440, 441, 442 engine questions

Nov. 18, 1941 - MB100001 thru Mar. 6, 1942 - MB125809 NO EBAY or COMMERCIAL SALES.
Andy Cole
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Re: 440, 441, 442 engine questions

Post by Andy Cole » Mon Jul 20, 2020 12:04 pm

I am a little late the game, but my 1943 frame MB has engine 442-80887 in it.
So does that make my engine a 1941?
1943 Willys MB285433 D.O.D. 12-3-1943
1951 M100 trailer D.O.D. 3/51
1951 M37 Truck D.O.D. 5-28-1951
M3 37MM ATG
M3A4 Hand Cart
Wife D.O.Delivery 7-21-1979
Boy D.O.Delivery. 2-15-2007
Girl D.O.Delivery. 4-9-2009
Girl D.O.Delivery. 10-23-2012


sjalbert
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Re: 440, 441, 442 engine questions

Post by sjalbert » Mon Jul 20, 2020 12:24 pm

442 would be a 1942 Civilian block.
Seth
******
1944 MB 349858, 20620361
1942 MBT 10968 viewtopic.php?f=18&t=149552
1942 MBT 15799, USA 0217497 viewtopic.php?f=18&t=225199
MVPA # 8587
Com / Inst. SMEL
CFII - ASEL
KI5LYB

Collecting Willys Engine Info. Please send me Engine #, Casting Date & Machining Date if known

Andy Cole
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Re: 440, 441, 442 engine questions

Post by Andy Cole » Mon Jul 20, 2020 2:02 pm

Will the crankshaft from a CJ3 engine fit this block?
1943 Willys MB285433 D.O.D. 12-3-1943
1951 M100 trailer D.O.D. 3/51
1951 M37 Truck D.O.D. 5-28-1951
M3 37MM ATG
M3A4 Hand Cart
Wife D.O.Delivery 7-21-1979
Boy D.O.Delivery. 2-15-2007
Girl D.O.Delivery. 4-9-2009
Girl D.O.Delivery. 10-23-2012

Adam
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Re: 440, 441, 442 engine questions

Post by Adam » Mon Jul 20, 2020 3:39 pm

Define fit. Yea, a square peg in a rectangular hole.Sure its a 3a crank? part numbers are good, stuff gets changed around, It has bolted and welded on weights, 442 did not. its most likely gear drive vs engine originally chain drive. It can be retrofitted. Balance issues maybe, some dont care to keep the the "3a" rods. Watch for clearance issues on galley plugs. this conversion is done quite a bit, if you use gear drive parts you will need to drill block for gear oiler,front mount will need modification. Then cam is incorrect too. Or just 3a crank with 3a rods, change to chain drive. You can balance rods and crank if using a machine shop. Watch rear main seal area.

There are quite a few posts on this being done on here, and i have seen numerous early engines running with post war cranks, mixed with pre and post war rods. Its a easy way to fix an engine
without spending lots of time sourcing the original crank. The original crank is the same as the standard mb crank. the ORD 9, dated 49, download, available on jeep draw, shows lots of different cranks available, also shows rods superseeded. mentions the late crank you are talking about. Now whats the difference beteween a 1946 crank and a 1952 crank? maybe other than flywheel dowl bolts.

adam

Andy Cole
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Re: 440, 441, 442 engine questions

Post by Andy Cole » Mon Jul 20, 2020 5:11 pm

The crank in this 442 engine has bolted and welded on weights. One of them is loose.
It has also spun one rod bearing a galled rage rod journal of the crankshaft.
I have a spare CJ3 engine that was used as an agricultural irrigation pump before I got it.
I thought I’d see if the cranks would swap before pulling this engine apart for inspection.
1943 Willys MB285433 D.O.D. 12-3-1943
1951 M100 trailer D.O.D. 3/51
1951 M37 Truck D.O.D. 5-28-1951
M3 37MM ATG
M3A4 Hand Cart
Wife D.O.Delivery 7-21-1979
Boy D.O.Delivery. 2-15-2007
Girl D.O.Delivery. 4-9-2009
Girl D.O.Delivery. 10-23-2012

Adam
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Re: 440, 441, 442 engine questions

Post by Adam » Mon Jul 20, 2020 6:13 pm

Looks like somebody already did it once, The cranks with bolted weights are going to be the same. You can compare part numbers, you can also use the rods in the good engine.

is the 442 gear drive or chain drive, which rod bearing went.

adam

Andy Cole
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Re: 440, 441, 442 engine questions

Post by Andy Cole » Tue Jul 21, 2020 12:46 am

The 442 engine is chain drive.
It was the #4 rod bearing
1943 Willys MB285433 D.O.D. 12-3-1943
1951 M100 trailer D.O.D. 3/51
1951 M37 Truck D.O.D. 5-28-1951
M3 37MM ATG
M3A4 Hand Cart
Wife D.O.Delivery 7-21-1979
Boy D.O.Delivery. 2-15-2007
Girl D.O.Delivery. 4-9-2009
Girl D.O.Delivery. 10-23-2012

92889
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Re: 440, 441, 442 engine questions

Post by 92889 » Wed May 26, 2021 2:27 pm

I’ve recently acquired 440-43611
I’m tearing it down now for rebuild.
F832F05A-DE66-47BC-AE11-EEF2592CC32D.jpeg

Johnsamschulz
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Re: 440, 441, 442 engine questions

Post by Johnsamschulz » Wed Mar 13, 2024 12:15 pm

I have a Willys engine head without any markings on it . Could it be a 440 engine head. The thermostat housing hast 3 bolts?

Adam
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Re: 440, 441, 442 engine questions

Post by Adam » Wed Mar 13, 2024 12:34 pm

highly unlikely,, heads were made aftermarket also, 440- should have a 2 bolt

any pics of top and bottom

Adam


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