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Exhaust header stud

AlanNZ

AlanNZ

Cruisin' Guzzisti
GT Contributor
Joined
Sep 20, 2013
Messages
227
Location
Auckland
I lost a header stud and the other nut on my Falcone yesterday riding home. I think one of the threads In the head may be worn. What's the recommended fix. Helicoil and replace the stud with high temperature loctite plus lock wire the nuts? Or no compound on the studs?
Alan NZ
 
If there is enough meat in the head, use a time sert http://www.time-sert.com/ They are more robust than a helicoil, but require a larger drill hole to tap and install. You will probably need a bottoming tap to make the final threads for the insert. I don't think red loctite (271) would do much due to the temperature reached in that area.
 
I would use a Helicoil first. That way if anything goes wrong in the future and there is enough meat to use a Time-sert you can go to that later. I would not use the thread lock as if the stud broke or stripped it would be not much fun to remove it. If you do insist on a thread lock they do make high heat versions but I think the temperature reached on an older air cooled single right at the exhaust would far exceed the rating. I think lock wiring is the way to go if you want to stop it happening again.
 
Hi Alan,
Just saw you were online - are you travelling down to Wanganui street races on Boxing Day?
I'm trying to get my 1100 Sport ready but being dogged by a possible faulty coil grrrrrrrrrrrr
I see you have an interesting collection of Guzzi's
 
I have been using nyloc nuts on exhaust studs forever with good results. The nylon does melt a bit; but I still have the same ones since the late 80's. If you put a lock washer below the nut, that would prevent the stud from coming loose as well. I like star washers, they have more points for grip.
 
Bigbear said:
Hi Alan,
Just saw you were online - are you travelling down to Wanganui street races on Boxing Day?
I'm trying to get my 1100 Sport ready but being dogged by a possible faulty coil grrrrrrrrrrrr
I see you have an interesting collection of Guzzi's
Click to expand...
No didn't get to whanganui. Have been doing a few local rides on the falcone. Not been riding the other guzzis at all.
 
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