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Wastegate Flap Stuck Open

wallas

By wallas,
in Engines & Forced Induction

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wallas Contributor

wallas

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Hey guys, r33 ser2 with an r34 turbo and minor mods. Goot a GFB manual boost tee connected but its not actually boosting yet as i havent got a boost guage installed yet. I have customised the rear of the turbo to seperate the wastegate flap and exhaust port of the turbo as to add a screamer pipe.

Now, when i give the car a bootfull the wastegate flap seems to get stuck open as i can hear the exhaust constantly coming out of the screamer pipe section of the dump. It used to go away but has gotten progressively worse untill the only way i could get rid of it was giving it another bootfull, this took some doing as it would take forever to spool. But now it seems to be stuck for good. Gonna unbolt the dump tomoro and have a squiz. Has anyone come across this before? I have an r33 turbo spare (it let go so its not really spare), but can try an actuator swap? Let me know what you think cheers

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https://www.sau.com.au/forums/topic/273403-wastegate-flap-stuck-open/
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wallas Contributor

wallas

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Looks like the wastegate flap is jammed in the dump. Just take the dump off and grind out the screamer pipe bit. Got pics?

i have pics of it not installed though.. ill take pics when i take the dump off.. i checked and checked again before i put it on to see if it was clearing everything and it was... but we'll see later today when i pull it off.. what an effort it was putting on the turbo lines, far out.

gotRICE? Veteran

gotRICE?

Posted
Posted

Take the actuator off the wastegate, and open and close it freely with your hand, then you will be able to feel where it is sticking.

(i'd try this cos taking the dump pipe off is an ass if it was actually a faulty actuator :D) But if its a new dump pipe its more than likely the issue.

hypergear Grand Master

hypergear

Posted
Posted

Well if you had to rotate the comp and turbine housing then you must ensure the position of both housings are alight at the spot of the waste gate flap is shut. The factory actuator Rod does not adjust. Other option is to force shut the wastegate through its arm. If still see no boost means you might be missing a turbine wheel.

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