bushings
the oil holes have to be lined up in the bushings to rod.you press the old ones out and the new ones i would freeze them in your freezer take them out one at a time and quickly press them into the rod.you can also put the rods in your oven at 450 for about 25 minutes and put the bushings in that way but the freeze method is safer.heating you need a thick pair of asbestos gloves or similar types.you can cold press them in the rods but sometimes you will need a reamer to size them for the wrist pin.the machine shops don't charge much for doing this though might be cheaper in the long run.
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