Hose clamps good enough for new exhaust flexi section?

[RR76]

My current flexi exhaust section has a hole.

I didn't realize a new flexi section alone could be fitted with just hose clamps as opposed to welding.

Are these clamps sufficient enough iyo to seal the exhaust?

[bangerhoarder]

Jubilee clips? I've seen them used for exhausts, not a good look IMO. Don't see how they'd tighten enough.

When I replaced the exhaust flexi on a Puma with a replacement section I used exhaust clamps and a smear of sealant.

[donkmeister]

If you are talking about exhaust band clamps, then I've certainly used these on motorbike exhausts however not in its own...

First time it leaked, and following advice from someone who had done a lot of bike exhausts I used a product called Gun Gum between the two sections before sliding one into the other, then the band clamp slid over and was tightened.

It's just a sealant paste, so you need the clamp as well.

[GreenV8S]

RR76 said:

Are these clamps sufficient enough iyo to seal the exhaust?

Hose clamps - no.
Exhaust clamps - yes, assuming the parts fit reasonably well and the outer one is designed to be clamped down.

[RR76]

GreenV8S said:

RR76 said:

Are these clamps sufficient enough iyo to seal the exhaust?

Hose clamps - no.
Exhaust clamps - yes, assuming the parts fit reasonably well and the outer one is designed to be clamped down.

Yes exhaust clamps.

[tapkaJohnD]

Look at Mikalor clamps: https://mikalorcompany.com/

Wide for good grip, 'high pressure' and stainless steel

[donkmeister]

Can't help noticing only two of us mentioned using a sealant paste when using exhaust clamps - is that not always required?

I've only done an exhaust without it once, and that leaked a little. Subsequent ones I've used it and never had a leak with those.

[Krikkit]

donkmeister said:

Can't help noticing only two of us mentioned using a sealant paste when using exhaust clamps - is that not always required?

Not with well-fitted slip joints, no.

On bikes with shorter exhaust systems and less stringent MOT requirements, a little cold leakage is acceptable, and therefore the tolerances can be a bit wider.

On cars with comparatively long systems you need tighter tolerances, so that they'll be well sealed for emissions testing, but there are OEMs that use them. JLR, BMW and a couple of other cars I can think of.

A big factor in getting them sealed is the positioning of the clamp, you need them as close to the slit in the band as possible.

Edited by Krikkit on Thursday 17th October 16:01