What is this for?

[oceanic-green]

lookin at the pipes that looks all wrong, that pipe you have arrowed should be connected to the throttle body with a T piece and the other side run up toward the firewall and into the TIP, looks like someone has either done some DIY  noticed the blue silicone going into a black pipe is that for a boost gauge?

take lots more pics of the bay from close and far because it looks like someone has connected pipes into things that shouldnt be from the pics I can see 

Oh Oh sh!te, really !!    Well it wasn't me. I have not touched anything on that side of the bay. I will take some pictures later when I get a chance and post them up. Thanks mate 

My engine is an Aum, could it be a different set up to the other golf 1.8t engines?

Yes that blue into black is for the boost gauge

[Dalo Harkin]

I wouldnt worry about it as yes some engine codes are different routeing of the pipes, Its been running ok up to now so dont worry too much 

Get the pics posted and we can have a look

Pretty much all the piping is under the inlet manifold or connected to the TIP, so you should be able to trace it back to one of those points, most common causes for leaks are the N249 and N112 tubing (the maze under the inlet) and I noticed when I removed my carbon canister I got more boost (guessing one of the pipes had a split) and the last major place is the PCV system, so get a catch can ordered if you haven't all ready done that.
looking at the pic, I would also run a single piece of silicone into the boost gauge, this way its one less connection to cause a leak

[oceanic-green]

I wouldnt worry about it as yes some engine codes are different routeing of the pipes, Its been running ok up to now so dont worry too much 

Get the pics posted and we can have a look

It hasn't been running ok up until now  After I had a service about 6-7 months ago, it was great, then I had the tip fitted shortly afterwards, and it wasn't normal again, I then eventually got the 5 piece turbo silicone hose kit fitted, (by myself) and it was fine again  but only for a few days, then it all went wrong again for no apparent reason, except that I must of developed a boost leak somewhere, so I had the charge pipe and hose changed for an agu one, and then I fitted a Venom induction kit, and did the catch can. None of this made it like it should be! So I then did the N249 bypass, and again it has still not fixed it 

So here we are with some pictures as requested. I hope they help 





The pipe above pointed out with the arrow connects to this metal pipe on the intake manifold that my finger is pointing to in picture below



it comes out here where arrow points to in picture below



It goes to here, see picture below with arrow



Here is a picture of my N249 delete pipe work from under the metal plate

[Dalo Harkin]

First off - get rid of the clutter - you have left the hardlines in even though both ends arent connected, rip it out, the more room you in the bay the more you can see/work on.

Get rid of the SAI - frees up loads of room with those horrid corrugated pipes

run the black boost gauge piping across the firewall to over near the tip and then T into whichever vac you want

Get rid of the carbon canister, again less piping = less chance of leaks

I'll post some pics later of mine and then you can see how mine is, but bear in mind mine is ARZ

[GTi_James]

is that an AUM?

[mikemk4gti]

Yes, third pic down its stamped on the head

[GTi_James]

ahhh missed that, so just to clarify, everything Oceanic-Green has done just removes pointless hoses and simplyfies the engine bay?
i mean, the whole story of Carbon canisters, N249 delete, SAI's remove etc. will that just improve engine response etc and will it throw up codes?

edit: will not be removing SAI's as i read you'd faily emission testing?

[oceanic-green]

First off - get rid of the clutter - you have left the hardlines in even though both ends arent connected, rip it out, the more room you in the bay the more you can see/work on.

Yes ok I see your point, but I am not sure how they come off!

Get rid of the SAI - frees up loads of room with those horrid corrugated pipes

run the black boost gauge piping across the firewall to over near the tip and then T into whichever vac you want

Get rid of the carbon canister, again less piping = less chance of leaks

I'll post some pics later of mine and then you can see how mine is, but bear in mind mine is ARZ

I don't want to get rid of the SAI because as someone else mentioned I would fail emission test.

Good idea about the boost gauge line, I will run it from the dv.

I would get rid of the carbon canister, but I can't see how to do it for the Aum, as the guide on here is for the AGU, and mine is set up different. I can't see where it joins to the tip!

thanks i would like to see how yours looks

Thanks

[jamie1989]

I would get rid of the carbon canister, but I can't see how to do it for the Aum, as the guide on here is for the AGU, and mine is set up different. I can't see where it joins to the tip!

As you look at the carbon canistor the pipe will split "right" to the inlet manifold then "left" towards the bulk head, across the bulk head, down to the bottom of the turbo intake pipe.
The first take off on the turbo intake pipe should the one connecting the carbon canistor mate.

I totally agree ripping all the pointless pipes out will make alot more room to work with.

 

[oceanic-green]

As you look at the carbon canistor the pipe will split "right" to the inlet manifold then "left" towards the bulk head, across the bulk head, down to the bottom of the turbo intake pipe.
The first take off on the turbo intake pipe should the one connecting the carbon canistor mate.

Sorry I am not that mechanically minded, still learning  but if the bulkhead is the back of the engine where the turbo is, then my carbon canister pipe does not go left that way, as I shown in my pictures. It goes to a metal pipe along the the inlet manifold next to the fuel rail, and out the other side where it connects via a blue silicone pipe (as I point out in the next picture) to another metal pipe, which disapeares out of sight