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Assembling piston/connecting rod (454)

You can do it but you must be very careful as it is easy to break a piston. I would leave it to the machine shop. When i rebuilt my last motor i went with floating pistons so i could do it myself without worry.
 
Yeah you need a press , and a way to hold the parts so you don't put pressure on the piston .

If you do it yourself at home , pay attention to the rods that sit next to each other on the crank , and make sure the sides that face the throws do , and the sides that face each other do . IIRC flats to the inside and chamfers to the throws .
 
Press-fit are exactly that. Floating pistons use double spiral locks (snap rings) on each side to keep the wrist pin in its place instead of having a press fit.
 
It is cheaper to have a machine shop do all of them, than to buy another piston. Made that mistake once. I screwed up one piston, and two weeks later when I got the replacement, I took the rest of them to the machine shop.
 
If you are going to assemble the pistons yourself, I recommend a floating piston. The other style has to be pressed, which if not done correctly, can result in a broken piston. The floating pistons use something similiar to a snap ring, but it isn't called that. And I can't remember the name of them either. Anyways, the floating pistons assembly would be the easiest.
 

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