Stripped Exhaust Threads
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RE: Stripped Exhaust Threads - 3/25/2008 9:45:13 AM
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extech
Posts: 625
Joined: 10/8/2007
Status: offline
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I've used heli-coil kits but eventually they'll strip out too. Look for something called a time-sert, it's like a threaded bung, you drill the stripped hole to size and thread the hole and install the sert. These work much better than the heli-coils do.
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RE: Stripped Exhaust Threads - 3/25/2008 11:20:00 AM
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DeJavu
Posts: 2827
Joined: 6/29/2007
From: Bellville, Tx
Status: offline
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If what you call a locking bolt is a triangular rather than round threaded end, yes it would be more likely to strip out(not as much contact on threads, soft aluminum heads). If you don't have one piece 2 into 1 pipes(won't fit over studs), consider using a threaded insert and a stud rather than a bolt. I don't recommend using red loctite on anything going into alum. If you ever have to remove it you will take a lot of alum with it. Blue Loctite is better for alum threads. I use nylock nuts on my Evo exh studs, you'd think they'd melt, but don't and retain well.
IMHO insert+stud+nylock nut, should be bulletproof.
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You find out who your bros are when you ride a kick only bike.
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RE: Stripped Exhaust Threads - 3/25/2008 11:22:32 AM
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Rodney
Posts: 690
Joined: 5/23/2007
From: Central Oregon
Status: offline
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I've used those too it didn't work in my spark plug hole the aluminum was to old and fatigued and when I used the seating tool to crimp the nut zert in the head it destroyed what threads that were left in the head.
you can also drill and tap to 3/8 and install a stepped 3/8 to 5/16 and install the stud. I have had great success doing this. One thing I have found guys doing when installing bolts in holes that bottom out is using to long a bolt, this will pull the threads out of aluminum in a heart beat.
_____________________________
1968 FLH owned for 30 years
2002 FXSTDI
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RE: Stripped Exhaust Threads - 3/25/2008 11:38:17 AM
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ChiefGator
Posts: 1133
Joined: 2/6/2007
From: Cantonment FL
Status: offline
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The locking bolt that I had was a regular round threaded bolt with a Half Moon washer that slid over the head of the both that prevents it from turning. It is held in place by a standard C clip.
I think I may have to go with the stud. I am gonna stop in and talk to my Indy to see what he says too.
Thanx for the advice guys.
_____________________________
As a dreamer of dreams and a travelin'' man, I have chalked up many miles...
Read dozens of books about heroes and crooks, and I learned much from both of their styles...
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RE: Stripped Exhaust Threads - 3/26/2008 6:15:29 PM
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ChiefGator
Posts: 1133
Joined: 2/6/2007
From: Cantonment FL
Status: offline
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Back on the road!
Ended up not putting in a stud. The FLT has a really goofy angle on all the pipes and it looked like it would be a real pain in the pooper to get the pipes over the stud.
Went with a standard bolt and if it works out, I will tighten it. Way better than stripping out the head again.
_____________________________
As a dreamer of dreams and a travelin'' man, I have chalked up many miles...
Read dozens of books about heroes and crooks, and I learned much from both of their styles...
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Stripped Exhaust Threads - 
I hate that.
