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willysmjeeps.com :: View topic - Anyone tried this before
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Anyone tried this before

 
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explorexe
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Joined: Oct 10, 2023
Posts: 4

PostPosted: Mon Oct 23, 2023 5:42 am    Post subject: Anyone tried this before Reply with quote

I just helped a buddy install a CJ3B crankshaft, just because he was told that the CJ3B crankshaft would make his jeep run smoother and faster. He went all out and rectified a old 3B shaft and installed all-new matching bearings.

He has a M38 with the F-engine, soooooooo...


Opinions, anyone?
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wesk
Site Administrator
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Joined: Apr 04, 2005
Posts: 16365
Location: Wisconsin

PostPosted: Mon Oct 23, 2023 8:20 am    Post subject: Reply with quote

If he had an F engine then he already had a CJ3B style crank in it. The F134 enterred production around 1950 and was used on just about all the jeep lineup up thru 1971. There was only one variation in cranks used. The early was machined for the rope type rear seal and the later was machined for the formed lip type convention rear seal.
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Wes K
45 MB, 51 M38, 54 M37, 66 M101A1, 60 CJ5, 76 DJ5D, 47Bantam T3-C & 5? M100

Mjeeps photo album: http://www.willysmjeeps.com/v2/modules.php?set_albumName=Wes-Knettle&op=modload&name=gallery&file=index&include=view_album.php
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4x4M38
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Joined: May 30, 2014
Posts: 3459
Location: Texas Hill Country

PostPosted: Mon Oct 23, 2023 8:25 pm    Post subject: Reply with quote

I hope there was something wrong with the one he took out…
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Brian
1950 M38
MC11481
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RonD2
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Joined: Oct 02, 2014
Posts: 2004
Location: South Carolina, Dorchester County

PostPosted: Mon Oct 23, 2023 8:50 pm    Post subject: Reply with quote

With a F-head motor in a M38 does it really matter? Laughing
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Ron D.
1951 M38 Unknown Serial Number
1951 M100 Dunbar Kapple 01169903 dod 5-51

“The only good sports car that America ever made was the Jeep."
--- Enzo Ferrari

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