Posted by pburchett on March 17, 2019 at 07:20:24 from (12.182.196.81):
1955 Ford 640 134 ci engine.
I started refreshing my dad’s old Ford tractor. I have owned it since 2004 and never had to do much to it except for maintenance. I redid the rear axle seals and bearings, hydraulic piston pump, lift cover, PTO, front axle pin/bushing, spindle bushings and repacked the front wheels plus I have been cleaning and scraping grease for a paint job later.
I have worked on both sides of the engine as I dreaded that portion. Since the clutch was on its last adjustment I split the tractor for inspection. I now need a clutch, pressure plate, main bearings, and rod bearings.
I now need help inspecting the pistons. They are stamped STD and do show some signs of wear but I do not know if they just need new rings or if I need new pistons, wrist pins, and sleeves. I have not taken any measurements yet.
Going on visuals what is the consensus of these pistons? I tried to take photos of the worst looking portions.
If I need new pistons I might as well replace the sleeves. If I replace the sleeves I will shrink them with the welder.
I found some piston kits on eBay “BUT” they are starting to rust so I don’t know if they are usable. I don’t mind cleaning rust to save some money but don’t want wrist pins that would give problems later or sleeves that I am unable to drive into the block as that would defeat the money savings. What are the thoughts on these?
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