engine rebuild

[bowerboy_1]

Im rebuilding a 6 bolt and i put standard clevite bearings on the mains and rods, and 2g pistons.
I used coastal assembly lube on the mains and lubriplate white assembly lube on the rod bearings i also put 10W40 on the cyl walls.
but it wouldnt turn when i went to turn it.
are there smaller bearings than standard size?
what can I do to fix this, I heard someone say that clevites are thicker than the oem standard bearings, is this true?
anything will help.

 

[half-cocked]

Are you using ARP rod bolts and if so sis you have you rods resized?

 

[anconover]

did you check your clearances or just slap it together and try to spin it?

 

[GalantGst]

yea u have to check all the clearences or ur "rebuild" is not worth shit.

The first time i put a motor together i mixed up the rod caps dam that was a bi***

 

[foreverinvayne]

well, you could get oversized bearings... they're made for when the journals are a lil bigger for the rods to increase the clearance between them. THat might be possible. Otherwise check all of your oil clearances, and make sure you didn't put on any caps backwards or mixed them up. But believe me, in school we were rebuilding some motors and for some reason we went to put in standard size bearings on one of the rods and the crank woudlnt' turn... we were putting all our weight trying to turn it, it tore the **** out of the bearings... prolly messed up the crank too, but it didn't matter, they were never gonna actually get run. But yea, the moral of the story is yea, we ended up getting some bad bearings and had to get different ones even tho they were supposed to be standard. so check all of them and see.

 

[2bar]

oversized bearings will give you more clearence than a standard bearing will. but a undersized bearing is for when you have the crank turned. since the diameter of the journal is smaller then you would need a undersized bearing. if you have undersized bearings instead of standard the clearence would be to tight and the crank would not turn. Make sure you are using plastigauge to check clearences. and make sure your bearings are standard. Also when you are torquing your mains and rods make sure to do them in steps. exp. if you final torque is 60lbs. start at 20lbs then make sure the crank turns, then 40lbs and turn crank then 60lbs and turn the crank. this will make sure you will not run into problems

 

[Baron4406]

Everytime you do a rebuild you should have some plastiguage, alot of guys think its junk............well it won't give you as accurate readings as a micrometer for sure. However one thing it will do perfectly is tell you if your bearings are the right size. If your bearings are one size off (mismarked/mispackaged bearings happen all the time) it will show up as a gross error trust me. So right now get a service manual (or something else that will give you the proper clearances) and get some plastiguage. You didn't "hurt" anything yet, so just relax. When things are put together right that crank should turn like its on ball bearings. Also do the other things guys here suggested, check to make sure you got everything on the right way- pay special attention to the main bearing caps. Make sure the arrow points the right way............uh......don't ask me how I know!! Good luck.