Gurgling Noise From Air Filter Box

[lochlan]

Hi, I have 2001 tdi- when you de-celerate or switch engine off there's a gurgling noise coming from air filter box, any Ideas were to look 1st?

[NikpV]

Hi, I have 2001 tdi- when you de-celerate or switch engine off there's a gurgling noise coming from air filter box, any Ideas were to look 1st?

 

check that the air con clutch (below and slightly to the front of the air filter) is not loose and wobbly on its shaft - sound odds but it can make some very odd noises if the nut has come undone and its loose - the splines on the compressor aremuch harder than the clutch and will wear the clutch plate away - I had this and I ignired the noises too long = clutch was b*gggered when I found it in the undertray

[dlt1617]

See below as I think this refers to the noise, also as it's a different control unit to stop it I wouldn't worry about it as it's been doing it for years

 

Best wishes

 

Dave

 

 

TECHNICAL SERVICE BULLETIN No.53/2002

Car and Light/Medium Commercial 30.05.2002

 

 

Section: 307-01B

 

Model: 2000.75 Galaxy with 1.9L TDI engine (85 kW) and AG5 automatic transmission, built from 10.12.2001 to 14.03.2002 (build code 1E to 2S)

 

Markets: All

 

Subject: Noises from the intake system (in particular a charge gurgling) during overrun

 

Summary

 

Should a customer express concern over noises from the intake system (in particular a charge gurgling) during overrun, the probable cause is excessive boost pressure and air swirl in the turbocharger intake tract. To rectify this concern, the powertrain control module (PCM) with software level 1516 should be removed and a PCM with software level 1561 should be installed. The boost pressure and subsequently the air swirl are reduced during overrun with the new software.

 

 

Parts Required