Thought I'd post this since I thought it was worthy of a thread. Been working on a boost leak with a buddy for about a weak and everytime we'd pump it up past 5lbs we'd get this loud high pitched whining noise. We couldn't pin point it because it was so loud. I thought it was my BOV so we isolated it and it held 25psi....so then I thought it was the coupler on my turbo, tested it and it held. WTF couldn't find it.

After about an hour, we tested everything around the intkake tube, I jacked the car up and got underneath. Started feeling around my LICP pipe and coupler and didn't feel any air. So I reached up to my turbo to check the wastegate and the noise changed. I felt around and found it was the metal tube that connects to the turbo then connects to the LICP. It's a PITA to get to the 2 12mm bolts that are holding it but anyway I got it out. There is a metal crush type gasket on there that you could see the pipe was sitting wrong on the gasket and I know the turbo has never been swapped or tampered with so it had to have been leaking from the factory.

Gasket was in great shape but I went ahead and swapped it out with a new one since it is a crush type. Anyone else heard of them coming like this from the factory or just a coincidence that mine was this way? it's an 03 with 43k.

 

I would of pressurized the system and had at it with soapy water, works EVERY time even with the smallest of leaks.

But to answer your question, I don't know own a lancer and have zero first hand experience with it

 

i have an 03 as well.....and mine didn't leak there until i changed mine because it was leakin on the copuler that goes form that J pipe to the IC.......than when i swap it out now it will leak from that J pipe to the turbo...and i coudln't never resolve it..been a while now and i can barely drive my car..haven't boosted in so long...haven't gotten aroudn to it..

i think i need to buy a brand new J pipe, last one i got was used and that could be the issue...

but yes..those two 12mm bolts are a big PITA, not to mention i stripped one and had to buy another...one that is barely touching the oil return line...were you able to repair yours?

 

Yeah mine held 25psi. I am going to do another though next weekend just to be sure. I didn't use the "factory" gasket either. I used some of that make your own gasket material and then some gasket maker to seal it completely. I'll test it again and let you know if it holds.

 

you mean the one you cut out yourself?......or that liquid stuff

 

I cut one out myself then used the tube style gasket maker. I just put a small bead on the edge to ensure it would seal up.

 

Yup, i have seen that gasket fail.

 

ok i'll take my off n check again...when i bought another j pipe...i bought a new gasket as well.....but the line up could b off a big..but its hard to insure its perfect

 

Let me double check mine and get back with ya but as of Sunday it was holding boost

 

had an evo that that gasket went bad on. less common then other areas but the whole damn system is prone to leaking

 

Ahh boost leaks. They are the bane of everyones existence. I had a wicked bad one at the TB. Had to replace the TB and everything...was robbing me of 35whp. No exaggeration either. I hate boost leaks.

 

someone should make a diagram of how to do a correct boost leak (setup)

i made one but i dunno if it works :S

 

I only had 2, that one and my TB seals. Which I was surprised by but I was extra **** when installing my ic pipes. I am hoping by next weekend to have it all worked out so I can finish my tune.

I hate boost leaks as well, especially ones like this. It was such a loud whining noise that you couldn't pin point where it was coming from. I thought my tester was bad, so I resealed the tester. I thought it was my BOV so I was swapping BOVs....Thought it was my intake so I took it off about 50 times. What a PITA!!!!!