All Things Mk5 > Mk5 General Area

Help please. No boost and rattle noise

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Onethreelee:
Firstly hello I'm Lee and new to the forum.
I'm from the uxbridge area.
I own a graphite blue 5 door mk5 gti with I want to modify and make DIY vids to help people out along the way.

In desperate need of help. I have no boost and no codes.
I have changed the dv.
I have changed the boost control solenoid.
Still no boost.
Also a major rattle from the timing chain cover that instantly stops when I
Unplug the oil control valve.
Please please help.

pudding:
The rattle is likely a broken oil control ring in the chain cover, it's quite common.  I suspect the middle ring of the 3 has snapped, which causes the rattling when hot.

As for no boost, what, none at all?  You would definitely get underboost fault codes, even if the turbo was completely shot to pieces.  The broken oil ring doesn't affect boost, so you need to give it a good going over and do some good old fashioned trouble shooting on it.  Laptops won't tell you everything unfortunately.

Onethreelee:
Thanks for the reply il whip the cover off and check the 3 rings.
As for the no boost its not logging any codes I can hear the turbo wanting to work and boost gauge reads normal vac pressure and boost to 1 psi if that.
I've changed the dv and boost control solenoid.
My next guess was going to be boost pressure sensor on the front pipe or maybe maf as there is no difference when I unplug it.

I've checked all the hoses and vac lines and no leaks to my knowledge no.
No smoke from exhaust and starts and idles as it should ( apart from the typewriter doing overtime in the timing chain cover when hot)

I'm starting to loose hope

GVK:
It's hard to see/access but I'm wondering if the wastegate arm has come off the turbo

Onethreelee:
Thanks il get under the car at some point and try and check this out

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