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Model specific boards => Golf mk4 => Topic started by: Scott-R on 17 July 2013, 17:47

Title: Turbo bearing noise..
Post by: Scott-R on 17 July 2013, 17:47

I can hear my turbo bearings after I turn car off for about 5 seconds is this normal for the gt28 some sites suggest its ok.

Also still have 0 boost so replacing n75 as I have the n75f and I think today whilst running 23psi it died...

Ay other ideas on the boost issue?

Tested DV and seems ok
Tested actuator seems ok
Looked around most pipes seem ok
New maf
When I sit still and rev there's a funny turbo noise comes from turbo like a crappy dump noise could it be the DV spring? Is too weak to strong? It's a yellow spring.
Hoping its the n75 but also looked at my 1 way oil breather and its open both directions shouldn't it be that I can blow one way but not the other?


Ay help is wanted for this thanks :)

Title: Re: Turbo bearing noise..
Post by: Scott-R on 17 July 2013, 18:50

Has anyone had a blocked cat kill there boost?

Title: Re: Turbo bearing noise..
Post by: barrym381 on 17 July 2013, 19:03

Quote from: Scott-R on 17 July 2013, 18:50

Has anyone had a blocked cat kill there boost?

did you not take the cat out when you done the new exhaust  :smiley:

Title: Re: Turbo bearing noise..
Post by: Wazzzer on 17 July 2013, 20:14

Check the actuator is still connected to the wastegate...

Title: Re: Turbo bearing noise..
Post by: Scott-R on 17 July 2013, 20:16

It is....

Title: Re: Turbo bearing noise..
Post by: Scott-R on 17 July 2013, 20:17

Should it be super tight to go on medium or just slip on?

Title: Re: Turbo bearing noise..
Post by: james2 on 17 July 2013, 20:27

remove the tip /induction tube off the turbo and check your fan on the turbo . The blot holding it on can come loss . What kind of noise can you hear for 5 sec with engine off ?

Title: Re: Turbo bearing noise..
Post by: Scott-R on 17 July 2013, 20:35

Bearing noise and spool feels ok

Title: Re: Turbo bearing noise..
Post by: WadGTI on 17 July 2013, 20:42

I would have a look on youtube to see similar noise. Cant speak for VW turbos, but I had a 200sx with a garrett turbo.

I kicked the ass out of it and got to a stage where the turbo was "ticking" on spin down and then further on, the ticking was present during boost. At times, I had the downpipe glowing red.

If your brave, you can try checking the shaft for play.

Title: Re: Turbo bearing noise..
Post by: james2 on 17 July 2013, 20:49

Quote from: Scott-R on 17 July 2013, 20:35

Bearing noise and spool feels ok

i would look at the turbo as i do not ever here a Bearing noise from mine.  :undecided:

Title: Re: Turbo bearing noise..
Post by: Scott-R on 17 July 2013, 20:52

I have a ball bearing gt28 turbo tho

Title: Re: Turbo bearing noise..
Post by: WadGTI on 17 July 2013, 21:00

Quote from: Scott-R on 17 July 2013, 20:52

I have a ball bearing gt28 turbo tho

Ah.

 :cool: