 main bearings, preferred manufacturer |
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| 930cabman |
 Nov 27 2021, 09:55 AM
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Advanced Member  Group: Members Posts: 3,640 Joined: 12-November 20 From: Buffalo Member No.: 24,877 Region Association: North East States 
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I recently purchased a standard size main bearing set from a large vendor, checking the clearances I am finding this new set will provide a clearance at the high limit per factory specs. My crank is spot on, but the main bearing ID appears too large. I can easily fit a .004 feeler between the crank and new bearing ID. Just for fun, I tried an old (used)main bearing and found it to have a smaller ID (by about .0015) than a new one. Am I missing something?
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| Mark Henry |
Nov 28 2021, 01:06 PM
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
Yes the bearings is a torqued spec. Plastigauge is about the only way to do it. I also measure the bearing shell thickness in about 5 spots to make sure the surface is even. Porsche also does this on GT3 911 bearings, you can see the mark from measuring tool.
You could get the bearings coated, but it only adds about .0002 to .0004" to the babbit surface. |
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Posts in this topic
930cabman main bearings Nov 27 2021, 09:55 AM
914Sixer You have to remember that your old bearing shell h... Nov 27 2021, 01:37 PM
930cabman
You have to remember that your old bearing shell ... Nov 27 2021, 04:31 PM iankarr There's been lots of talk about quality beinig... Nov 27 2021, 04:06 PM AndradeT
There's been lots of talk about quality beini... Nov 28 2021, 09:35 PM iankarr
There's been lots of talk about quality bein... Nov 30 2021, 11:01 PM 914Sixer Yes the old bearing remains crushed. Yes you can ... Nov 27 2021, 07:14 PM 930cabman Crushed!!
I may have known this in the pa... Nov 30 2021, 11:26 AM 930cabman Yes, as expected: I did assemble the crank/new mai... Nov 30 2021, 06:54 PM 930cabman Yes, as expected: I did assemble the crank/new mai... Nov 30 2021, 06:55 PM |
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