[SEL] Stripped stud

[MaytagTwin at aol.com]

Hi George,
I think the determining factor is what temperature  will the stud reach 
when you are operating your 12hp Ingeco.  For repairs  where temperature is not 
excessive I have had good results using  either Devcon Plastic Steel or JB 
Weld.  
 
Acquire a new stud of the original size.  Then,  clean the worn area 
thoroughly including degreasing with something like brake  cleaner or (if you can 
find it, CCl4).  With a wire brush wheel polish the  threads on the new 
stud, then apply a coat of paste wax or other material to  service as a mold 
release.
 
Mix your epoxy and be sure to coat the worn area using  a stirring rod or 
other tool to work the epoxy into the worn area.  Apply  epoxy to the new 
stud and then screw it into the hole, wiping the excess off  before it hardens. 
 After it has set you should be able to screw the new  stud out of the old 
hole (double nut it to get a grip) and find the epoxy has  formed new 
threads.  You can lubricate them with something like moly or,  just leave them 
alone.  
 
I have had success with this method in repairing  stripped threads in water 
cooled engine blocks and, repairing worn axle shafts  where the splines had 
been eroded by salt water.   
 
Hope this helps.
 
Ron Carroll
Clearmont, MO USA
 
In a message dated 4/20/2009 1:15:13 PM Central Daylight Time,  
George_Best at adp.com writes:

Sorry,  but this isn't an off topic thread ;-)

The exhaust stack flange on my  12hp Ingeco is held in place by two 1/2"
studs to the engine  head.

Unfortunately, the upper stud is missing and the hole is pretty  well
stripped out with only a trace of threads still showing.  Only  the back
of the hole still has enough thread left to hold a bolt in place  when
pulled on by hand.  I'm sure if you put a nut on the stud the  little bit
of thread wouldn't hold any pulling force.

I'm debating  on how to fix it.

I could coat a 1/2" stud with JB Weld and put in  place and let it cure,
hoping it will be strong enough to hold the exhaust  stack in place.
Remember there is still one good stud so the JB Welded one  is getting
some help from the other stud. 

Or.....

Rethread  the stud hole for a 9/16" stud and then cut down the other end
of the stud  and thread it for 1/2". (make a stepped stud, assuming the
hardware store  doesn't already stock stepped studs)

I'm thinking rethreading for the  larger size is probably the better way
to go, but was wondering if anyone  has tried the JD Weld method and had
it  work?

George


 
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