Posted by Steve@Advance on April 21, 2022 at 19:46:02 from (99.190.215.237):
In Reply to: Kubota V 1902 engine+ posted by Ivan in Mich on April 21, 2022 at 19:05:22:
It's possible the bearings are made wrong, mis boxed, whatever something is seriously wrong! Good that you caught it!
I would check the new rod bearings against the old ones. You can check the thickness with calipers near the ends, there will be little wear there. They should be very close to the same thickness. If the new ones are .005 thicker, they are .010 under and mis marked.
Bad news is if they are the wrong bearings, and the rods were torqued down on them, chances are the rods are now out of tolerance. The safest thing to do would be to have the rods reconditioned and buy another set of bearings from the shop that reconditions the rods.
Other things can cause the lock up though, pistons in backwards, rods in backward, caps reversed or mixed, or debris under the bearings. Whatever the cause, rods are very sensitive to distortion. Not a place to be cutting corners!
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