t3/t4 turbo install. how do I plug wastegate

Mr. Spool · Jul 4, 2004

I have just purchased a t3/t4 turbo, with no internal wastegate. it only has the hole for it. I figured that I could just cover it with a 5 bolt flange and call it good. however I am not getting any boost (once I got 2.5 lbs) and when the vacume hits zero I am getting a high pitched noise, I believe this is due to the wastegate hole not being sealed properly.

so my question is, does this sound like I am right about why I am not getting any boost and loud high pitched noise at zero vacuume? and how do I go about properly sealling the waste gate hole that has no flapper to weld? thanks.

by the way I am running an external tial wastegate.

shersman · Jul 5, 2004

I would like to know the same thing, and I believe that your problem is the exhaust leak, as it sounds like thats what youre hearing.

SOHCturbo · Jul 5, 2004

either get a 5bolt flange without the hole, or do what i did and just fill the hole with weld.

Takes a bit of welding wire, but who cares, fills the hole a lot nicer.

s15driftking · Jul 5, 2004

weld that shit closed

Pacman · Jul 5, 2004

s15driftking said:
weld that shit closed

^^^ You could. Or try using a High Temp. Silicone, and torque it down nice and tight.

s15driftking · Jul 6, 2004

yeah a bead seal would work too, good one PACMAN, less work involved, NICE

2002whitewrx · Jul 6, 2004

Yes you need to weld it closed do you have a external wastegate installed? If you are not getting any boost it could be because your wastegate is stuck open or you need to check your lines off the compressor housing to the wastegate.

Pacman · Jul 7, 2004

s15driftking said:
yeah a bead seal would work too, good one PACMAN, less work involved, NICE

At Wal-Mart, they have a high temp silicone (the red stuff since is has a bigger heat range, not the blue) for $2.50 a tube I think.

2002whitewrx · Jul 7, 2004

Turbos get around 1,200 degrees from a stock motor I suggest welding it no way would silicone hold to this kind of punishment.

red240ne · Jul 7, 2004

mega copper from advanced auto. I use it on my downpipe, haha. It's gasket maker stuff...

t3/t4 turbo install. how do I plug wastegate

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