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Oh Lord, I just gotta find it....
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Jan 21st, 2020
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Joined: Dec 2020
Posts: 70
OP
'Bolter
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I am rebuilding my 59 235 after it came back from the machine shop. I have searched several times in the manuals but I have not found the piston pin rod bolt torque spec. I can go with the normal 3/8 fine thread torque standard but I would like to know what the Chevy spec is. I found the mains, rods, and head bolt torque but the piston pin I have not found. It would be nice if someone that has that type of info would put it on a spec sheet and sell/market all the torque specs for the old AD trucks. I would buy it  My truck is a 47 3600 but it had this 59 235 in it when I bought it. It sat for 40 some odd years and was stuck tight.
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Joined: Feb 2004
Posts: 24,558
Kettle Custodian (pot stirrer)
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It's a 3/8-24 bolt. 30-35 ft/lbs is about right. Be sure to support the wrist pin by clamping a tapered punch in a vise and slide the pin over it to avoid twisting the I beam section of the rod while torquing the bolt. Back when these engines were built, mechanics were assumed to have some common sense.
Jerry
"Freedom's just another word for nothing left to lose"
Kris Kristofferson
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
WAG MORE- - - - - -BARK LESS!
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Joined: Dec 2020
Posts: 70
OP
'Bolter
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Thanks, Jerry. I knew enough to support the wrist pin when tightening it, but a good reminder is always welcome.
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