Birdman12

I have a T3 turbo with a 44mm tial external wastegate (ka24det). i was driving up a hill and boosting fine then when i let off my bov sounded half way and then i heard a ting or metal click noise and now it wont boost anymore...it still runs fine and feel like n/a. i took the wastegate off and took it apart to inspect, spring is good and everything looked fine. i checked for vacum and boost leaks, none. i have no idea what is wrong, turbo is fine and from what i can see the wastegate should be good too. any suggestions? thanks!

Joel 180

skylines make a ting sound when the ceramic exhaust wheel delaminates and goes flying into the cat.
But im guessing you dont have a ceramic turbo...

downshift_sideways

^what kind of fucking post was that?

That was no what helpful whatsoever. wow.

what is your boost gauge reading at after that happened?

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Joel 180

if the car isnt boosting youd assume it was zero.

no boost:
wastegate stuck open
blown turbo gasket
seized turbo
broken exhaust wheel
broken compressor wheel
excessive exhaust back pressure

Birdman12

i checked the bov and wastegate both in good working condition and no problems...im going to remove the turbo tonight and take a look at the exhaust side of the turbo and check to see if the shaft is still in one piece :S

golfer17

that's the only thing I can think of at the moment. kinda interested to see if it turns out to be something else, though. Let us know how it goes, this is the first time I've heard of a shaft breaking... I wonder if it could have been heat/lack of oil or if the wheels loosened up enough and lost their balance or...

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Birdman12

i`m going to check the wastegate again because i was reading some posts on ka-t.org and some guy was asking about the tial external wastegate and he asked if its supposed to be able to spin around while installed and some people said its not supposed to do that and i`m pretty sure mine does...i`ll keep you posted.

Birdman12

i took it apart and tightened down a nut and it doesn't spin anymore.

however, someone told me last night that there is supposed to be a valve seat ring between the wastegate and the manifold....i'm guessing that is the problem and that was the noise because i dont have that ring when i took the wastegate off. but where would have it gone? out the screamer pipe hopefully!

and now to look for a 38mm valve seat at 9:45 on a sunday morning before i have to leave for montreal again

golfer17

that makes more sense. I've heard of people buying ebay wg's and not having that included so their wg is always open, however, you should still see a little bit of boost if this is the problem. Not sure how it would come off though, that is pretty odd...

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Solidus311

Could it be a boost leak? Check all your intercooler connections.

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