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Head Bolt torque specs

44K views 8 replies 3 participants last post by  MyMopar 
#1 · (Edited by Moderator)
Does anyone know the torque specs for these bolts?
  • Head bolts (big ones)
  • Head bolts (slmall ones)
  • Rocker-bar bolts
  • Head cover bolts
  • Big Pulley bolt

I'm in the middle of taking my heads off for a cam install, and these ones seem a bit important.

I've got a 5/7L Hemi engine.

Thanks!
 
#2 · (Edited by Moderator)
Here you go, Trent.
Cylinder head:

  • M-12 Bolts
    • Step 1 34 Nm (25 ft. lbs.)
    • Step 2 54 Nm (40 ft. lbs.)
    • Step 3 Turn 90°
  • M-8 Bolts
    • Step 1 20 Nm (15 ft. lbs.)
    • Step 2 34 Nm (25 ft. lbs.)

Crankshaft pulley bolt spec is 129 ft. lbs.

Here`s the tightening sequence for the rocker shafts.



and torque specs:
195 inch pounds.

Trent, make sure you note INCH pounds. Not foot pounds. Realistically you can just tighten them by hand until they`re tight. Just be careful not to overtighten. You can strip the threads.

Here`s the valve cover sequence.



The torque specs are 70 INCH pounds.

Is there anyone over there helping you?
 
#3 ·
Nope. I'm flying solo. It's not too difficult, but definitely going slower than yours did. :) BTW, I've got a head off, and I see there are 4 sets of 4 rollers that are held in by a plastic piece that's got a funny fastener holding it in. Do you happen to remember how to get this off?

Thanks for the specs!

Here you go, Trent.
Cylinder head:


M-12 Bolts
Step 1 34 Nm (25 ft. lbs.)
Step 2 54 Nm (40 ft. lbs.)
Step 3 Turn 90°

M-8 Bolts
Step 1 20 Nm (15 ft. lbs.)
Step 2 34 Nm (25 ft. lbs.)

Crankshaft pulley bolt spec is 129 ft. lbs.

Here`s the tightening sequence for the rocker shafts.



and torque specs:
195 inch pounds.

Trent, make sure you note INCH pounds. Not foot pounds. Realistically you can just tighten them by hand until they`re tight. Just be careful not to overtighten. You can strip the threads.

Here`s the valve cover sequence.



The torque specs are 70 INCH pounds.

Is there anyone over there helping you?
 
#5 ·
He is talking about the lifters. No need to remove them, spin the camshaft around a couple of times and the lifters will seat themselves out of the way in the MDS position. When pulling the camshaft out, try not to bump the roller lifters or they may drop down. When pulling the camshaft just rotate it a bit as it comes out.

Why didn't you call?
 
#7 ·
Yeah, lifters, I guess. I've attached a picture.

When you say you removed them, do you mean just the lifter, or also that bracket-of-4 thing as well?
 

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