buster hyman

can any one help me with some info on these first question why are they there i presume to restrict the water flow second question what size are they anddo they really need to be there as they holes in the head are there i can not find any thing in the workshop manual about them i hope someone can help i am not talking about the ones at each end of the block with the hole in them but the ones between the bores

D. Yaros

Since no one has responded, I am assuming they are like me in that they have no idea what a "Welch Plug" is?

Do you have a pic of one?

Oldsmaniac

Yeah ????

Run to Rund

I remember my 62 394 had a couple odd size cup plugs on each deck, 19/32" or 21/32" perhaps. I bought new ones from GM back in 1971 when I rebuilt the engine.

Ozzie

This might be a plug that was used in connection with the block casting process (sand removal) or perhaps to channel coolant in a certain way through the block and heads. If you could post some photos it might help.

buster hyman

THANKS everyone for there help verymuch appreciated yeah thats why they would be there i guess to remove the sand on the cast i think i have it sorted out sizing is alittle strange but i will recheck the size with yours runto rund yeah i am still trying to work out how to get pictures on here no such thing as computers when i went to school we only had girls to play with