1946-1949 46 -47 heads different ?

[Flying Finn]

Hello Gentleman,
My 47 62 series convertible has a early 46 motor .. are there any differences in the motor from a 46 to a 47 ? heads ?
thanks, Jaan

[Roger Zimmermann]

Same part number from 1941 thru 1948.

[Flying Finn]

thanks for the fast reply ,, someone told me there is a difference in the casting reinforcements
on the surface .

[Roger Zimmermann]

If there is a modification with reinforcement, the part number would be different. However, it's possible that the production heads are indeed different. However, the heads sold as spare parts are all the same 41-48, maybe with the latest "improvements".
Maybe you will get a more precise answer from the people who are dealing with those years.

[Warren Rauch #4286]

    There must have been a change during WW2 in the heads. The 1946 parts book listing calls for

     1941-42 1441399 right
             1097397 left
     1946    1451331 right
             1097508 left.
    Newer books just list the 1946 numbers for all 1941-48
 Slight changes in the casting may or may not be enough to change the number. You will need to get casting numbers and dates. If you need to know.

Service Man  1947 page 22
  Some early 1947 Engines have incorrect cast right cylinder heads. It would result in over heating,and should have  long ago been corrected.The problem was in the water passages and how it they mated up with the block.

Warren