pilot bearing to big

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pilot bearing to big

Post  Bart Knox on March 28th 2015, 2:48 pm

Got pilot bearing for 460 and it's to big? Has anyone run into this problem? Can I get a brass bushing made if so what size
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Re: pilot bearing to big

Post  FalconEh on March 28th 2015, 6:51 pm

Bart Knox wrote:Got pilot bearing for 460 and it's to big? Has anyone run into this problem? Can I get a brass bushing made if so what size

Go back to your original post...get the right one!
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Re: pilot bearing to big

Post  7LBRONCO on March 28th 2015, 7:53 pm

Define "too big", please. I'm not sure ALL 460 cranks were even machined for a pilot bushing.

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Re: pilot bearing to big

Post  Bart Knox on March 28th 2015, 9:42 pm

1/32 of a inch I'm going to get a tool to measure exactly but ya just a bit to big
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Re: pilot bearing to big

Post  Bart Knox on March 28th 2015, 10:06 pm

I was thinking a bushing that went all the way back or like a adapter to use the smaller pilot
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Re: pilot bearing to big

Post  Bart Knox on March 29th 2015, 11:20 am

Od 1.823 and bearing is 1.850
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Re: pilot bearing to big

Post  Bart Knox on March 29th 2015, 7:51 pm

It seems 1973   4U     429 outer pilot hole is 1.825 so I cleaned it up and measured it again and that's the measurement I'm getting? maybe I don't have a 460
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Re: pilot bearing to big

Post  466cj on March 29th 2015, 9:22 pm

There were two different pilot sizes used on the car and light truck stuff. The old FE size and the SBF size. The late model external balanced 460's like used in the EFI applications used a pilot bearing adapter like what you have. The older cranks with the SBF size pilot are a bit smaller on the outer step like what you are have. The SBF pilots on the inner step which is 1.375" and guess Ford did not care about the outer step.  The early cranks with the FE pilot are on the outer step and should be 1.848". The later external balance 3Y cranks actually use the SBF pilot, but the outer part is machined a bit bigger to take that pilot bearing adapter

You can either get the right adapter for your crank or have the adapter you have machined down to fit. That is what I did and it worked fine. As far as what crank 4U is 429, 2Y (XXX) is internal balanced 460, 3Y is the '79 and up external balance 460.  On the early year stuff you always need to check what pilot the crank has.

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Re: pilot bearing to big

Post  Bart Knox on March 30th 2015, 11:12 am

I got the barring cut down and went a little to small   How much bigger should should it be? I measured 1.825 and made that one 1.827 fit a little loose
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Re: pilot bearing to big

Post  Bart Knox on March 30th 2015, 4:24 pm

I measured again with a friend who has measured a bearing before and he got 1.827  5  I must have zerod it or something so I ordered a new bearing again be here in four days so if the crank is 1.827  5 what should I make the bearing to
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