F engine freeze plug not setting (1 Viewer)

[Lifelong40Fan]

I installed OEM freeze plugs (96411-45000) in my f engine and they don’t set in all the way. This doesn’t look right, but they won’t go in any further. I did put a light coating of permatex pipe dope on the hole lips, but that shouldn’t be the problem if there is one. Any ideas?

Thank you!

Mike

 

[rainingagain]

What year engine? The early ones used 90330-50018, which does not have the lip.

 

[middlecalf]

Mike - More info herein wrt early F motor freeze plugs @rainingagain points to:

Hey everyone.....new to the forum and looking for some help. - https://forum.ih8mud.com/threads/hey-everyone-new-to-the-forum-and-looking-for-some-help.1188391/.

Dish looking thingys, 90330-50018.

Paul

 

[Lifelong40Fan]

It’s an f145. A ‘69 I believe.

 

[middlecalf]

Oops, sorry for the non-sequitur Mike.

 

[65swb45]

You need the dish plugs @middlecalf posted the pic of.

 

[Lifelong40Fan]

Thanks guys. I ordered a set. One question though. When I install, the curved side goes into the engine, right?

 

[charliemeyer007]

I think the dome faces out, so when you pound on it with the correct size socket it will swell and fit tight

 

[rainingagain]

I think the dome faces out, so when you pound on it with the correct size socket it will swell and fit tight

Yep convex side out. These are called welch plugs in case you want to go down a rabbit hole. When I've used this style in the past, I'd be sure to really clean the block surface. No old rust flakes or bits of permatex. Put a little film of permatex like you did before and it should seal no problem.

 

[Sky King]

Yep convex side out.

Interesting, I've never seen another motor done that way although I don't have a Toyota six to compare it to. I would think they'd be a bit harder to remove than the more conventional orientation.