Burnt T4 Shim gasket...
Thread Starter
Joined: Feb 2003
Posts: 2,145
Likes: 133
From: East Chatham, New York
Burnt T4 Shim gasket... A few months ago, I got my kit ready to install and, per recommendations from others, I put a layer of red silicone sealant on the shim before I installed it. But as often happens after I got that ready, I found that I needed to disassemble a few pieces so I could insert a brace (this was a new kit and I didn't realize that the brace had to be installed after the turbo but before the crossover. Tight confines...). So, meanwhile the silicone sealant 'set' and when I put it on an hour or so later, I 'hoped' tightening all bolts well would make it seal okay. I should have cleaned it and started over but I was running short on time. Well, "pay me now or pay me later..."
Fast forward to last week, ... I was under the car changing the oil when I noticed a swath of exhaust soot on the back of the compressor housing. I assumed that the exhaust shim *might* not have sealed so well after all and had a small leak. I ordered a new shim from Jegs and just went out to take off the old shim and put on the new one. Ugh.. well...
My boost should come on a lot better with the new gasket.
Fast forward to last week, ... I was under the car changing the oil when I noticed a swath of exhaust soot on the back of the compressor housing. I assumed that the exhaust shim *might* not have sealed so well after all and had a small leak. I ordered a new shim from Jegs and just went out to take off the old shim and put on the new one. Ugh.. well...
My boost should come on a lot better with the new gasket.
Thread Starter
Joined: Feb 2003
Posts: 2,145
Likes: 133
From: East Chatham, New York
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Verdad Gallardo You still need to run the manifold-head gaskets. Make sure to use the mls ones.
Can RTV tolerate the direct exhaust temp in an application like this? I figure the exhaust has to be approaching 1000*. Copper RTV is good fo 700* intermittent.
Depends on how far from the exhaust port the turbo is located. Exhaust gases coming out of the head will exceed 1000 degrees when you run the motor hard but they also cool very quickly. In this case the RTV isn't in the direct path of the exhaust so yes, it will handle the temps.