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Rod bearings.
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joegrgraham View Drop Down
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Joined: 12 Nov 2009
Location: Wiltshire, UK
Points: 92 		Post Options Post Options   Thanks (0) Thanks(0)   Quote joegrgraham Quote  Post ReplyReply Direct Link To This Post Topic: Rod bearings.
    Posted: 01 Apr 2010 at 2:48pm
Why is it that a brand new set of +20 thou rod bearings are around 6 - 7 thou THINNER than an old set of +10 thou ones I've just pulled out of the scrap bin???????????
If it seems like a good idea, do it. It's easier to apologise than to get permission.
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mlpankey View Drop Down
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Joined: 13 Sep 2009
Location: Vols country
Points: 4580 		Post Options Post Options   Thanks (0) Thanks(0)   Quote mlpankey Quote  Post ReplyReply Direct Link To This Post Posted: 01 Apr 2010 at 3:11pm
have you wiped the new bearings? 
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Dick L View Drop Down
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Joined: 12 Sep 2009
Location: Edon Ohio
Points: 5087 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Dick L Quote  Post ReplyReply Direct Link To This Post Posted: 01 Apr 2010 at 3:14pm
One or the other was mismarked. One of those details I gripe about all the time. Measure every part before installing.
(Brand new parts should not need to be measured) (Ya, Right) as you just found out.  
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joegrgraham View Drop Down
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Joined: 12 Nov 2009
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Points: 92 		Post Options Post Options   Thanks (0) Thanks(0)   Quote joegrgraham Quote  Post ReplyReply Direct Link To This Post Posted: 01 Apr 2010 at 4:04pm
Dick L, what should be the correct thickness for a new rod bearing, and the mains as well, if I've got the correct figures, I can work out the rest. Many Thanks.
If it seems like a good idea, do it. It's easier to apologise than to get permission.
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mlpankey View Drop Down
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Joined: 13 Sep 2009
Location: Vols country
Points: 4580 		Post Options Post Options   Thanks (0) Thanks(0)   Quote mlpankey Quote  Post ReplyReply Direct Link To This Post Posted: 01 Apr 2010 at 4:16pm
I am not dick but why would you be concerned with overall thicknes of bearings . The rod with the bearing in it and  the bottom cap torqued should be .002 larger than the rod journal . If thats right you put it on the rod journal and with a feeler gauge you make sure you have some side clearance between the rod and the crank jornal throw .  for the oem guys the book says .004-.007 side clearance. you know you shim between the rod and rod cap unless you had them machined so that you dont use shims right.

Edited by mlpankey - 01 Apr 2010 at 4:18pm
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Dick L View Drop Down
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Joined: 12 Sep 2009
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Points: 5087 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Dick L Quote  Post ReplyReply Direct Link To This Post Posted: 01 Apr 2010 at 4:35pm
Take a look at the pictures. this one of the ways I check bearings.
 
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