My FSM left this number out. 1970 340HP manifolds. Best I could come up with (see attached) but is for different something.
340 exhaust manifold torque specs
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Tight. I don't think I have ever used a torque wrench on those. Remember to use some sealer on the front and rear ones. They screw into a water jacket.
Thanks for heads up on sealer, have that covered. I can't get a torque wrench in there but I can make a reasonable guess if I can torque at least one.
A 6" 3/8 drive ratchet shouldn't overtorque or a combination wrench. I always warm the engine up and snug them down as needed.
Was thinking just a snug would do it. If they leak, I'll snug them some more.
I think those are 5/16" bolts.
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They are 5/16 and for those reading this and are installing HP manifolds. There is a clearance issue, at least with "O" heads on drivers side, that does not allow manifold to sit flush with head so be careful. Had to make repairs to both center mounting tabs. Grind just forward of rear corner of head to correct. Sorry don't have any pics.
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I'll edit my post. It has been 15 years since I had those off.
I can't remember what I had for breakfast yesterday. Were all in the same boat at least I am.
You'll always go back and check them after a few heat cycles anyway.
340six
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5/16 studs on ends. I never did Toqure them. Just re-snugged um after a few heat cycles
And as far as not remembering goes. When your young you can say wow me and the guys went out last night. Can't remember part of what you were doing. Now that your older all ya gotta do is walk to another room of the house.......
Kendog 170
Let the boy go !
My Eddy hits the head on drivers side. I bought a head to manifold 1/4" spacer. Worked out great.
That will work too. Good thing you found it.
Gator
Mopar or No Car
The key to this question is I have never used a torque wrench and once you have tightened the bolts down be sure to check and retighten them after the car has reached operating temp. They will indeed need to be snugged up a little more..
Thank you Gator.
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