bearings
01-01-2012, 04:47 PM
#1
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bearings
Need some help again confused on rod bearings. Have 440 and replacing the rod bearings. Checked the rod journal with dial caliper and got 2.375 which I think is standard journal. So I bought a set of standard bearings when I get to taking the old ones off the rods there different some bearings say clevette 77 .001 us and some say DA 49 with a 10-72 on them. When I put the the std bearings on the crank the ends of bearings dont meet theres a gap. The old bearings both ends will touch when I put them on the crank. So what do I have going on. I thought this motor had never been touched do to it having a std bore and metal head gaskets. Any help appreciated
01-01-2012, 06:29 PM
#3
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.010 is ten thousands undersized....Clevite sells bearings for only polished journals at .001.
Sorry but I would never do that..I would turn the crank ten thousands and have the whole assy. balanced.
Sorry but I would never do that..I would turn the crank ten thousands and have the whole assy. balanced.
Last edited by bremereric; 01-02-2012 at 09:24 AM.
01-01-2012, 07:23 PM
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So with that being said does that mean that if I show the crank at 2.38 std that the rods could have been machined down at one time and the crank not touched. I will take the crank to a machine shop thanks for your help
Last edited by willysman69; 01-01-2012 at 07:27 PM.
01-01-2012, 07:24 PM
#5
First, .001 is ONE THOUSANDTH of an inch. "ten under" would be .01 or .010 "undersized"
Second, don't be depending on a dial caliper to measure cranks. They might be good for a rough check, but not final work. The average back yard guy should become familiar with a product called "Plastigauge"
I would think if you put .001 shells on a standard crank, I would think you'd have trouble seeing that the shells "don't meet." Part of this may be that the shells are "spread" a little bit, IE they won't be in proper shape until torqued into a rod
But if the shells are STAMPED right on the shell .001, they certainly are not standard.
Second, don't be depending on a dial caliper to measure cranks. They might be good for a rough check, but not final work. The average back yard guy should become familiar with a product called "Plastigauge"
I would think if you put .001 shells on a standard crank, I would think you'd have trouble seeing that the shells "don't meet." Part of this may be that the shells are "spread" a little bit, IE they won't be in proper shape until torqued into a rod
But if the shells are STAMPED right on the shell .001, they certainly are not standard.
01-01-2012, 07:33 PM
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First, .001 is ONE THOUSANDTH of an inch. "ten under" would be .01 or .010 "undersized"
Second, don't be depending on a dial caliper to measure cranks. They might be good for a rough check, but not final work. The average back yard guy should become familiar with a product called "Plastigauge"
I would think if you put .001 shells on a standard crank, I would think you'd have trouble seeing that the shells "don't meet." Part of this may be that the shells are "spread" a little bit, IE they won't be in proper shape until torqued into a rod
But if the shells are STAMPED right on the shell .001, they certainly are not standard.
Second, don't be depending on a dial caliper to measure cranks. They might be good for a rough check, but not final work. The average back yard guy should become familiar with a product called "Plastigauge"
I would think if you put .001 shells on a standard crank, I would think you'd have trouble seeing that the shells "don't meet." Part of this may be that the shells are "spread" a little bit, IE they won't be in proper shape until torqued into a rod
But if the shells are STAMPED right on the shell .001, they certainly are not standard.
01-02-2012, 09:24 AM
#7
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