M38 head
Posted: Fri Dec 08, 2006 2:41 pm
800376 is the correct casting number for an M38 head; right?
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Posted: Fri Dec 08, 2006 11:07 pm
yes, and look for the water pump bypass on the front
Posted: Sat Dec 09, 2006 12:41 pm
800376 is the correct Willys factory installed head. A generic later 60's & up head (IE 807763) would be ok for a non-factory resto.
Posted: Sat Dec 09, 2006 4:36 pm
Ok thats what the number is of the head I am looking at. Havent found out yet if the bypass hole is there but is the head is the correct number the threaded hole for the bypass hose should be there.
Thanks
Thanks
M38 head.
Posted: Sun Dec 10, 2006 3:24 pm
I just recieved a photo of the 800376 head I am looking at and it does not have a hole in the front for the bypass hose. Is this possible? Though the 800376 casting was exclusive to the M38 engines.
Posted: Sun Dec 10, 2006 4:29 pm
No the 800376 casting was not exclusive to the M38 but that casting was probably available with different machining actions done on it. If Willys assigned the same part number to the head as the casting number for the M38 then that indicates the 800376 basic delivered head is as we've always seen it with the raised boss for the bypass hose drilled and tapped. If Willys had an application for the head that wasn't drilled and tapped then it would have the basic casting number on the head and a different part number in it's parts book.
M38 Head
Posted: Sun Dec 10, 2006 5:49 pm
The Head has the raised boss but there is no hole there.
Posted: Sun Dec 10, 2006 6:52 pm
There are several Post WWII heads with the raised boss both drilled and undrilled. There's no poblem with drilling the boss to insert the hose nipple.