Depressing Boost leak test results

[GeneralChaos]

Well found out why my car is so turdly slow, I hooked up the stuff for a leak down test and guess how much psi I can hold.....2!

I found some small leaks on the bov gasket and weld to the pipe, and I also found some small leaks on the throttle body on the (I think) idle screw and a little bit on top where the pipe connects to it.

Im not sure where else but I cant hear anything obvious, but im only holding 2 pounds Any ideas? Going to be working on this for a while, ill come back and check now and then for suggestions.

 

[blcknspo0ln]

sounds more of a turbo problem than a boost leak problem. check the shaftplay on your turbo.

also do a compression test if you have the chance.

best of luck

 

[GeneralChaos]

yea I forgot to say I checked the shaft play and there was 0, unless im an idiot and did it the wrong way.

im gonna try a compression test tonight if we can find the tester.

 

[oldman]

1. Disable the MBC, most of them have a bleeder hole.

2. Bring cylnder 1 to TDC to close the intake valves.

3. Start to fix what you find first and repeat test, hard to pin point when there so many leaks.

Hope that helped.

 

[GeneralChaos]

I think my turbo is blown. I went to double check shaft play and it can move back and forth (like if you push and pull on the shaft) a lot, probably a couple millimeters at least,and if I remember reading right back and forth shaft play is a really bad thing.

The previous owner did have a t3/t4 on there for a break in period, and maybe he did that because the t25 blew. and threw it back on.


I didnt have cylinder one at TDC though so I can try that, but what do you guys think on the turbo? sorry not enough time to search for hours.

 

[GeneralChaos]

ok turbos blown, excessive shaft play is there, oil in the intercooler pipes, and more smoke then I think there should be coming out of the exhaust.

2 others agree with me and it makes a LOT of sense. I still have a few boost leaks and things but ill worry about those when I upgrade.

Now... 14b that my friend has laying around, or to just go for the big boys

 

[oldman]

A "big boy" will require a lot more supporting mods than what you've listed in the profile, I say bolt on the 14b until you're ready.