Main bearing spacers
Main bearing spacers
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.
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.
EverySparePenny- Posts : 80
Join date : 2017-12-19
Location : Iowa
Re: Main bearing spacers
Roushe used to carry them, dont know any more. But perhaps some of the builders / suppliers on here can source them.
BBFTorino- Posts : 709
Join date : 2015-12-31
Re: Main bearing spacers
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.

Paul Kane- Posts : 842
Join date : 2009-09-15
Location : San Francisco Bay Area
Re: Main bearing spacers
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...…………..
I think I'm missing something here. But that's nothing new for me...…………..
Bill Heard- Posts : 109
Join date : 2011-04-10
Age : 74
Location : Portland Oregon
Re: Main bearing spacers
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.
So you install the spacer and the insert on top of that.
Mark O'Neal- Posts : 199
Join date : 2009-08-12
Re: Main bearing spacers
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.
Bill Heard- Posts : 109
Join date : 2011-04-10
Age : 74
Location : Portland Oregon
Re: Main bearing spacers
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.
jasonf- BBF CONTRIBUTOR
- Posts : 2865
Join date : 2009-07-14
Age : 49
Location : Lafayette, LA
Re: Main bearing spacers
OK I get it now, just a little slow.....thanks again
Bill Heard- Posts : 109
Join date : 2011-04-10
Age : 74
Location : Portland Oregon
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