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How bad is this boost leak? And would it cause this issue, and etc..

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Hey guys!

 

Currently in the process of getting the car mapped by Faboka (can't praise him enough, he's always been there for me when i've had an issue so far!! )

 

However I noticed that when accelerating hard from second or third gear low down the rev range it's revving progressively and the car isn't moving in correspondence. Doesn't feel like clutch slip at all to me I don't think as surely the revs would rise lots then settle again. There is also a **** load of black smoke deposited from the rear when this happens. So I tried my boost leak tester today and noticed this:

 

 

http://www.youtube.com/watch?v=qQbZ-PTb9jw

 

 

Is this quite a bad leak and lead to my symptoms?! I'm only putting in a bit of psi from the tyre pump and spraying with soapy water and its bubbling that much.

 

Also how would I go about fixing it?

 

I've got an EGR delete pipe and would love to put a bit of silicone straight from the egr delete to the black boost pipe after cutting the crappy lug connector off, what do people think?

 

 

Cheers!! Daniel

Try new oring first

Im guessing the lugs are worn on both hose and plastic pipe.

Allard do a bespoke replacement for that pipe that fits much better than sfs one.

may need to ring them but it seems to be a reasonable price.

Can you post pic of the adapter you using to connect pump to pipe as i need to make one.

Its as the engine moves and boost builds that the pipe will leak.

  • Author

Hey dude, well it's not the actual o-ring and lug connector that's actually leaking :(

 

It's where the plastic connector actually seals to the pipe.

 

I'll get you some pics tonight mate :)

Ok so do you have a fault scan or errors appearing?

 

Yes that's a boost leak but I've seen worse.  We need to see what it's like under 20+ psi under load from the engine.  How many psi are you testing with?  If you say there's loads of smoke then that's a symptom from a boost leak.

 

As for fitting silicone to the black pipe, you need a bead on the pipe so unless you can do that it's not going to work.  I'm going to hardpipe mine because that plastic pipe is a disaster.  I've broken 2 of them.

Yea you should test it under at least 18psi and see what it's like. It's a pain though because if you put that much pressure into the intake, you can blow the pipe off from the turbo... bit of a pain to reattach.

Intercooler pipes should actually be tested to around 40psi.

 

However, as we have bad intercooler pipe fittings (all of them), that's not sensible.

 

Not much point really, if you have a leak at low pressure you should get it replaced.

  • Author

I'm not sure how much psi i'm pumping into the system as my gauge on my compressor has broken :(

 

Not sure how i'd be able to bead the plastic pipe, i'm looking at just replacing the plastic pipe altogether now.

 

For the time being is there any like, plastic weld type stuff I could coat the plastic piping in to stop the leak temporarily? 

Yes you could use Lord Fusor.  But a tube of it and the gun to use it costs more than the pipe.

  • Author

Winner, just realised the plastic pipe is actually slightly beaded where i'm going to connect it to! hopefully it will work as i've ordered a 90 degree 54mm silicone bend to try and connect the two eradicating the crap vag connector.

  • Author

Try new oring first

Im guessing the lugs are worn on both hose and plastic pipe.

Allard do a bespoke replacement for that pipe that fits much better than sfs one.

may need to ring them but it seems to be a reasonable price.

Can you post pic of the adapter you using to connect pump to pipe as i need to make one.

Its as the engine moves and boost builds that the pipe will leak.

 

Hey dude finally got those pics for you.

 

CAM00212_zps3eyzuvwo.jpg

 

 

http://i53.photobucket.com/albums/g62/dann2707/CAM00213_zpsikr8na4l.jpg/img]

 

CAM00214_zpsy288twro.jpg

 

 

I still don't know how much psi i'm putting in as weirdly enoughl both gauges I have don't work, even when testing them on my tires.

 

It's definitely not a lot though and it's producing that amount of bubbles.

 

The silicone reducer came with a crappy cone air filter I bought for my Focus a few years ago. The metal part is just a bean tin.

Think I have exactly the same issue with that pipe and loss of acceleration, might try and leak test it tomorrow myself. Seems odd that such small leak would cause such a loss of power, unless of course it's unrelated.

Forgot to ask, you pressurising the system from air filter end (with air box pipe removed)?

  • Author

I thought the same man, but I guess under hard boost lots of air can get out.

Yeah I remove the plastic pipe connecting the intake to air box and fit the boost tester to the intake pipe.

Do you need to remove and block CCTV pipe as well?

CCV pipe, damn auto correct.

  • Author

Mines already blanked off due to the elephantmod buddy

Had the "pancake" pipe off today and sealed up the "holes" where the pipe fits into the bayonet connector with araldite. Will see if it makes a difference in the morning. This is just temporary and if it works I'll order some bits to do the DIY boost hose mod.

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