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What does this pipe connect to? (huge boost leak)
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09-30-2016, 03:41 PM | #1 |
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What does this pipe connect to? (huge boost leak)
So I've been getting the P2C57 CEL when going full throttle. If I just go part throttle, I could drive around all day without the CEL coming on. However, as soon you you put the gas pedal to the floor, the car goes into limp mode and throws the CEL along with the reduced power engine malfunction warning.
Being that this code references a boost leak, I hooked up a boost leak detector that I made and pumped some air into the system. Immediately upon doing, I could hear air gushing out from the pipe that the boost leak detector is attached to. If I push this pipe in towards the firewall and hold it there, the air noise stops and it seals. (see YouTube video below) Obviously I found the cause of my CEL but the problem is that I can't see or even tell where that pipe connects to as its buried in the engine. Has anyone had this same failure before? What does this pipe attach to and what's the best way to go about gaining access to it? Last edited by B Feelgood; 09-30-2016 at 03:47 PM.. |
09-30-2016, 03:59 PM | #4 |
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Correct, in the picture I'm pointing to the turbo inlet pipe that the boost leak detector is attached to with eh intercooler pipe to the left of it. However, I see no way of gaining access to removing this pipe. Are there o-rings/seals that hold this pipe onto the turbo or go just a clamp?
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09-30-2016, 05:30 PM | #5 |
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I doubt that is the reason for your boost leak since it is before the turbo. It doesn't see boost. If you really want to take it out to check, there is one screw holding it in place on the right side. Check your charge pipe and intercooler plumbing for obvious leaks.
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09-30-2016, 05:36 PM | #6 |
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Thanks for responding. Wouldn't a huge leak here be drawing in unmetered air? It sounds like there is one bolt that holds that pipe on and then it just pushes into onto the turbo inlet?
The dealer originally stated it was the charge pipe that was leaking so I replace that already and then verified it wasn't leaking. |
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09-30-2016, 06:05 PM | #7 |
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Correct me if I'm wrong but it looks like there is just one bolt on the top of the pipe and then the bottom half simply pushes onto the turbo outlet with no other bolts/clamps? The only thing holding it onto the turbo inlet is force/pressure?
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09-30-2016, 06:41 PM | #8 |
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Video shows intercooler hose, pic shows inlet? Nice shoes btw
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335i e92 TPC 19Ts
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09-30-2016, 07:26 PM | #11 |
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I reinstalled the pipe back into the turbo inlet, tightened the bolt at the top, and hooked up the air pressure again. As soon as I run 5-6 psi of air, that pipe backs off of the turbo inlet and create a huge leak.
Isn't this the best place to test for leaks on the N55? If so, how do I keep that pipe from popping/backing off of the turbo inlet whenever I induce air pressure into the system? |
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10-01-2016, 12:25 AM | #13 |
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Buy a new gasket, make sure u clean the turbo inlet with break cleaner so it cleans up oil and such, spray some hairspray on the new rubber gasket and give that a shot. Air spray becomes tacky when it gets got and dries up
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10-01-2016, 08:02 AM | #14 |
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Guys you will never get it to hold pressure. This piece only needs to support vacuum, air being sucked into the turbo. I guarantee you do not have unmetered air getting in unless the gasket is damaged severely. The leak is somewhere else.
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10-01-2016, 01:02 PM | #15 | |
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Quote:
-Kevin |
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10-01-2016, 03:23 PM | #16 | |
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Quote:
http://www.1addicts.com/forums/showthread.php?t=1143853 |
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10-01-2016, 05:07 PM | #17 | |
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Quote:
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10-02-2016, 01:15 PM | #18 |
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Where do you plug-in or hook up to perform a smoke test on a 55 motor? Also, if there's a leak that only occurs during high boost, how would you go about diagnosing it? Doesn't the smoke test only use a few PSI of pressure just to circulate the smoke?
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