MEP-803a expansion/freeze plug leak

[Suprman]

Have an 803a. One expansion plug is leaking. Was hoping someone had at least the hole measurement so I can get a replacement plug for it. Anyone replace one yet? TM part number is for a complete kit. Was hoping to get the one single piece.
Thanks
Will

 

[Dock Rocker]

Have an 803a. One expansion plug is leaking. Was hoping someone had at least the hole measurement so I can get a replacement plug for it. Anyone replace one yet? TM part number is for a complete kit. Was hoping to get the one single piece.
Thanks
Will
View attachment 732700

You would think if we could put a man on the moon we could come up with a better design than a stupid freeze plug.

I can’t give you much help but I do feel your pain.


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[Bmxenbrett]

You might have to take it out to measure it. It would be a great time to add a block heater if your in the climate.

Make sure you get the correct sealant to install the new ones and flush the system when your done. The goo coming out of that engine dosnt look good.

 

[Farmitall]

Remove the plug without distorting it too badly and measure it then go to an auto parts store and get a replacement. Dorman makes all sizes plugs.
If you cant find a replacement metal one, use an expanding rubber one that has the nut on it that you tighten. A very thin skin of silicone sealant on the edge to insure the seal.

When replacing a metal one, be sure the hole is clean and dry. I use a piece of fine emery cloth to clean the block surface of the hole and a very thin (very thin) coating of Indian Head gasket shellac as a sealer. Use a socket that fits the ID of the plug and an extension to tap the new plug into place

I've replaced dozens of these on various engines this way over the years and never had one leak.

 

[Ray70]

once you get the size measured, might want to buy some spares, unless you plan to change them all now.
That one looks rotted so I'd assume there are others that aren't far behind... and you know they won't let go until the worst possible time!