOMS | FAULT ISOLATION | TEST REFERENCE |
|---|---|---|
| BEATING WHEN THE ENGINE IS IDLING | More or less constant noise is present when the engine is at idle speed, at normal running temperature; noise comes from the timing system cover area. | A |
| BEATING WHEN THE ENGINE IS COLD | Continuous beating of varying intensity coming from one or more of the cylinders. NOTE: Beating disappears when the engine is at normal running temperature. The affected cylinder can easilys be identified by dis-connecting the spark plugs one at a time. |
B |
| INTENSE AND INCONSTANT BEATING | Very intense beating which can be heard during clutch engagement and disengagement and during sudden acceleration. | C |
Parts & tools for this job For 1992 Alfa Romeo 155
- PARTEngine gasket setSearch: Alfa Romeo 155 1992 engine gasket set
- TOOLTorque wrenchSearch: 3/8 inch torque wrench
- TOOLFeeler gauge setSearch: feeler gauge set
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