Good Morning,
I'm reassembling my replacement block which is a gear drive CJ2 motor.
When I picked up my crank, they told me they had to take .020 off the thrust surface to clean it up and to be sure to check the endplay. Not knowing what I know now, I took the crank home happy to have it back. Everything has gone together great with correct clearances on the mains and rods but find I can do nothing about the .024 endplay I now have.
From reading all the posts, I see no options for removeing endplay if there aren't any shims. Seems like the machine shop has to take .020 off the front surface the thrust washer rests on?
Thanks
Too much endplay
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- G-Staff Sergeant
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Too much endplay
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- dpcd67
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Re: Too much endplay
End play is adjusted by adding shims under the crank pulley; study your M38 engine manual. It should be 4 to 6 thousandths.
U. S. Army 28 years.
Armor Branch
Armor Branch
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Re: Too much endplay
So do I have it wrong? If there is .024 without any shims, won't adding shims increase the endplay?
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Re: Too much endplay
You have it right, Tom.
When the thrust surface was machined, the front of the crankshaft, where the shims go, should have been machined an equal amount as well.
You have .024 with no shims and no options to close up the end play any more but remove the crank and take it back to the shop and have them finish the job.
When the thrust surface was machined, the front of the crankshaft, where the shims go, should have been machined an equal amount as well.
You have .024 with no shims and no options to close up the end play any more but remove the crank and take it back to the shop and have them finish the job.
Mike Wolford
CJ-2A
VEP GPW
Comm./Inst. SEL
AOPA ( 50 yrs)
EAA ( 49 yrs)
4th Inf. Div. - 5th Inf. Div. - 2nd Armor Div. - CIB
CJ-2A
VEP GPW
Comm./Inst. SEL
AOPA ( 50 yrs)
EAA ( 49 yrs)
4th Inf. Div. - 5th Inf. Div. - 2nd Armor Div. - CIB
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- G-Staff Sergeant
- Posts: 54
- Joined: Thu Nov 06, 2008 10:09 am
- Location: Illinois USA
Re: Too much endplay
Thanks for the reply Wolfman
Seems like there are two options for removing endplay with no shims
Machine the crankshaft shoulder
Machine the thrust washer
I'll be taking the crank back today
Tom
Seems like there are two options for removing endplay with no shims
Machine the crankshaft shoulder
Machine the thrust washer
I'll be taking the crank back today
Tom
42 Script GPW
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