 starting the engine build, rods won't spin on carnk |
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| toon1 |
 Sep 16 2007, 08:45 PM
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#1
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Senior Member  Group: Members Posts: 1,849 Joined: 29-October 05 From: tracy,ca Member No.: 5,022  |
I tried to install the con. rods on the crank today and they will not spin.
rods are std. size crank polished and std. when the bearing is installed in the rod, I noticed the edge sticks above the matin surface on the rod and the cap a little. Bearings, I think are std. Thank's, Keith Attached image(s)  
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| Joe Ricard |
Sep 16 2007, 08:53 PM
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#2
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CUMONIWANNARACEU Group: Members Posts: 6,811 Joined: 5-January 03 From: Gautier, MS Member No.: 92 |
What is the micrometer measurement of the crank rod journal.
What is the Micrometer measurment of the rod bearing when torqued down. the difference is your bearing oil clearance. |
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| toon1 |
Sep 16 2007, 09:14 PM
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#3
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Senior Member Group: Members Posts: 1,849 Joined: 29-October 05 From: tracy,ca Member No.: 5,022 |
thank's Joe, I am going to have to wait till tomorrow to get those measurments. I don't have a Mic. here.
I just checked the main bearings on the carnk and it spins freely whem installed in the case half. I think I have oversize rod bearings. |
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| toon1 |
Sep 16 2007, 10:07 PM
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#4
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Senior Member Group: Members Posts: 1,849 Joined: 29-October 05 From: tracy,ca Member No.: 5,022 |
I checked a different set of bearings to see if they might be different, the same thing happened.
I am noticed, there is a shiny spot on the bearing suface where the two halfs join. I too the two bearing halfs and wrapped them around the jurnal w/o the crank and they mated up fine. also, I noticed, on the back of the bearing there is a 025 on the back. |
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| sww914 |
Sep 16 2007, 11:16 PM
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#5
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Advanced Member Group: Members Posts: 2,439 Joined: 4-June 06 Member No.: 6,146 Region Association: None |
That 025 means 1/4mm. They are the wrong bearings for std/std.
They should say something like 0.00/0.00 or std/std. |
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| toon1 |
Sep 16 2007, 11:36 PM
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#6
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Senior Member Group: Members Posts: 1,849 Joined: 29-October 05 From: tracy,ca Member No.: 5,022 |
QUOTE(sww914 @ Sep 16 2007, 10:16 PM)  That 025 means 1/4mm. They are the wrong bearings for std/std. They should say something like 0.00/0.00 or std/std. Yep! I did a little research and found that there are the wrong bearing. Thank's for the replies. Keith |
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| Joe Ricard |
Sep 17 2007, 10:56 AM
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#7
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CUMONIWANNARACEU Group: Members Posts: 6,811 Joined: 5-January 03 From: Gautier, MS Member No.: 92 |
Now when you get the right bearings it is still a good idea to ensure you have the desired oil clearance.
Plasti gauge is the shade tree way but it does work. |
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| brer |
Sep 17 2007, 11:42 AM
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#8
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Advanced Member Group: Members Posts: 2,555 Joined: 10-March 05 From: san diego Member No.: 3,736 Region Association: None |
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