Wastegate Failure
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Wastegate Failure
Last weekend I have been having some boost problems. Once minute 14 psi, the next minute I would only see 5 psi. I noticed the problem got worse after I drove around for a while and got everything nice and hot...
This weekend I pulled off the wastegate and took it apart to check it out. When I opened it I noticed the silicon diaphram was partially melted and slightly deformed. After looking over the entire setup I noticed that the top (aluminum housing) of the wastegate was literally touching one of the maniold runners. I am thinking that the aluminum conducted too much heat from the manifold which caused the diaphram to get too hot and melt. Here is a pic of the manifold and the wastegate mated together before I originally put it all in the car. Does anyone think the wastegate is mounted too close to the header? Is this what may have caused my problem, or is there something I am missing?
This weekend I pulled off the wastegate and took it apart to check it out. When I opened it I noticed the silicon diaphram was partially melted and slightly deformed. After looking over the entire setup I noticed that the top (aluminum housing) of the wastegate was literally touching one of the maniold runners. I am thinking that the aluminum conducted too much heat from the manifold which caused the diaphram to get too hot and melt. Here is a pic of the manifold and the wastegate mated together before I originally put it all in the car. Does anyone think the wastegate is mounted too close to the header? Is this what may have caused my problem, or is there something I am missing?
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Yea, I hear a lot about what certain products are "supposed" to do. I know it was not defective cause I took it apart and inspected it before I installed it and it looked fine.
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Wow ! That is way to close Josh. It needs some breathing room. I have never seen them made that close it usually sticks out behind the engine. I would have question that before I'd installed it.
Manny
Manny
Last edited by Immanuelrx; 05-18-02 at 08:36 AM.
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Originally posted by Immanuelrx
Wow ! That is way to close Josh. It needs some breathing room. I have never seen them made that close it usually sticks out behind the engine. I would have question that before I'd installed it.
Manny
Wow ! That is way to close Josh. It needs some breathing room. I have never seen them made that close it usually sticks out behind the engine. I would have question that before I'd installed it.
Manny
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This is what urks me, people claim Tial to have to best wastegates and blow off valves just because their friend had one and it worked. If thats the cause how come so many people are using the HKS wastegates and the turbosmart gates. Go with whats proven over what is said to be the best friggen wastegate. The fact is that the HKS and Greddy wastegates are the racers choice and thats for a reason.
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I don't think this is a problem with the Tial WG, I think it is a problem with the manifold design. Don't you agree Greg? Silicon will melt if it gets hot enough regardless of which brand of WG it is used in.
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Originally posted by Silver7
True but I was told that there have never been any problems with this setup with any other cars. Believe me, I questioned a lot of stuff.
True but I was told that there have never been any problems with this setup with any other cars. Believe me, I questioned a lot of stuff.
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Originally posted by Greg
This is what urks me, people claim Tial to have to best wastegates and blow off valves just because their friend had one and it worked. If thats the cause how come so many people are using the HKS wastegates and the turbosmart gates. Go with whats proven over what is said to be the best friggen wastegate. The fact is that the HKS and Greddy wastegates are the racers choice and thats for a reason.
This is what urks me, people claim Tial to have to best wastegates and blow off valves just because their friend had one and it worked. If thats the cause how come so many people are using the HKS wastegates and the turbosmart gates. Go with whats proven over what is said to be the best friggen wastegate. The fact is that the HKS and Greddy wastegates are the racers choice and thats for a reason.
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Originally posted by Silver7
I don't think this is a problem with the Tial WG, I think it is a problem with the manifold design. Don't you agree Greg? Silicon will melt if it gets hot enough regardless of which brand of WG it is used in.
I don't think this is a problem with the Tial WG, I think it is a problem with the manifold design. Don't you agree Greg? Silicon will melt if it gets hot enough regardless of which brand of WG it is used in.
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Originally posted by Greg
I agree with the manifold design being not too thought through but I also think that unproved influences can lean someone towards a certain prodduct when there are tons of "race proven" products out there that we know will do that Job. Anyways, good luck with the car Josh, Im getting a mig welder in around 2 weeks so if you wanna stop by and try to redesign your turbo system thats fine
I agree with the manifold design being not too thought through but I also think that unproved influences can lean someone towards a certain prodduct when there are tons of "race proven" products out there that we know will do that Job. Anyways, good luck with the car Josh, Im getting a mig welder in around 2 weeks so if you wanna stop by and try to redesign your turbo system thats fine
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50 of those manifolds yea right, How many people on this board have the Williams manifold. You and maybe a few other might be the only ones. I really doubt that the HKS techs or Trust techs would make a manifold that would place the wastegate so close to the runner. The new HKS FD manifold looks like a nice manifold and it would do the job. BTW, I never said Kits But I can honestly say that I dont think there is anything wrong with a turbo kit (other than price). I wouldnt do it but hey.....
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Originally posted by Silver7
I will call and find out moday. The problem is I need to find out how to prevent this from happening again.
I will call and find out moday. The problem is I need to find out how to prevent this from happening again.
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yea, I just looked through the "post your single turbo" post and you and turbostreetfighter are the only ones that said that they were using the williams manifold.
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I am just going by what marcus told me. Don't bash me about his claims. I am sure we are not the only two using his manifold. I have talked to one other person and seen pics of another. Just because they are not posted on the forum doesn't mean they don't exist.
I am kind of glad the WG didn't get stuck closed but it was really never stuck either way. It just gave inconsistent boost. I could get the dump pipe adjusted a little but it is currently plumbed into the DP and I would have to make some changes to that too.
I am kind of glad the WG didn't get stuck closed but it was really never stuck either way. It just gave inconsistent boost. I could get the dump pipe adjusted a little but it is currently plumbed into the DP and I would have to make some changes to that too.
#25
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I agree - keep the wastegate away from exhaust runners are much as possible.  It's a mechanical actuator with a silicon-reinforced (typically) diaphram inside.  I'm not too sure if this is your problem, cause if this diaphram got damage, you'd have problems with too much boost rather than too little boost.
-Ted
-Ted