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1.4 TSI Supercharger Chirp
There is now a modified supercharger clutch for this concern. This has been tested this on a number of vehicles and this has rectified the concern. Please see the attached TPI. This should also now be able to be seen in ElsaPro.*
This noise occurs only once and only when accelerating to about 3000 rpm.
To identify the noise use the attached sound file.
Technical background
As the water pump builds up with solenoid clutch, the one-piece anchorage plate on the outer pulley starts
to vibrate. The volume of the noise depends on the operating conditions.
Production change
Water pump with solenoid coupling from Engine No. CAV 154 174 in week 48/09 and CDG 010825 in
week 49/09 (TSI CNG) in Chemnitzengine plant.
Measure
If the complaint cannot be reproduced in stationary, perform the following test drive:
TSI twin charger with engine codes BMY, BLG, BWK, CAVA, CAVD:
Use part 03C.121.004.L or the new production part according to the parts catalogue.
TSI CNG with engine code CDGA:
Use part 03C.121.004.M or the new production part according to the parts catalogue.
For further fault finding check in the self-diagnosis of the engine control unit in measured value
block 236, display field 4, the condition of the solenoid valve (on/off).
Technical product information Transaction No.: 2012623/16
Brief, high-frequency squeaking noise from engine/front end Release date: 07-Jan-2010
• Clear
• brief
• high-frequency
• Open the bonnet and the driver window.
• Run the engine at idle speed.
• When pressing the clutch and accelerating once the noise should become audible. Repeat the check
without pressing the clutch. The noise should not be there.
• On vehicles with automatic gearbox the check is only possible when driving.
1. Constant speed in 2nd or 3rd gear at 2000-2200 rpm
2. Brief acceleration (1 second)
3. Repeat a few times
There is now a modified supercharger clutch for this concern. This has been tested this on a number of vehicles and this has rectified the concern. Please see the attached TPI. This should also now be able to be seen in ElsaPro.*
This noise occurs only once and only when accelerating to about 3000 rpm.
To identify the noise use the attached sound file.
Technical background
As the water pump builds up with solenoid clutch, the one-piece anchorage plate on the outer pulley starts
to vibrate. The volume of the noise depends on the operating conditions.
Production change
Water pump with solenoid coupling from Engine No. CAV 154 174 in week 48/09 and CDG 010825 in
week 49/09 (TSI CNG) in Chemnitzengine plant.
Measure
If the complaint cannot be reproduced in stationary, perform the following test drive:
TSI twin charger with engine codes BMY, BLG, BWK, CAVA, CAVD:
Use part 03C.121.004.L or the new production part according to the parts catalogue.
TSI CNG with engine code CDGA:
Use part 03C.121.004.M or the new production part according to the parts catalogue.
For further fault finding check in the self-diagnosis of the engine control unit in measured value
block 236, display field 4, the condition of the solenoid valve (on/off).
Technical product information Transaction No.: 2012623/16
Brief, high-frequency squeaking noise from engine/front end Release date: 07-Jan-2010
• Clear
• brief
• high-frequency
• Open the bonnet and the driver window.
• Run the engine at idle speed.
• When pressing the clutch and accelerating once the noise should become audible. Repeat the check
without pressing the clutch. The noise should not be there.
• On vehicles with automatic gearbox the check is only possible when driving.
1. Constant speed in 2nd or 3rd gear at 2000-2200 rpm
2. Brief acceleration (1 second)
3. Repeat a few times
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