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Old 03-03-2021, 04:33 PM   #1
tomleemotors
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Default how to measure crankshaft end play

we have 1950 8BA in a 47 ford car , is there a way to get a close end play measurement 0f the crankshaft ? One shop told me .006 another said .014
my head hurts , thx tom
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Old 03-03-2021, 04:38 PM   #2
cas3
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Default Re: how to measure crankshaft end play

on old loose motors you can usually just push the flywheel in and out by hand, or with a pry bar. set up a dial indicator and see the readings when you move it. if no indicator i imagine you could set up something to measure off and do it with feeler gauges
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Old 03-03-2021, 04:42 PM   #3
VeryTangled
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Default Re: how to measure crankshaft end play

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Originally Posted by tomleemotors View Post
we have 1950 8BA in a 47 ford car , is there a way to get a close end play measurement 0f the crankshaft ? One shop told me .006 another said .014
my head hurts , thx tom
Is the question how? Or how much?

cas3 has much of it. Generally the how, uses a dial indicator placed at one end of the crank while shoving said crank back and forth in a sensible manner frequently with prying tools.

The how much answer I don't have for your application. Let's see who chimes in.
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Last edited by VeryTangled; 03-03-2021 at 04:49 PM.
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Old 03-03-2021, 06:42 PM   #4
19Fordy
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Default Re: how to measure crankshaft end play

According to the Motors Repair Manual the crankshaft endplay for the 1952-53 V-8 239 cu. in engine is .004 to .008 in. I would think 1950 engine would be the same.

Last edited by 19Fordy; 03-04-2021 at 09:07 PM.
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Old 03-03-2021, 07:05 PM   #5
Brendan
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Default Re: how to measure crankshaft end play

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Originally Posted by cas3 View Post
on old loose motors you can usually just push the flywheel in and out by hand, or with a pry bar. set up a dial indicator and see the readings when you move it. if no indicator i imagine you could set up something to measure off and do it with feeler gauges
with my model a i can measure it with a tape measure...lol
I had a chevy 350 tat the end play must hafe been 1/4 inch
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Old 03-04-2021, 08:18 AM   #6
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Default Re: how to measure crankshaft end play

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After you measure the end play what happens if it is excessive? I was told it is more critical on a standard transmission because you push on the crank when you step on the clutch so the crank is constantly moving back and forth where it will just find a happy place with an automatic.
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Old 03-04-2021, 09:20 AM   #7
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Default Re: how to measure crankshaft end play

I try to stay within the spec . . . otherwise either the thrust surfaces of the rear main bearings are worn, or the crank thrust surfaces . . . or both.
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