Checking Boost Leak/Replacing Hoses

[djscorch]

Hi All, I’m wondering if we could collectively put together a useful reference document of vac/boost pipes to check for leaks and the size of silicone hosing required to replace them (where applicable).

I’m doing this for 2 reasons, selfishly I have a boost leak and would like to use the collective knowledge of SCN to hunt it down. Unselfishly I think it would be a good document to consult if anyone else has a boost leak they need to find in the future.

After some searching I came up with…(Corrections Welcome)

Top of DV – 3mm ID
Around N75 – 3mm ID

Thanks

 

[Jonzy]

Mines silicone 3mm all round.

 

[David_smith_909]

mines 4mm all round, can be between 3mm and i have read people using 5mm

make sure you check all vac pipes etc ... also all ic piping etc ....

where in manchester are you? im in st helens (not too far away) with vagcom also if you get stuck

 

[Sharky_82]

sorry to divert slightly, ive just brought some samco hosing (3mm bore), can i replace piping that have different size bore as the bay looks abit bland.

 

[David_smith_909]

sorry to divert slightly, ive just brought some samco hosing (3mm bore), can i replace piping that have different size bore as the bay looks abit bland.

i wouldnt, if you replace a 7mm pipe with a 3mm one ........... ul restrict it, its 7mm for a reason (just a example)

 

[Sharky_82]

does anyone know where i can get my pipes replaced....not being a lasy a$$ but trying to measure up the different pipes bore size can be long winded.

 

[David_smith_909]

what pipes do you want to replace?

speak to philw, he has replaced just about everything

 

[Sharky_82]

any pipes to brighton up the bay...piping for DV valve, for the N75 valve, etc. Have contact a company called extreme in harlow and they said to pop down and they will have a butchers...will PM philw to see how he went about it.

cheers guys..

 

[PhilW]

First post is wrong. N249 vac pipes are 3mm, not N75. N75 connections are 8mm


More info posted here...

http://www.seatcupra.net/forums/showpost.php?p=1096559&postcount=10

 

[Sharky_82]

phil...nice work on the enginer bay.... where the turbo pipe thats comes over the head, uve got a small filter that covers the air pipe....where did u get it from as im having trouble finding some1 who selles them individually

 

[PhilW]

A breather filter? Most car shops will sell those mate.

 

[Sharky_82]

cool, will spend the weekend with a tape measure, pen and pad to start work on piping

 

[djscorch]

mines 4mm all round, can be between 3mm and i have read people using 5mm

make sure you check all vac pipes etc ... also all ic piping etc ....

where in manchester are you? im in st helens (not too far away) with vagcom also if you get stuck

Cheers mate, i'll take you up on that VAG COM offer

 

[David_smith_909]

Cheers mate, i'll take you up on that VAG COM offer

anytime mate, just pm me when you need it and we will arrange a meet

 

[djscorch]

First post is wrong. N249 vac pipes are 3mm, not N75. N75 connections are 8mm


More info posted here...

http://www.seatcupra.net/forums/showpost.php?p=1096559&postcount=10

Hi mate, nice bay. Where did you get the 3mm stuff from?

 

[David_smith_909]

Hi mate, nice bay. Where did you get the 3mm stuff from?

forge, silicone hoses, samco and many more .................

 

[PhilW]

i got mine from Samco.

Try ebay tho.

 

[djscorch]

Reckon this'll do the job?

http://cgi.ebay.co.uk/Blue-Silicone...ryZ72205QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

 

[David_smith_909]

Reckon this'll do the job?

http://cgi.ebay.co.uk/Blue-Silicone...ryZ72205QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

 

[David_smith_909]

Hi All, I’m wondering if we could collectively put together a useful reference document of vac/boost pipes to check for leaks and the size of silicone hosing required to replace them (where applicable).

I’m doing this for 2 reasons, selfishly I have a boost leak and would like to use the collective knowledge of SCN to hunt it down. Unselfishly I think it would be a good document to consult if anyone else has a boost leak they need to find in the future.

After some searching I came up with…(Corrections Welcome)

Top of DV – 3mm ID
Around N75 – 3mm ID

Thanks

met up with adam earlier today

checked for any faults with vagcom, no errors, done some logging on the following:-
request vs actual boost, maf values and intake temps

temps went through the roof doing a 4th gear run from 1.5k to 6.5k but this is due to standard smic i think, checked all pipes/hoses and request vs actual boost confirmed no leaks, maf values peaked @ 140gs (put this down to having standard airbox with no custom feed) (running revo stg1 fyi)

however, during the run he was getting a very noticable hsssssing noise ONLY when under load, which appeared to be coming from aroung the brake servo hose area when doing logs, he has had this replaced with a new part, seems to have been installed correctly, had a good nosey around and their doesnt appear to be anything wrong at all

anyone have any ideas?