Perrin catback v-band's nut issues
 

Hi guys,

I have asked my Subaru dealer to install Perrin catback and looks like that they screw it somehow.. After two days, exhaust was louder and louder and i assumed that there is leak.. I found somebody to check it and tighten vband. But next day, it was louder again..

So I guess that nut is broken and will untighten again.. Do you know, if this nut could be fixed by some locklite or I have to import new nut to Europe :( Or its better to buy new v-band ?

Thanks for any ideas


P.S i should install it by myself, but I was scared like hell to do it :bonk:

why no DIY?

I've had no experience with Perrin products, but I'm sure a exhaust shop could at least point out the issue for you. I had a leak on my catback and the guy charged me five bucks to find it and fix it. If it is the nut, they could still supply some alternative clamp...

Interesting, I just installed mine a few days back. They shouldn't come lose considering they use lock nuts on the clamps. You are going to have to look under your car and see whats going on to truly know or take it somewhere.

get a new vband clamp after adjusting it a lot or tightening it incorrectly the bolt will strip the threading had this happen after swapping a perrin in and out a few times between me and a buddy's car

keep in mind the torque specs on perrin's v-bands are in In/Lbs not Ft/Lbs! Replacing them may or may not fix the issue. Are you by chance tuned? I thought I had an exhaust leak for the longest time but it ended up being odd intermittent resonance in my perrin exhaust. Not sure what the common factor is but it only occurs from time to time.

Thanks guys..

Looks like nut was not working properly and we have fixed it by locklite.. Anyway, going to order new v-band just for sure ;)

Best
Roarke

Most v-bands come with a cadmium or silver plated lock nut. These lock nuts are typically one time use. The loc-tite may not solve the problem permanently. Depending on which type you used, the loc-tite could burn off.

V-bands are great but do require some extra attention during installation. V-bands usually have 3 separate v-shaped channels, during installation these engage the v-band flanges. During the torque procedure it is important to stop and tap them lightly with a hammer this helps to set the v-band clamp and prevent any leakage through the flanges. It also makes the job of the lock nut a little bit easier.

Hope that helps some.

Thanks very much.. Im really suspicious now and dont know if this deep sound is because Perrin or because leak :(


Now. I have to find somebody who can ship V-band to Europe :(

Thanks again

I'd just msg Perrin and purchase new vbands. They can be delicate if you're just torquing away at them without paying attention to the specs - they'll have thread left in them when tightened properly but I can see how a mechanic unfamiliar with it could bottom it out and compromise the assembly.

When installing V bands, you will have to be careful not to overtighten them, we actually just hand tighten them with a nut driver and they seal great.

V bands can be kind of hard to find, but we can either ship one out to you, or check with Scoobyclinic, they may be able to help you out as well, they are in the UK.

The point of v-band clamps is they're pretty foolproof. If they are on right they aren't going to leak unless they are VERY loose. If there's a leak there has to be something wrong other than just not being tight enough.