MK5 Golf GTI

All Things Mk5 => Modifications & Technical Area => Technical Workshop => Topic started by: Timmyb007 on October 03, 2012, 03:27:47 pm

Title: very noisy fan / belt / something with engine running or just ignition on
Post by: Timmyb007 on October 03, 2012, 03:27:47 pm

As above

Very noisy with just ignition on and for a while after engine has been running and ignition turned off. Other problem was judder after switching engine off but have since decided this is unrelated - see below

Thank
Tim

Title: Re: Sometimes lumpy at the point engine is switched off / very noisy fan
Post by: skard on October 03, 2012, 04:33:32 pm

Do you have a diesel?

Sounds like the inlet manifold flap motor, sits just before the EGR.

Shares a circuit with the fans too.

Recently replaced mine, was £147 after discount from ECP for same part VW supply (wrongly listed as throttle body)

Title: Re: Sometimes lumpy at the point engine is switched off / very noisy fan
Post by: Timmyb007 on October 03, 2012, 05:06:10 pm

Hi yes its a diesel. I think the noise is there whilst driving more much more noticeable when engine off. Sounded like amplified turkey gobble! Haha any suggestions on how to narrow down what it is? Did your do it even with engine off?

Thanks

Title: Re: Sometimes lumpy at the point engine is switched off / very noisy fan
Post by: skard on October 03, 2012, 05:09:14 pm

These might be seperate issues.

Best bet is to get a VCDS scan.
However, my 'flap' never came up as a fault even though it wasn't functioning, it was when I took it out to clean I noticed it was solid. Replaced it and it turns off super smooth now.

Title: Re: Sometimes lumpy at the point engine is switched off / very noisy fan
Post by: Timmyb007 on October 03, 2012, 05:18:06 pm

I think you maybe right.

The main issue being the fan / belt noise. My wife encountered it today so ill take a look when I get home. And ill get that flap cleaned at next service.

Title: Re: Sometimes lumpy at the point engine is switched off / very noisy fan
Post by: skard on October 03, 2012, 05:22:53 pm

You can check function of the flap easily.
With engine off, undo the big black hose going into motor (front of engine, prise off clip with flat screwdriver) and see if you can push the flap inside, if it is difficult or won't budge it's likely seized open.
It's function is to close for a few seconds when the ignition is killed, then remains open, and allows for a smooth turn off.

Title: Re: Sometimes lumpy at the point engine is switched off / very noisy fan
Post by: Timmyb007 on October 05, 2012, 10:47:53 pm

Quote from: skard on October 03, 2012, 04:33:32 pm

Do you have a diesel?

Sounds like the inlet manifold flap motor, sits just before the EGR.

Shares a circuit with the fans too.

Recently replaced mine, was £147 after discount from ECP for same part VW supply (wrongly listed as throttle body)

It was exactly this in the end!! Got one from ECP as well, just got to fit it now.