Connecting Rod Bearing Size

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Old Sep 15, 2018 | 03:54 PM
  #1  
AMCOLDS's Avatar
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Connecting Rod Bearing Size

I have an Olds 1976 455 7.5L engine that im building, i need to get new conneting rod bearings and can't find what the standard size is, the size of my journals are 2.4920-2.4930 in, is that standard or undersize and if so how much under?
Old Sep 15, 2018 | 05:11 PM
  #2  
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How are you measuring it ?? If your measurement is correct it is a VERY worn out standard.
Standard sizes are Mains 2.9990-3.0000 Rods 2.4999-2.5000
2.490 would be .010 undersize

You really need to use a micrometer to measure, not a pair of calipers.

Last edited by BillK; Sep 15, 2018 at 05:17 PM.
Old Sep 15, 2018 | 05:16 PM
  #3  
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Originally Posted by BillK
Standard sizes are Rods 2.9990-2.3000 Mains 2.4999-2.5000
I think you have the rods and mains swapped, Bill.
Old Sep 15, 2018 | 05:17 PM
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Originally Posted by joe_padavano
I think you have the rods and mains swapped, Bill.
Doh.....been a long day. I fixed it
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