exhaust thread buggered

mirax · Scooby Slapper Joined: 13 Jan 2005 Karma :

the exhaust thread where the studs go into the exhaust manifold on my dt is buggered half of it is chewed up whats the best way in fixing it ?

Simonbt · Nitrous Nuisance Joined: 10 Mar 2005 Karma :

easiest way - Get a new barrel

Is it just the studs that are stripped or the actual manifold?

alains · World Chat Champion Joined: 08 Jul 2004 Karma :

you can either taper it at the over diameter (7x100 for 6 , 8x125 for 7, 10x150 for 8 ) or buy special helicoïdal thread (very expensive)
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mirax · Scooby Slapper Joined: 13 Jan 2005 Karma :

yeah its the manifold thread not the stud thread

viper61 · L Plate Warrior Joined: 21 Jun 2005 Karma :

Or you could just try a tap down it with loads of wd40 or even better some proper cutting compund such as rocol (i think). Depends how bad the thread really is. We have done this at work on mullered manifold threads before and has worked fine. You may have to use a die on the stud though as well.

Rob

mirax · Scooby Slapper Joined: 13 Jan 2005 Karma :

how much would i expect to pay if it needs a helicoil ?

ZRX61 · Victor Meldrew Joined: 05 Nov 2003 Karma :

tatters · Exxon Valdez Joined: 04 Jan 2004 Karma :

mirax · Scooby Slapper Joined: 13 Jan 2005 Karma :

thats the 1, nut got propper stuck on and had to extract the stud, all went fine until i put it back in. it was tigntening ok untill the stud felt loose used hardly any pressure did what i was meant to tightened it by hand then the fucking stud ate the thread

viper61 · L Plate Warrior Joined: 21 Jun 2005 Karma :

Perhaps you can drill and re-tap then re-stud with a different size stud. You will have to drill the other exhaust fitting too though. Sounds like a helicoil or timesert would be best though as the other guys say. You can get the kits yourself but if you dont use them much it may be cheaper to take to a dealer or garage / workshop and see if they can do it for you.

ZRX61 · Victor Meldrew Joined: 05 Nov 2003 Karma :

You can get studs with different size threads on the ends. So ya could (ferinstance) have M6 on outside for the nut & M8 screwed into the barrel.. saves fucking about with helicoils...

mirax · Scooby Slapper Joined: 13 Jan 2005 Karma :

cheers guys for the insight might try and go for the option ZRX61 metioned

viper61 · L Plate Warrior Joined: 21 Jun 2005 Karma :

Yeah that would probably be easier i'll agree. Worth looking around for some on the net perhaps they may be cheaper. Just measure the one you need.