c00lduke

I was testing somethings on my 7 and I decided to test my wastegate. When I applied pressure to the bottom port the valve seems to work well but the I can hear/feel a little bit of air escaping. I was wondering if this was normal or not.

Thanks
~Luke

twokrx7

iTrader: (1)

My HKS wastegate would leak boost after the valve started to lift. I could pump it up with a hand pump and it would hold pressure until the valve started to lift, difficult to get it to open fully due to the high leak rate.

books

iTrader: (8)

once it started to leak would it stop leaking at any particular psi or did it continue to loose pressure until 0 psi?

twokrx7

iTrader: (1)

It would lose pressure until the valve reseated, below it's spring pressure setting.

I inquired about this on the forum, from speed shops and even the OEM ... everyone said it was normal for the HKS. I would not buy another one of their wastegates because of this crap, cannot be good for boost control IMHO.

c00lduke

It still seems to be very responsive but just hear a tiny leak.

DCrosby

If it's leaking, it's possible you're seeing more boost @ the manifold than is getting seen / compensated @ by the wastegate spring....

I know that my boost gauge (defi) is off by 1lb since the spring and the 3Bar map sensor read 10 Psi, and the gauge reads 9 psi

Sesshoumaru

iTrader: (1)

I would check the diaphragm.

It will leak if the bolts are not tight to seal the diaphragm

rotorbrain

i had to put an o-ring on the adjustment screw to get leaking to stop.

my leak was so bad. . . the spring wouldnt even BEGIN to open until 15psi and it was wideopen at 22psi. it was amazing. . . brand new. anyways, put the o-ring in and everything was good to go.

paul

twokrx7

iTrader: (1)

Paul ... what adjustment screw is there on the bottom side of your wastegate? There was none on my HKS wg.