Im installing new pistons in my 2005 Ford Ranger 3.0 as part of an engine rebuild I’m undertaking. I pressed new wrist pins and pistons onto factory connecting rods by heating the end of the connecting rod with a torch. Unfortunately, I couldn’t come up with any ideas for a jig that would help me perfectly center the wrist pins in the connecting rod in time before the connecting rods cooled, so I just did it by hand and tried to center it as best as I could, but am uneasy about the results as it is my first time doing any real internal engine work.



When the connecting rod is perfectly centered in the piston, the wrist pins protrude from the piston I want to say at most 1/8-3/16” from the piston on one end and perfectly flush or are very close to sitting flush on the other end of the piston. They will be a good ways away from the actual cylinder wall after final assembly, but I just wanted to know if them not being perfectly centered is something I would need to address or if they will be fine as is? I just want some advice as I’m fully aware that I will most likely end up doing more harm than good trying to make any adjustments. Thanks in advance!

 

There are full floating and semi-floating wrist pins

Full floating will have a C-clip on each side of piston to keep wrist pin centered and it "floats" in piston journal and connecting rod journal
Easy to remove these wrist pins

Semi-floating has no C-clips and floats in piston journals but is press fit in connecting rod

If you have full support in both piston journals and no protrusion outside the piston then it will work fine