SX-A thread repair

J

Jeff J

Petty Officer 2nd Class
Joined
Jun 23, 2021
Messages
147
I had to go to NAPA. If the constant supply of air through the bottom plug hole and the grease on the drill and tap worked as intended I should be in good shape. Thanks for the help.
 
J

Jeff J

Petty Officer 2nd Class
Joined
Jun 23, 2021
Messages
147
Not such a great repair after all. It is leaking just sitting in the shop. This is the first time I ever have been grateful the gear oil is serviced above a vent hole. This would have gone unnoticed until I drained the water out of it in 100 hours. Need a different plug and seal than stock to cover the wider hole for the helicoil.
 
Scott Danforth

Scott Danforth

Grumpy Vintage Moderator still playing with boats
Staff member
Joined
Jul 23, 2011
Messages
51,140
Get a threadsert vs a helicoil and use retaining compound. The oil leaks up the spiral
 
J

Jeff J

Petty Officer 2nd Class
Joined
Jun 23, 2021
Messages
147
Not sure I want to risk digging the helicoil out at this point. I never had one leak like this (not the first time I put a helicoil in a wet location). I’m still not convinced the plug isn’t metric. It fits the new threads pretty loose while a 3/8” bolt sits a little tighter.

I drilled out the chamfer the o-ring is supposed to seal against. A Suzuki seal with the original plug may work but I am thinking a 3/8”-16 pan head screw would be better. It’s a shame the Suzuki plug uses a different thread. Had I thought I would run into trouble I would have installed threads for it.
 
J

Jeff J

Petty Officer 2nd Class
Joined
Jun 23, 2021
Messages
147
No real pressure in this application so I would be willing to try a threadsert but I do not see how one would change the problem. There still would not be a good mating surface for the o-ring. Not on the inserts I have seen anyway so a gasket would still be required.
 
B

BRICH1260

Lieutenant
Joined
Jul 6, 2011
Messages
1,394
Try coating the threads with a liberal amount of Tripple Guard grease. It may just give you the seal you need.
 
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