Heli-Coil Tranny?
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Heli-Coil Tranny?
While tearing my tranny apart so that I can get a crack welded I found one of the studs that mount to the plate has been epoxied at one time and the threads are toast.
i've used heli-coils before but not on a area that is stressed. Whats your guys thought on using a heli-coil on a tranny mount?
Or is it best to weld-fill the hole?
I am concerned that having the hole filled might create to much heat in one spot and cause some warping.
Thoughts?
i've used heli-coils before but not on a area that is stressed. Whats your guys thought on using a heli-coil on a tranny mount?
Or is it best to weld-fill the hole?
I am concerned that having the hole filled might create to much heat in one spot and cause some warping.
Thoughts?
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Re: Heli-Coil Tranny?
Not sure what year tranny you are working on but H-D made oversize studs for just that problem. They are stepped to be larger on the tranny end but the portion going through the plate is as original. What are you working on?
Robbie
Robbie
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Re: Heli-Coil Tranny?
My 31 VL tranny had one of those oversize studs in it, but it was loose, cocked over at about a 10 degrees angle, and it leaked. If it had been properly installed years ago it would still be in there. I put a HeliCoil in it and have not had any trouble, its strong, straight, and it doesn't leak. I installed the coil with plenty of red Loctite. The photo with the tap stuck in it also shows the oversized stud that was in it.
mike
mike
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Re: Heli-Coil Tranny?
1960 Pan tranny.RUBONE wrote:Not sure what year tranny you are working on but H-D made oversize studs for just that problem. They are stepped to be larger on the tranny end but the portion going through the plate is as original. What are you working on?
Robbie
The stud is the oversized type like the one in the pic that flatheadsix has lying on the case next to the tap in the 2nd pic.
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Re: Heli-Coil Tranny?
FatFatBoy!
No matter which repair you choose,
Please seal over the studs on the inside of the case.
Glyptal works well.
....Cotten
No matter which repair you choose,
Please seal over the studs on the inside of the case.
Glyptal works well.
....Cotten
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Re: Heli-Coil Tranny?
Cotten,
I don't know if you have been following the WLA Bobber build that Matt & Carl Olsen are doing for Ryan on the AMCA forum but it is interesting stuff and well documented with some great photos.
A few days ago they coated the inside of the engine cases with some stuff I've never seen before, just wondering if you have any thoughts about what they used.
mike
I don't know if you have been following the WLA Bobber build that Matt & Carl Olsen are doing for Ryan on the AMCA forum but it is interesting stuff and well documented with some great photos.
A few days ago they coated the inside of the engine cases with some stuff I've never seen before, just wondering if you have any thoughts about what they used.
mike
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Re: Heli-Coil Tranny?
good link, thanks Mike
Says its good to 155C (311F) and has good oil resistence. Just wondering if anybody has tried it on an aluminum motorcycle case? (other than the Olsens)
I guess I could ask Carl or Matt how long they've been using it and what it looks like after its been run for a while.
mike
Says its good to 155C (311F) and has good oil resistence. Just wondering if anybody has tried it on an aluminum motorcycle case? (other than the Olsens)
I guess I could ask Carl or Matt how long they've been using it and what it looks like after its been run for a while.
mike
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Re: Heli-Coil Tranny?
You can buy glyptol from Eastwood the auto restoration people.It works better than anything else I have tried.
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Re: Heli-Coil Tranny?
Sorry I haven't been following the "giveaway" build,
(but I know the clutch hub was in good shape.)
I have encountered other coatings that have survived, so I am sure that Dolph's is probably as good as any of them.
My only cause to scratch my chin is that often the rattle-can variety of a coating is not as durable as the stuff bottled without a propellant.
Conditions within a tranny are far milder than in a motor, so a wide variety of goobers may serve well.
It would be prudent to test any motor coating with modern fuel, however, before committing to assembling the motor around it. Even glyptal is not completely resistant, thus focusing enormous importance upon a secure petcock on OHVs.
....Cotten
(but I know the clutch hub was in good shape.)
I have encountered other coatings that have survived, so I am sure that Dolph's is probably as good as any of them.
My only cause to scratch my chin is that often the rattle-can variety of a coating is not as durable as the stuff bottled without a propellant.
Conditions within a tranny are far milder than in a motor, so a wide variety of goobers may serve well.
It would be prudent to test any motor coating with modern fuel, however, before committing to assembling the motor around it. Even glyptal is not completely resistant, thus focusing enormous importance upon a secure petcock on OHVs.
....Cotten
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Re: Heli-Coil Tranny?
Any recommendations for a 'secure petcock'?Cotten wrote: It would be prudent to test any motor coating with modern fuel, however, before committing to assembling the motor around it. Even glyptal is not completely resistant, thus focusing enormous importance upon a secure petcock on OHVs.
....Cotten
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Re: Heli-Coil Tranny?
Glyptalsteinauge wrote:You can buy glyptol from Eastwood the auto restoration people.It works better than anything else I have tried.
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Re: Heli-Coil Tranny?
ErnieTrucker!
Although the puristas would certainly point their stink-fingers in mocking distain,
and the speed-fiends would find it a mental flow restriction,
most sensible folk just put a hardware-store valve in the gasline.
I like MSC Industrial's compression-fit brass needle valves: MSC #: 03004934
....Cotten
Although the puristas would certainly point their stink-fingers in mocking distain,
and the speed-fiends would find it a mental flow restriction,
most sensible folk just put a hardware-store valve in the gasline.
I like MSC Industrial's compression-fit brass needle valves: MSC #: 03004934
....Cotten
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Re: Heli-Coil Tranny?
I don't know about the cases, but looks like good stuff to spray down your 32E armature, you know, the one that still has cloth covered windings? I did that to save one that had an intermittent short years ago, and it's still running fine.
(we now return this thread to its regularly scheduled subject)
DD
(we now return this thread to its regularly scheduled subject)
DD