 Main bearing clearances? |
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| stugray |
 Jul 28 2012, 08:56 PM
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Advanced Member  Group: Members Posts: 3,825 Joined: 17-September 09 From: Longmont, CO Member No.: 10,819 Region Association: None  |
I am getting ready to put my short block together and I have what appears to be a fairly new crank.
Main bearing journals: 2.361. The bearings appear to be new unused STD-STD. When I put on the main bearing that goes directly beneath the cam gear dry and wiggle it I get ~4 thousandths "wiggle" when measured with a dial indicator stuck to the flywheel. Does that sound correct? Would that be considered two thousandths bearing clearance (2 on each side = 4)? Stu |
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| stugray |
Jul 28 2012, 09:58 PM
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Advanced Member Group: Members Posts: 3,825 Joined: 17-September 09 From: Longmont, CO Member No.: 10,819 Region Association: None |
Yes I have heard of plastigauge, but you cannot use it in this application because the two bearings I am trying to measure are the full circumference bearings. There is no way to get it in there and then clamp.
That would work for the rod bearings or the center bearing. Thanks though. Stu |
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| mrbubblehead |
Jul 28 2012, 09:59 PM
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Twodollardoug Group: Members Posts: 1,155 Joined: 17-December 10 From: calimesa ca. Member No.: 12,492 Region Association: Southern California |
QUOTE(stugray @ Jul 28 2012, 08:58 PM)  Yes I have heard of plastigauge, but you cannot use it in this application because the two bearings I am trying to measure are the full circumference bearings. There is no way to get it in there and then clamp. That would work for the rod bearings or the center bearing. Thanks though. Stu gotcha |
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Posts in this topic
stugray Main bearing clearances? Jul 28 2012, 08:56 PM
mrbubblehead
I am getting ready to put my short block together... Jul 28 2012, 09:14 PM
stugray Bump.
Bolting halves together today.
Anyone else ... Jul 29 2012, 10:08 AM McMark I've never measured the rock but it's defi... Jul 29 2012, 10:11 AM Racer Chris
...
When I put on the main bearing that goes dire... Jul 29 2012, 10:32 AM nathansnathan The crank journal should be between 2.3610 and 2.3... Jul 29 2012, 10:45 AM stugray The crank is bolted to the flywheel sitting on the... Jul 29 2012, 11:03 AM nathansnathan I've always taken my crankcase, crank, and fly... Jul 29 2012, 12:18 PM stugray
No I am measuring how much the bearing moves sid... Jul 29 2012, 01:26 PM sixnotfour :beer2: Jul 29 2012, 02:50 PM
ldsgeek The only way to check the clearance on those beari... Jul 29 2012, 07:07 PM |
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