Torque Specs
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Senior Member
Joined: May 2002
Posts: 973
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From: Avondale, AZ, used to be seattle, washington
Car: 1978 Chevrolet C10
Engine: 350
Transmission: Turbo 350
Torque Specs
well hopefully alter this week sometime i will be going and getting my heads back from the maching shop, and throw them back on...
but i need to know what are the torque specs on the bolts on the heads, top row and bottom row in the valve cover valley, and down by the spark plugs, i know the intake is 20 ft-lbs but not the others, please help. thanks
but i need to know what are the torque specs on the bolts on the heads, top row and bottom row in the valve cover valley, and down by the spark plugs, i know the intake is 20 ft-lbs but not the others, please help. thanks
Supreme Member
Joined: Jul 1999
Posts: 18,457
Likes: 16
From: Loveland, OH, US
Car: 4
Engine: 6
Transmission: 5
I strongly suggest you go buy a Chilton's or something, there's lots of useful stuff in there like that. Such as the torque sequence (what order to tighten them in), yes it matters.
Torque should be 60-65 ft-lbs. on all of them, in 3 or 4 steps, measure only while the bolt is actually moving - NOT "Breakawy" torque to start it moving; and go over them all one last time after they reach 60. Don't over-tighten them, it will cause more problems than leaving them at the low side of the spec. Use non-hardening sealer on the bolt threads and under their heads, such a Loctite PST or Permatex 300; NOT silicone.
Torque should be 60-65 ft-lbs. on all of them, in 3 or 4 steps, measure only while the bolt is actually moving - NOT "Breakawy" torque to start it moving; and go over them all one last time after they reach 60. Don't over-tighten them, it will cause more problems than leaving them at the low side of the spec. Use non-hardening sealer on the bolt threads and under their heads, such a Loctite PST or Permatex 300; NOT silicone.
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