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Main bearing spacers

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BBFTorino
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Main bearing spacers Empty Main bearing spacers

Post  EverySparePenny October 13th 2018, 11:12 pm

Are they used anymore? Where do I find them? Best installation technique?

Collecting for the new short block, have found several used billet cranks in useable stroke lengths but most have a 2.750 or smaller main.

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Post  BBFTorino October 13th 2018, 11:25 pm

Roushe used to carry them, dont know any more. But perhaps some of the builders / suppliers on here can source them.

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Post  Mark O'Neal October 14th 2018, 1:02 am

https://www.ebay.com/p/Engine-Crankshaft-Main-Bearing-Set-Sealed-Power-145M-SEMI/81183268

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Post  Paul Kane October 20th 2018, 11:41 am

Mark O'Neal wrote:https://www.ebay.com/p/Engine-Crankshaft-Main-Bearing-Set-Sealed-Power-145M-SEMI/81183268
Of course!  Thanks Mark!  This is exactly how we make full-groove main bearings for 460s these days, didn’t think about doing the same with bearings spacers! We grabbed a set. Cool
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Post  Bill Heard October 20th 2018, 1:02 pm

What's the difference between a main bearing spacer and a main bearing (insert) ?
I think I'm missing something here. But that's nothing new for me...…………..
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Post  Mark O'Neal October 23rd 2018, 1:28 am

A spacer is used to reduce the size of the crankshaft main journal...in this case from 3.000 to 2.750. The insert is the bearing.

So you install the spacer and the insert on top of that.

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Post  Bill Heard October 23rd 2018, 3:04 am

OK thanks...…….never heard of that before. So you would take a ford crank and turn the main bearing from 3 in. to 2.75 to have a smaller bearing surface......interesting.
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Post  jasonf October 23rd 2018, 6:58 pm

Bill Heard wrote:OK thanks...…….never heard of that before.  So you would take a ford crank and turn the main bearing from 3 in. to 2.75 to have a smaller bearing surface......interesting.

You would use a crank that already has 2.75 mains.
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Post  Bill Heard October 23rd 2018, 7:08 pm

OK I get it now, just a little slow.....thanks again
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