Flathead V8 Welch Plugs

[Alex Blair (RIP)]

Originally Posted by Keith Webb

Recently I took the sump off a Mercury V8. Hidden by the sump gasket are four small (about 11/16" or 18mm) welsh plugs. The two towards the front of the engine weren't fitted so this seems not to be a serious problem to the previous rebuilder. The holes were full of gunk and quite deep and they seem to go into the water jacket.

Has anyone had any experience of this?

A source of supply for these dished plugs in Melbourne? Once you could get this sort of thing at Repco but no longer.

Keith ..
I don't know what welsh plugs are but they look like frost plug holes to me///.If the block freezes ..they pop out instead of you block cracking..very common in Canada..Can pick them up at Canadian tire the next time you are by..
Merry Christmas..
Alex