Thread repairs/sealing

[qbazdz]

Hi,

I bought a 2nd hand bay res, which unfortunately came with one of the outlet ports a bit mangled (Acetal).
I had only rebuilt the loop last night so have not been able to check for leaks yet but wonder how is people experience with sealing in cases like this?
I can see about 1-1.5 threads (at the bottom of thread length) that are usable and when I finally made the plug fitting arrive fairly square and compress the o-ring it 'felt' decent enough. Under pressure it may be a different story altogether though..

One of the potential options is to get this port opened up to G 3/8 (if you have tools or know a guy ) but I only found a single Koolance G 3/8 male to G 1/4 F adapter..

Thoughts?
I'll report on leak testing most likely tomorrow

 

[Mcnumpty2323]

Have sealed one in the past
I used some sort of sealant from a local car factors
Though don't remember the name of the stuff
But it was rated for very high temperature
And pressure and didn't set brittle when dry
I put in a g1/4 to g1/4 female adapter
As once it was in there it wouldn't come out
Without using a lot of force
Though I did test in a small loop I set up in kitchen sink overnight
I wouldn't have risked actually testing in my pc
Just in case
It stayed sealed for couple of years
And was still fine when I retired it for something new

 

[Too Tall]

I'd be masking around the hole not to contaminate the polished surface and then filling then hole with an epoxy and drill/tap it.

But u wouldn't really want to do it at all.