I have been gettin a about 3-4 psi on both turbos for about 2 months now, i just replaces all the vacuum lines with silicone lines and im still leaking air, i can hear it comming from the engine bay... any know what it could be? thanks a ton (im going insane!)

 

i'm assuming you've checked all the IC piping for loose connections or cracks in the flexy part?

 

yeah, i have looked a ton of times for cracks and i have gone through and tightened everything down, but i do still have the plastic piping...

 

I bet its your plastic piping going bad. The plastic y-pipe is known to leak. Replace the clamps while you are at it.

 

Usually when the plastic Y pipe leaks you cant see it since its on the underside. This is what happened to mine.

 

well me and my friend filled a pucket full of water and put all the plastic piping under the water to see if we could see sir bubbles(we didnt see any). i dont know if that would actually show if there is a crack or not

 

also could it be that the stock BOV is staying open?when i rev the engine not under load it closes. but could it be staying open under laod?

 

This will not help with small cracks. Small cracks open up when preasure is introduced and can cause the symptoms that you are experiencing.

 

try this page: http://www.autosportracetech.com/RX-...eakDiagram.htm

 

Check the out put port of the secondary turbo. Make sure the flange nuts are tight. It is hard to see from above because the secondary turbo intake pipe lays over top of it.

Also check to see if your y-pipe o-ring seal is bad. There is a coupling point in the back half of the y-pipe that requires a rubber o-ring to properly seal. You will probably need to pull the y-pipe out and separate it to see.

 

BTW, nice concept, bad idea. What would you have done had there actually been small enough cracks?

You would have introduced WATER right into your intake tract while not under positive pressure. No folks, this is not how aquamist works, but this is how hydrolock works - pistons or not.

 

could this cause leakage in the primary turbo too ir just the secondary?

 

Standard place is the x-over pipe (black or silver plastic) comiong out of the turbos which eventually goes into the intercooler. Look at the 90 degree bend portion where it clamps (right of the black vaccum chamber).

 

thanx for the help

 

BTW: That's right of the chamber from the car perspective. If you're looking at the engine it's to your left, coming out of the turbos.

 

If you have a leak in any portion of the y-pipe assembly, it will affect the quality of the boost being supplied to the engine. The system is under high pressure and any path of escape is going to be where it vents first.

I actually think the probability is great that you will find the leak in one of the hoses that connects to the blow off valves. But someone else has already suggested that and I am merely offering another possibility if those hoses prove to be intact.

Not to brag, but I have had two FDs, driven 207,000 miles combined, so I have experienced all of the problems that have been described by others in this thread. Some are hard to find, but you certainly have some place where the boost is escaping to the atmosphere--either a split hose or a loose connection. Just keep looking. You'll probably go 'dah' when you find it. Good luck!

 

just wondering, but if the CRV (i think thats what its called)or the BOV that controlles that 2nd is split then would that affect the primary turbo?

 

2nd turbo (forgot to add the turbo)

 

check out bov's, they occationaly crack (the hosing)

 

Check the 2-3/4" diameter hose couplers starting with the turbo outlet that connects to the plastic pipe that goes past the air pump. Gotta take it off the car to inspect as it's near impossible to spot tears and cracks with them clamped in place, seriously.

 

Probably not as much as it does the secondary turbo, but again you still have a breach in the y-pipe assembly that allows boost pressure to escape. Think in terms of a trash compactor. Your turbos are trying to pack (compress) more air ( and thus oxygen ) into the intake. Thus, if you have a leak in the delivery assembly somewhere then you are not going to compress the air as effectively as otherwise. Just because the y-pipe leg that is supposed to carry boost from the secondary turbo is not the direct route to the engine intake for the primary boost, does not mean that some of the primary boost will not travel that direction if a pressure void (leak) allows it to. Air does not know direction on its own, it is channeled in a direction.