Workshop Manuals Factory service & repair Alfa Romeo
01 General data and specifications02 Maintenance03 Diagnosis – checks04 Engine (1.6 and 2.0 Twin Spark)05 Clutch06 Gearbox (manual and Selespeed)07 Front axle08 Brakes, ABS and traction control09 Steering10 Suspension and wheels11 Heating, air conditioning and washers12 Electrical equipment13 Body14 Body panels and reinforcement15 Wiring diagrams16 Connectors and pin-outs17 Wiring harnesses18 Fault diagnosis19 Special tools
Alfa Romeo 147 Factory Service Manual (2000-2002)18 · Fault diagnosis
18 · Diagnostics

S11 Engine droning

Make
Alfa Romeo
Model
147 Factory Service Manual
Year
2000–2002
Section
Noise/vibrations › S11 Engine droning
Fault diagnosisS11 Engine droning

S11 Engine droning

Replace the mobile belt tensioner

StepTest procedureResultAction
0PRELIMINARY CHECKS

Check the condition and seal of the air supply circuit

OK

Move onto step 1

Circuit component damaged
  • Replace the component involved

End of diagnosis

1CHECK ON CONDITION OF ENGINE SUPPORTS

Check the correct fixing and condition of:

  • engine supports
  • flexible mountings
  • reaction rod
OK

Move onto step 2

Engine supports fixing not correct
  • Restore the correct fastening

End of diagnosis

Gearbox side engine support defective

End of diagnosis

Timing side engine support defective

End of diagnosis

Front support flexible mounting faulty
  • Replace the front support flexible mounting Op. 1008B10

End of diagnosis

Rear support flexible mounting faulty

End of diagnosis

Gearbox side support flexible mounting faulty
  • Replace gearbox side support flexible mounting Op. 1008B30

End of diagnosis

Reaction rod fixing not correct
  • Restore the correct fastening

End of diagnosis

2ENGINE EXHAUST SUPPORTS CHECK

Check that the exhaust pipe mountings are fixed correctly

OK

Move onto step 3

Mountings loose
  • Secure the mountings

End of diagnosis

Mounting damaged
  • Replace the mounting

End of diagnosis

3ENGINE EXHAUST CHECK

Check the engine exhaust system and, in particular:

  • pipe
  • exhaust silencer
  • catalytic converter front/rear gasket
OK

Move onto step 4

Pipe damaged

End of diagnosis

Intermediate silencer damaged

End of diagnosis

Rear silencer damaged

End of diagnosis

Front gasket worn or damaged

End of diagnosis

Rear gasket worn or damaged
  • Replace the rear gasket

End of diagnosis

4CHECK ON CORRECT OPERATION

Check that the fault is no longer present

OK

Incorrect selection of diagnostic procedure

Fault persists

Incorrect selection of diagnostic procedure

Parts & tools for this job For 2000 Alfa Romeo 147

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