Oil Galley Plug??? '83FJ60

[NeverGiveUpYota]

Here’s a good shot from @CaptClose.... zoom in and it’s very obvious now.

 

[John Staton]

This is where your leak was. It is a press fit plug on the pre 85 2Fs, like your engine. In 85 they made it a threaded plug. See pictures below. The plug they installed is sitting quite a bit raised from the block surface.

View attachment 1570733 View attachment 1570736

That's it...thanks.

This is where your leak was. It is a press fit plug on the pre 85 2Fs, like your engine. In 85 they made it a threaded plug. See pictures below. The plug they installed is sitting quite a bit raised from the block surface.

View attachment 1570733 View attachment 1570736

That's it!! so yeah, the way it looks now still worries me so I will inquire to how that is held in from the shop that does my FJ work. What is that plug for? It sure made one hell of a mess after it blew and I am sure glad I caught it in time. Want to make sure that never happens again and now I am thinking about that oil galley plug too. Mine is almost invisible because of the paint, but thinking that I want to address that before it blows.

 

[GLTHFJ60]

It's called a welch plug. It's a convex steel disk that's put in the open hole and punched into place by caving in the convex dome. This jambs it in the hole and is supposed to be a permanent seal, although that's obviously not the case in all circumstances. Scroll down in this article for a description:

Core plug - Wikipedia

Did you find the old welch plug in your driveway?

 

[morganism]

Now i am wondering what caused this, it doesn't seem like it would happen without cause. EGR plugged, or leaking rings seem the most likely, but exhaust into the block otherwise seems like a tough puzzle. Ideas folks?

 

[John Staton]

Now i am wondering what caused this, it doesn't seem like it would happen without cause. EGR plugged, or leaking rings seem the most likely, but exhaust into the block otherwise seems like a tough puzzle. Ideas folks?

I took my rig to a guy found via this forum who has a shop and a passion for LCs. Asked him to go through it....I want it to run smoother, may just need a good tune up. Engine was rebuilt about 18 months ago. I mentioned the blown plug but may bring your comment to his attention.

 

[GLTHFJ60]

Now i am wondering what caused this, it doesn't seem like it would happen without cause. EGR plugged, or leaking rings seem the most likely, but exhaust into the block otherwise seems like a tough puzzle. Ideas folks?

Yes:

Did you find the old welch plug in your driveway?

If you did, we could learn a lot from looking at the old plug.

 

[John Staton]

so I guy in the shop took a pic of the plug. He said it looked like they sloppily threw this on covered in a bunch of sealant.

 

[Trapper50cal]

I guarantee your truck is glad it has someone looking into its issues more comprehensively.

 

[GLTHFJ60]

so I guy in the shop took a pic of the plug. He said it looked like they sloppily threw this on covered in a bunch of sealant. View attachment 1574037

I agree with the shop. Improperly installed plug (that never correctly sealed). Over time it worked itself loose because it was improperly installed by whomever put it in. That's likely all we'll learn about it.

 

[NeverGiveUpYota]

Wow, that’s seriously poor on that shops part. I wonder what made them think stuffing it in w/ sealant would be enough to hold it in w/ the pressures that build up inside the block?
Right?

 

[NeverGiveUpYota]

I have a welch plug (glad @GLTHFJ60 remembered that term) where my egr heat riser would be hooked up typically as on an earlier model or a 62.... am I correct in that? I’ve got a really good shot of it since I had everything off including the power steering pump and bracket awhile back. That one is large, easily 2” or more and definetly a different metal (steel) as opposed to the block. It’s quite firmly set and has a bit of a lip to the outer rim as well as being sunk in at least a 1/2”.... would be a smaller welch plug could blow out even easier if not installed correctly because of size. Smaller surface area can’t hold as much pressure back... call me a novice but thsts how I see it. Be sure to take more photos and send it to that other shop. They can only learn from their mistakes if they see where they went wrong. And hopefully they’ll apologize for their shoddy job.

 

[GLTHFJ60]

Wow, that’s seriously poor on that shops part. I wonder what made them think stuffing it in w/ sealant would be enough to hold it in w/ the pressures that build up inside the block?
Right?

Specifically oil pressure, yes. Smaller plugs have less force to hold back given the same pressure, due to the smaller surface area.

 

[lel]

That plug welched on the oil bet.
Thank god I have an 87.
My galley plug still needs attention as might yours.
God help my 40


Good luck , larry