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Freeze plugs?

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burgundyben

Jedi Hopeful
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I think you guys call them freeze plugs? Over here we call them core plugs.

On my late 18V should I have the flat type or the cupped type?

I got sent the cupped type, they seem to deep for the hole in the block, I had one of the flat type hanging around so fitted that, it seems much more secure, reckon I might get 3 more of the flat type and fit those.
 
Or "welch" plugs. I'd suggest you find the "flat" sytle, should be common enough in local auto parts stores. They'll have all different diameters. Use some "aircraft" grade engine gasket sealant around the edges and whack the center (convex side out) with a large diameter drift 'n hammer. /bcforum/images/%%GRAEMLIN_URL%%/thumbsup.gif
 
On all MGB 1800s, the factory style is a cupped freeze plug, the cup faces outward, installed, sealed ( I use JB weld expoxy to seal mine) and then must be dimpled inward at the cup, use the ball part of a ball pen hammer for this. An option is to use a Dorman style expandable brass freeze plugs, but the factory ones do a good job if installed correctly, which often enough they are not.
 
I dont think I was very clear...

Type one - a circular piece of steel in a shallow dish shape. Depth of dish about 1/8 inch.

Type two - a flat circular disc with a approx 1/4 deep wall around the edge. Like a very small cake tin!

I got a set of the type 1 today.
 
Yup, the first ones ("dish") are the proper ones. Hap said use a ball pean hammer, I prefer to use a 3/4" diameter brass drift between the hammer and the plug. And I seal 'em with Permatex "aviation form-a-gasket". It'll seat/seal either method.
 
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