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Old 06-17-2013, 01:15 PM   #1
Suby_WRX
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Location: Westerville Ohio
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Default Coolant coming from Wastegate??

I am looking for a little insight into what is going on with my motor and any help is appreciated

So I have been having a bit of trouble with my wastegate sticking open lately and I believe it is because it is kind of a cheapy that I used to replace my broken Tial 44mm. The wastegate will get stuck open and I have to build boost to shut it, which takes forever when your wastegate it stuck open a bit! But it has always closed. However, this time it would appear it is really stuck open because I cant even build boost to close it.

The other day I thought I would start it up and try to tap it a bit to close it, but when I looked under the car, it appeared that quite a bit of coolant was coming from the dump tube off of the wastegate.

I was wondering how this might be happening. I thought coolant was only running through the housing of a VF39 and wouldn't be draining out the wastegate ???? Quite a bit of smoke is coming from the dump tube as well

Thanks in advance guys!!
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Old 06-17-2013, 04:39 PM   #2
super_usdm
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Originally Posted by Suby_WRX View Post
The other day I thought I would start it up and try to tap it a bit to close it, but when I looked under the car, it appeared that quite a bit of coolant was coming from the dump tube off of the wastegate.
Was the wastegate you removed Tials water-cooled MVR version? Were you running coolant through the old wastegate? Is your cheapy wastegate also water-cooled and if so, are the coolant lines hooked up correctly?
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Old 06-17-2013, 04:45 PM   #3
Suby_WRX
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No, there was no coolant going directly through the old or current wastegate. The coolant feed is just the standard feed that goes into the VF39. I am just puzzled as to how coolant would get into the wastegate from the turbo.
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Old 06-17-2013, 04:54 PM   #4
super_usdm
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I am just puzzled as to how coolant would get into the wastegate from the turbo.
It wouldn't, hence my question about the MVR. How do you know its coolant? Have you checked the coolant return line from the turbo? That line runs very close to your WG.
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Old 06-17-2013, 05:02 PM   #5
Suby_WRX
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When I pulled the car away after it smoked I saw it was coolant that was all over the dump tube and all over on the ground below it. I have checked the line, but I suppose I could have missed it. The leak seemed pretty substantial as it smoked quite a bit when it was on for a minute. Perhaps the line is leaking steadily and the vibrations and pressure made it appear to splash from places it didn't come from. I didn't think that was even possible, so thank you for the confirmation.
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Old 06-17-2013, 05:15 PM   #6
super_usdm
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1993 Legacy SS

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No problem. Keep an eye on your coolant level and if you're losing coolant, my money is on the return line. Unfortunately that seems like a completely separate issue from your WG getting stuck open. :/ Perhaps its just junk and not functioning properly...?
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