Boost leak question.

[pj91gsx]

20psi would murder it and ultimately murder your motor .

OP, if it's a stock turbo, and has the J-pipe on, make sure there's a gasket between it and the turbo, and also check the upper and lower openings on your IC (if it's stock).I took mine off one day to clean it and found a buncha tape on one end. Turns out it had holes in it. $40 and all fixed!

dirt gets up between the pipe and intercooler hose and cause it to carode. $$40??? i fixed mine with jb weld. 5 dollars.

For the OP fill up the intercooler piping system with 17 psi, the bov with start letting out air, and when you let out of the pressure, the system will slowing let all the air out. It should hold air pressure for about 30 seconds during a test.

 

[Codester]

I had an oem pcv valve go bad on me within a month of use. A one-way check valve in the pcv valve-vacuum line is really the only way to go.

I have the US Plastics check valve too. They were just talking about PCV valves though. You still need an PCV valve in there to maintain the amount of vacuum since it's a measured hole. The check valve is only there to seal the crankcase from intake boost and the pcv does the job of controlling vacuum out of the crankcase.

 

[92rsAWD4me]

Looked at it, pcv is good. I cut off the corroded ends of some of the intake hoses and a few warn/stretched ends of some vacuum lines and drove it around some. It held until 6k rpm then I had to get out of it though because there was a cop up ahead of me. If i get a chance later I will try a full 3rd gear pass. I am gonna be happy/ upset if fixing those hoses fixes the issues. It was so easy and my laziness had kept me from doing it. It i can do a full pull later I will update after.

Also I checked out the turbo and there was no shaft play and there was only a light film inside of the intake piping and just inside the turbo. I think that is just build up from years of neglect though.

 

[LunarEclips]

were in the same boat with EXACT same problem as far as syntoms. We spike 14psi under boost and then drop down to constant 8psi of boost. Did a boost leak test and the problem sounds like its inside the turbo as well. How would you check if the seals are good on the compressor housing??

 

[92rsAWD4me]

From everything I have read about it, it looks like the only way to know for sure is to take it apart and look..