Quote:
Originally Posted by rotorwrench
I was always under the assumption that the core plugs were only used in the early 24 stud engine blocks. 1938, 1939, and maybe 1940 to include the 81A, 99A, and 99T-6010 cylinder assy. I'm not sure about the 19A blocks in 41 whether they were the first with no core sand cleanout plugs. The 21A & 29A types starting in 42 and the 29A types continuing through wartime and had no core sand clean out holes in the pan rails.
I know the Canadian 95 HP blocks had the raised 99 on the right side of the block where the USA blocks had the 99 stamped in the top right intake deck on some. This was only on the 99 type 239 cid blocks though.
|
Quote:
Originally Posted by rotorwrench
USA replacements were the 41A-6010 for the old 221 cid and many of them had the 59 on the bell. It would be interesting to know if the Windsor, Ontario blocks continued the core sand clean out holes in the pan rail longer than Ford Rouge plant did.
Kerby
|
Kerby, What you advise is pretty much what I have found through my research. The core plugs were discontinued (US at least) around August of 1940. This coincided with the introduction of the "raised intake planes".