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Fiat Bravo Factory Service Manual (2007-2014)22 · Fault diagnosis
22 · Diagnostics

Engine whilstling / services belt noisy

Make
Fiat
Model
Bravo Factory Service Manual
Year
2007–2014
Section
Noise / vibrations › Engine whilstling / services belt noisy
Fault diagnosisEngine whilstling / services belt noisy

ENGINE WHILSTLING / SERVICES BELT NOISY

There is a high frequency noise coming from the engine whose intensity varies with the number of revs

TEST RESULTS
0PRELIMINARY CHECKSALL OKPROBLEMS ENCOUNTEREDACTION

Check the condition of the auxiliary drive belt and make sure the tension is correct.

Check whether the noise remains constant when the electrical loads switched on increases

Move on to Step 1

1. Belt worn

2. Tension not correct

3. Noise increases

1. Replace belt

Op. 1092G10 SINGLE ENGINE BELT - R.R

2. Adjust the belt tension

3. Move on to Step 1

1ALTERNATOR CHECKALL OKPROBLEMS ENCOUNTEREDACTION

Check that the alternator is working properly, in particular:

- Voltage regulator

- Connections between alternator and battery

Move on to Step 2

1. Voltage regulator defective

2. Connections not correct

1. Replace the pressure regulator

Op. 5530A10 ALTERNATOR - R+R

2. Restore the correct connections.

2AUXILIARY UNITS BELT CHECKALL OKPROBLEMS ENCOUNTEREDACTION
Check whether the noise disappears if the belt is disconnectedMove on to Step 3

1. The noise disappears.

2. The noise remains constant.

1. Move on to Step 3

2. Move on to Step 4

3AIR CONDITIONING COMPRESSOR CHECKALL OKPROBLEMS ENCOUNTEREDACTION
Check the operation of the air conditioning compressor.Move on to Step 4Air conditioning compressor faulty.

Repair or replace the compressor

Op. 5040A20 AIR CONDITIONING COMPRESSOR - R+R - INCLUDES FLUID LEVEL CHECK AND TOP UP IF NECESSARY

4BELT TENSIONER CHECKALL OKPROBLEMS ENCOUNTEREDACTION
Check the condition of the belt tensioner bearings.End of diagnosis

1. Fixed belt tensioner faulty.

2. Moving belt tensioner faulty.

1. Replace fixed belt tensioner

Op. 1092G20 ENGINE COMPONENT SINGLE BELT FIXED TENSIONER - R + R

2. Replace moving belt tensioner

Op. 1092G14 ENGINE COMPONENT SINGLE BELT MOVING TENSIONER - R + R

Parts & tools for this job For 2007 Fiat Bravo

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