4-2-1 and decat sealing

5th September 2011, 19:59

Right i'm running a 4-2-1 manifold as pictured below, with what I think is a supersprint decat pipe. I cant seem to get the manifold to decat join to seal properly - the wire gasket seems OK but even with the bolts fully tightened up it blows like a bugger. The manifold opening has a flared edge but just seems slightly too small to accept the wiregasket.

Ive the bolts as such:

Bolt through manifold flange
spring
bolt keeps going through decat flange
cup washer
nut

Anyone got any advice as to why this may be?

5th September 2011, 20:04

force the wire gasket to fit?

or smuther the joint in exhaust paste?

ive got some paste on my centre to back box join as it was blowing and it just wouldnt clamp tight enough with the gasket, seems to do the trick, been on for about 6 months now and still no blowing

5th September 2011, 20:19

Quote:

Originally Posted by rick_VTR

force the wire gasket to fit?

or smuther the joint in exhaust paste?

ive got some paste on my centre to back box join as it was blowing and it just wouldnt clamp tight enough with the gasket, seems to do the trick, been on for about 6 months now and still no blowing

bloody well hope not

5th September 2011, 20:20

It wont tighten down enough for a "force fit" so to speak

5th September 2011, 20:25

Quote:

Originally Posted by corey-b

bloody well hope not

i think its the wrong clamp for the joint tbh mate.

the old one snapped and i found this one, but when we swap the exhaust you can keep your clamp and ill keep my shit one, its made of really soft metal and im so strong it fucked the thread when i was tightening it so used some paste to stop it blowing haha.

the exhaust fits fine mate, honest aha, and i will take some pictures tomorrow night if its not pissing down bud

5th September 2011, 20:26

i dont have a gasket or paste on mine, gasket wouldnt fit at all but the two pipes fit perfectly together :$

that a bad thing???

5th September 2011, 20:28

Quote:

Originally Posted by rick_VTR

i think its the wrong clamp for the joint tbh mate.

the old one snapped and i found this one, but when we swap the exhaust you can keep your clamp and ill keep my shit one, its made of really soft metal and im so strong it fucked the thread when i was tightening it so used some paste to stop it blowing haha.

the exhaust fits fine mate, honest aha, and i will take some pictures tomorrow night if its not pissing down bud

ahhh no probs mate

got shit loadsa clamps lying around anyway.. and yeah try get sum pics

5th September 2011, 20:29

Quote:

Originally Posted by mlawlan69

i dont have a gasket or paste on mine, gasket wouldnt fit at all but the two pipes fit perfectly together :$

that a bad thing???

aslong as its not blowing... why not mate lol

5th September 2011, 20:29

i had similar problem when i put my cat converter back on after using a decat pipe, what i do is put some washers on the bolts and it seems to get it tighter,cant remember what side of the bolt but make sure the washers are big enough to feed down past the thread and the smooth bit right up to the head of the bolt, im using a few washers and its worked a treat.

5th September 2011, 20:33

I'll have a look at it tomorrow, rain stopped play today and I couldnt be arsed moving the 182 out of the garage. Also one of the springs that goes against the bolts is coilbound...no problem though I've just nicked one from the 182s exhaust mount as thats was I was using to achieve a nice straight exhaust! I love free fixes

5th September 2011, 20:34

Quote:

Originally Posted by Gandi699

I'll have a look at it tomorrow, rain stopped play today and I couldnt be arsed moving the 182 out of the garage.

worth a try anyways washers are cheep to get lol. like i said works for mine lol. can be really fiddly though, just get as many washers as you can on, fingers will kill after though haha

5th September 2011, 20:35

Quote:

Originally Posted by corey-b

ahhh no probs mate

got shit loadsa clamps lying around anyway.. and yeah try get sum pics

thats alright then.

me and the mrs are still planing on going to harrogate weekend after next if your still up for it?

*sorry for hijacking this thread*

5th September 2011, 20:42

I cant use larger bolts with my manifold though, its got tiny holes

Also should I fit the cat instead? Not sure my MOT will pass it plus my cat has "NOT FOR ROAD USE" emblazoned on the side so if I ever get pulled I'm fucked?

5th September 2011, 21:35

there are different sized wire gaskets that are dependent on the centre section.

50mm is standard? slightly larger for supersprint. Check kamracing.co.uk for the correct fitting.

I wouldn't worry about fitting a cat for mot... I took mine in for it's mot recently and it passed fine.

With regards to washers mentioned above, i put 2 on each bolt. If when you tighten the 'cup' down to meet the spring, if the spring still rattles and the 'cup' is at the bottom of the thread then it's never going to tighten. Therefore put a couple of washers on before the spring. So poke the bolt through, a couple of washers, spring, cup and finally nut - In that order.

hope that helps.

5th September 2011, 21:42

Quote:

Originally Posted by RyanSaxo

With regards to washers mentioned above, i put 2 on each bolt. If when you tighten the 'cup' down to meet the spring, if the spring still rattles and the 'cup' is at the bottom of the thread then it's never going to tighten. Therefore put a couple of washers on before the spring. So poke the bolt through, a couple of washers, spring, cup and finally nut - In that order.

hope that helps.

think it was that order i did it lol i honestly cant remember. all i know is it worked on mine haha

7th September 2011, 20:36

I got a cat fitting kit from citroen the otherday £12 and the gasket is ceramic

much better than any otf the wire ones ive had in the past

Had to cut the springs too