Wrist pin bushing - 1931, 60

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What would be in a kit? You might try any engine rebuild shop or machine shop. Try a NAPA store also.

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Are you trying to bush the small end of the rod or the pistons?  Buick used "semi floating" wrist pins in 31, meaning the wrist pin pivots at the piston only, the wrist pin has a relief machined across it's width on the center of it's length and small end of rod has a clamp bolt that passes thru the relief to positively clamp the pin to the rod and prevent it from coming out of the side of the piston and scoring the cylinder wall.  There are no circlips in the original pistons to retain the wrist pin, they weren't needed.  If during the cars life someone replaced some or all of the pistons the replacements may have had larger pins and small ends of rods may have been bored out to accept them, I had a 31 80 series car that had 6 original iron pistons and 2 aluminum pistons that had oversize pins.  The small ends of the 2 rods had been bored to accept the larger pins.  I installed 8 new pistons with standard size pins and had the small ends of the 2 rods welded up and resized to original dimensions.  Putting a bushing in the small end of the rod is probably not a good idea, either find a couple of rods or have yours welded up and machined back to size on a Bridgeport mill by a reputable machine shop.


If your bushing problem is with the pistons and you are using the original iron pistons that's a machine shop job to have them re-bushed.  I'm not sure who will have aluminum replacements, the source used to be Egge Machine and they have babbiting services.


Keep us posted on what you decide to do...



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