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Mod | | | Forums66 Topics128,083 Posts1,055,967 Members48,430 | | Most Online14,466
Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
| | THANKS!
For helping keep this great
old truck web site
on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
| | | | Joined: Dec 2020 Posts: 281 'Bolter | | 'Bolter Joined: Dec 2020 Posts: 281 | 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.
1947 3600 Chevy
| | | | | Joined: Feb 2004 Posts: 29,782 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,782 | 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
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
| | | | | Joined: Dec 2020 Posts: 281 'Bolter | | 'Bolter Joined: Dec 2020 Posts: 281 | Thanks, Jerry. I knew enough to support the wrist pin when tightening it, but a good reminder is always welcome.
1947 3600 Chevy
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