Hey guys in a bind. Trying to put my motor together and need the toque specs for the Mains, Rods and Heads. I know I had a book somewhere, but I can't find it :rant:
Torque Specs - anyone got a Haynes or Chiltons ASAP
arkracing
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Except starting in 1989? The block is an '89 and I'm using a '91 "A" code head.
I see your in CT too -
Thanks,
Andy
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Thanks - I bought a set of Fel-Pro Head bolts as well and that is what the instructions said to do as well. I figured that I would double check, as I've never run into a motor that wants you to turn the bolt 90 degrees.
Thanks for the help!
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654 Posts
all new chevy engines have "torque to yield bolts".. basically you torque them, then do an angle additional turn to them. this stretches the bolt and causes it to keep better tension on whatever you're tightening. these bolts are never re-used, and tossed when taking them out
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Does this apply to bottom end bolts too? You saying I should purchase new connecting rod & crankshaft bolts b/c they too are stretched?
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Dude, I have reused my head bolts 3X now, they are fine, my uncle (GM Mechanic) reuses them and my Grandfather (Retired GM Mechanic) also does this. I used 105 on the head bolts and 37 on the rods, 75 on the mains.
Course I have a knocking noise after a 2 hour drive now, but I did have to use some other questionable parts that I wish I had never considered, plus the radiator blew out on me on that trip and overheated the motor. The radiator had a crack in it that had been there a while (was rusted).
Course I have a knocking noise after a 2 hour drive now, but I did have to use some other questionable parts that I wish I had never considered, plus the radiator blew out on me on that trip and overheated the motor. The radiator had a crack in it that had been there a while (was rusted).
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29,133 Posts
the new motors use torque to yield......the 2.5 is not a new motor.
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Yeah yea... I was using them regardless lol. I figured it wouldn't be bad but I wasn't sure what was meant by "new" chevy engines!
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if i'm building an all new motor i try to use new bolts but the old ones on older engines can be reused.
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