Willys W3 head markings

Nov. 18, 1941 - MB100001 thru Mar. 6, 1942 - MB125809 NO EBAY or COMMERCIAL SALES.
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pbr332
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Willys W3 head markings

Post by pbr332 » Fri Dec 08, 2017 5:00 pm

I have a Willys head, smooth style top, with a 6-16 casting on the forward end, along with 63S6609 and W3 below that. Can anyone tell me what time frame this head is from? I tried uploading pictures but they're too large.
Frank Asturias, SFC U.S. Army (ret) MOS 88L40, MVPA 5519
'41 MB, wrecked
2 '42 MBs
1 "42 GPW
1 '43 MB
3 '43 GPWs

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Michael O.
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Re: Willys W3 head markings

Post by Michael O. » Fri Dec 15, 2017 9:11 pm

Are you sure about the casting number? MB heads should have a 639660 or 639660C casting number. If you email me a photo, I could post it for you.

The 6-16 is obviously June 16th...
Cry “Havoc!”, and let slip the dogs of war

WC4 8668603
MB 111414
GPW 2647
GPW 104111
MB 369488
MB 379204

MVPA #13861

pbr332
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Location: Fairfield, California

Re: Willys W3 head markings

Post by pbr332 » Fri Dec 15, 2017 11:16 pm

My mistake, it's 639660C.
Frank Asturias, SFC U.S. Army (ret) MOS 88L40, MVPA 5519
'41 MB, wrecked
2 '42 MBs
1 "42 GPW
1 '43 MB
3 '43 GPWs

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Michael O.
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Re: Willys W3 head markings

Post by Michael O. » Sat Dec 16, 2017 8:21 am

Excellent....the “C” tells us a lot actually. I think your head was cast on 6-16-42...post Slat Grill series but still “early”.

The raised “Willys” on MB heads didn’t show up until late 1942 or early in 1943, which is why I believe your head was cast in 1942.
Cry “Havoc!”, and let slip the dogs of war

WC4 8668603
MB 111414
GPW 2647
GPW 104111
MB 369488
MB 379204

MVPA #13861

Dave Ashby
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Re: Willys W3 head markings

Post by Dave Ashby » Wed Dec 20, 2017 5:43 am

I would agree with Micheal, the C was added in March 42 making your head after this but before the addition of the raised Willys as previously stated in above post in late 42 early 43.
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