F**king exhaust....

[Flaydog]

3 times I've had the thing off now and it's still f**king blowing..

1st, I replaced the manifold to cat kit. It seemed to be worse.

So...

2nd, I swapped the kit bolts and springs back for the old ones, keeping the new gasket. sealed the cat to exhaust joint with high temperature silicon (loctite 5920). The results were better than ever but still a slight blow.

So....

3rd, I got the car on jack stands again..
Removed the cat to manifold gasket and sealed with the silicon. The results: blowing more..

I've checked the entire exhaust and there is no cracks/splits...

The damn thing is impossible. Fred, might need you on this!

 

[murcod]

Try getting one of those two piece clamps for the rear cat join (they're on Ebay UK.) Makes it a lot easier to seal it properly.

Have you checked the front heat shields to see if they're touching the headers under load? That was a noise source on mine at high revs (a bit of heat shield bending fixed it.)

Apart from that I just used some copper silicone like the loctite stuff and it fixed mine. I didn't have problems with the front cat join though.

 

[bartebk]

Got the same problem,blowing from cat to exhaust.Pain in the arse!

 

[murcod]

http://cgi.ebay.co.uk/RENAULT-CLIO-...s_SM?hash=item1c0c7d7fe7&_trksid=p3286.c0.m14

 

[Flaydog]

Got the same problem,blowing from cat to exhaust.Pain in the arse!

Tell me about it 3 times I've had it apart and it's no better

http://cgi.ebay.co.uk/RENAULT-CLIO-...s_SM?hash=item1c0c7d7fe7&_trksid=p3286.c0.m14

Thanks mate. I'm already using one of these and I've sealed it with the copper silicon stuff.

More than certain the blow is coming from the cat/manifold join to be honest.

 

[rich_1989]

yep mine is blowing here, with i added affect off a streched spring do the bolt rattles like a mofo

 

[Sheila’s’ Wheels’]

If you have knackered engine mounts, it will cause too much movement and the exhaust will break all of its seals.

Thought of that?

 

[Flaydog]

If you have knackered engine mounts, it will cause too much movement and the exhaust will break all of its seals.

Thought of that?

Yeah thought about that but all the engine mounts seem to be fine. Gear change is smooth and there seems to be no play in wengine movement. Guess it could be the problem..

I've just had her up on stands again and had a good look round. Everywhere appears to be well sealed.

Maybe it's all in my head!!!

 

[Fred@BTM]

haha frustrating ain't it! if you need to whack it on the ramp so we can reseal it just give me a shout

 

[Flaydog]

haha frustrating ain't it! if you need to whack it on the ramp so we can reseal it just give me a shout

Cheers Fred. Might just do that. You about on Wednesday or Thursday?

By the way, got my service book okay. Thanks for that just need to get you PDQ sorted!

 

[Chrisjk]

What is the cat kit like compared to your old one, i changed mine today(early ph1) and noticed the new kit from ktec was about 1cm shorter than the origional that came off, meant it sealed up a hell of a lot easier. I'm assuming there was a revised kit introduced at some point.

 

[Flaydog]

The bolts were shorter as you described and the springs didn't look as good a quality. I tried them first and then reverted back to the old bolts and springs which gave better results.

 

[Jonny1*2]

http://cgi.ebay.co.uk/RENAULT-CLIO-...s_SM?hash=item1c0c7d7fe7&_trksid=p3286.c0.m14

That's the one I was trying to remove tonight. Pain in the arse. I'll probably use the same one again though.

Oh and I'm sure I've heard somewhere that putting silicon before the CAT isn't a good idea? Might be wrong though. Mine blows from the mani join also. Best way to notice is on a cold morning, when the engine is hot, rev it while looking at the joins. Good to know the old springs worked better though. I'll keep hold of them for when I reattach my modded CAT, or decat depending on which I decide to use

 

[Flaydog]

That's the one I was trying to remove tonight. Pain in the arse. I'll probably use the same one again though.

Oh and I'm sure I've heard somewhere that putting silicon before the CAT isn't a good idea? Might be wrong though. Mine blows from the mani join also. Best way to notice is on a cold morning, when the engine is hot, rev it while looking at the joins. Good to know the old springs worked better though. I'll keep hold of them for when I reattach my modded CAT, or decat depending on which I decide to use

Yeah I have heard this too about the silicon between the mani and cat but I think it's been done a few times. Not sure the silicon can take the heat from the mani to be honest. Will know more on Saturday as I've got my MOT... Fingers crossed on the exhaust emissions test!

 

[Jonny1*2]

which cat fitting kit did you use? k-tec? It's wierd how there is a gasket of sorts, when standard one doesn't have one, and there seem to be miles more bits than what came off the car :S

 

[Hutchie]

never had a problem with these joins.

bartebk you know where i am if your stuck

 

[WILLIE]

I had a similer problem with mine. I found the main blowing coming from the manifold/cat join. Used metal poxy heat resistant and its been fine ever since.

Still, it took me a good few months to spot where it was coming from which was the annoying thing.

 

[Flaydog]

which cat fitting kit did you use? k-tec? It's wierd how there is a gasket of sorts, when standard one doesn't have one, and there seem to be miles more bits than what came off the car :S

I got the kit from a local parts place (leamoco), however the bits should be the same as from K-tec.
Should come with -
2 x bolts
2 x cups
2 x fibre washers
2 x metal washers
2 x springs
2 x caps
2 x nuts
mesh gasket
which is exactly what should come off the car.
Mine came with the clamp that holds the Cat to middle section too, don't think this comes with the K-tec kit.

 

[Jonny1*2]

I got the kit from a local parts place (leamoco), however the bits should be the same as from K-tec.
Should come with -
2 x bolts
2 x cups
2 x fibre washers
2 x metal washers
2 x springs
2 x caps
2 x nuts
mesh gasket
which is exactly what should come off the car.
Mine came with the clamp that holds the Cat to middle section too, don't think this comes with the K-tec kit.

Ah right. Yeah sounds about the same bit wise. what you pay for it?

 

[Flaydog]

£5.95! Like I said the springs were quite as good a quality as the originals but everything else was good