block thread for coolant plug stripped...

[Rockter]

Thanks guys.
I trust that JB Weld is available in the UK.
I will check.
I think it is the easier option.
If it fails, I can enlarge the hole, and go for the next size up, then use a reducer, as discussed.

[dabnis]

Originally Posted by Rockter

Thanks guys.
I trust that JB Weld is available in the UK.
I will check.
I think it is the easier option.
If it fails, I can enlarge the hole, and go for the next size up, then use a reducer, as discussed.

If not, I think Marine-Tex is pretty close. I did a Google search on "JB Weld or equivelent" and found some alternatives, Loctite, Permatex and others. let us know how it works out.

Dabnis

[hellosailor]

Rockter, JBWeld is a respected old brand name in the US, but it is just a high quality two-part epoxy with, I believe, metal powder mixed in to give it better abilities for resisting heat and forming a hard filler.

MarineTex or any high quality epoxy would do, there's almost always a brand name product in auto shops that is designed for heat resistance, i.e. for radiator, engine, exhaust repairs. Not a putty but something in tubes, so it is easier to get it grabbing into the old threads, etc.

With any adhesive product, I'd emphasize SURGICALLY CLEAN surfaces, and then toothing them up a bit with rough sandpaper and cleaning again, so the material really gets the chance to grab and adhere. Like painting--it is all in the prep if you want something you can rely on for 20+ years. (I've got some epoxy repairs twice that age that are still holding.)

[TQA]

Yup JB Weld can be found in the UK.

Part No. 8265-S is the standard one that I have used but I guess the other variants would do to.

[landmineop]

I still like the Helicoil idea. I do not like the idea if metal shaving NEAR any place to get in my engine.

[LakeSuperiorGeezer]

Originally Posted by Rockter

Thanks guys.
I trust that JB Weld is available in the UK.
I will check.
I think it is the easier option.
If it fails, I can enlarge the hole, and go for the next size up, then use a reducer, as discussed.

Since a pipe thread is tapered, you could try a 1/8 BSPT tap or whatever it is and run the tap in further. Maybe you could get enough thread to get a better grip and then JB Weld. First check to see how deep you can go into the water jacket. The tap might bottom out against the casting or does this have a cylinder sleve. Do not force or you could push into the cylinder outside. If a cylinder sleve, you may have to pull it to get enough clearance to run a tap in there whatever the size of tap

[Rockter]

Guys :

Thanks for all the help. The plug held all season with just thread tape stopping it from blowing out. It really is quite loose in there and doesn't bite. There isn't much pressure to fight though, and that has made such a loose fit servicable.

I will wait to the spring, and heat gun it to get it dry and very clean, then I will try the JB Weld, or similar.

I get tempted just to glue it in there with the JB Weld. It would probably work.


Rockter.