air leaks...

[Ski]

Whats the best way to test for air leaks without taking off the hoses...

soapy water?

[zlobo]

the easyest way is to make a pressure tester, that you insted of the maf. but be careful dont put in more pressure than 1bar. i used i valve from a tyre. if you are intrested i can attach some pictures.

[Ski]

but im guessing this test will tell me if i have a leak or not, but wont tell me which hose is actually the problem?

I'll rephrase..

Whats the best way to find air leaks without taking off the hoses...

[maRS2]

use air leak tester to put pressure to the sytem an put water with soap on all connections and look for bubbles

[Ski]

are air leak testers expensive? where can i get one from? can i not just rev the engine a little instead? saving my money for a gasket jobbie

[Pisobiker]

Ski,

there is no way you can push some pressure out of the turbo with the car steady. If car isn't running, power requirements for revving the engine is not enaugh to have exhaust pressure spining the turbo fast enaugh.

Again, only way to test for leaks is applying pressure from MAF-to-turbo hose with the top part of the crossmember-to-upper pipe and the breather hose plugged with a cap.
This way you will be able to test
1) MAF to Turbo hose;
2) Turbo to IC pipe (including part going to DV valve);
3) IC O-ring;
4) Cross member to upper pipe hose.

For the TB and the ISV hoses you have to carefully inspect them taking them off. Take a look also at all the thiny hoses that go from IM to DV, ECU and aux systems. Any sign of damage might suggest you change the whole lot.

This is how I managed the "leak testing" device:

http://www.s2forum.com/forum/showthread.php?t=1860

Ciao

Marco

[Ski]

Hmm... well.. its almost done 184k so i think i will be better off just geting the samco's

Handy device u created there But after consideration, the sanco's will be needed sooner or later anyway.

[zlobo]

you wil hear the leak and feal it.

[Greg_S]

Managed to fix my leak today. Had an idea what was causing it but turned out to be two problems.

One was the small pipe from the head to the DV and the other was that I hadnt done a hose clip up on the throttle body pipe from last weekend when I changed the thermocouple nice easy fix with the help of a screw driver though

Also got my new thermo couple fitted too, got an account with lab facility today so its cheaper to get hold of them now too.

Greg

[Ski]

im guessing if my boost limiter is kicking in then it can only be a leak problem?

Could it be some sort of sensor?

[blu_s2]

Could it be some sort of sensor?

A faulty MAF can cause the same issue, but it's usually a leak.

[Ski]

ok cheers lads