Water restriction washers

Having just discovered that the head is cracked on my 26 Hudson Coach, I pulled the head and found the two water restrition washers were missing from on top of the block. I know it has been discussed before, but could someone please give me the inside diameter for the hole in the washers?

The head cracked at the 3 o'clock position on the front hole where the water manifold bolts onto the head. It had been repaired before I bought the car as I found the area had been "pinned" (sometimed called metal stitching). What I hadn't noticed was that there is a crack at the 9 o'clock position that went all the way down to the surface of the head. It never leaked and just looked like a water stain caused by the other crack. This makes the second head I have where the head cracked at the 3 o'clock position. Any of you have a head crack in the same place?

Evo
This discussion has been closed.