Stupot

Hi, can anyone confirm this as a dump valve fault... before the fault occurred I my boost guage used to go straight to 1.2 bar and then settle on 1.1 bar and all I heard was the luverlee tubo whistle Now i hit 0.9 bar of boost which then creeps up and fluctuates between 1.0 and 1.1 bar of boost acompanied by a noise that sounds like a jet engine warming up!!! but not so much like blowing accross the top of a bottle as described in the FAQ. Its not particularly loud but does have me a little concerned. Is it the common fault so many people get??

Cheers
Stu

AndyMc

Hi Stupot

If you are mechanically minded you could temporairly remove the dump valve or block one of the pipes to it.
This is OK due to the fact that the dump valve is not strictly necessary,(not all turbo cars have them).It is there to extend turbo life by reducing the maximun pressure it see's in normal use.This would prove if the dump valve is at fault.

I have a MY98 which recently started to make a whistling noise and suspected the dump valve.
I don't know what year your car is but I proved mine was OK by removing the pipe to the dump valve (where it connects to the intercooler) and then pushing it back on over a thick piece of polythene so the pipe was blocked.

I went for a drive and the noise was still there proving that it was not the dump valve that was leaking,it turned out to be a leak on the exhaust manifold before the turbo.

HTH

Andy

R19KET

Two easy tests.

1) remove it, and see if you can blow through it. If you can, it's stuffed.

2) just remove the vacuum hose (remember to block the end) and see if things change/improve.

The Standard piston seal is pretty poor, and does tend to leak after a while.

Mark.

Stupot

nice one lads, ill try it this weekend