Topic: Cylinder head bolt retorque?

[dexetr30]

Do the bolts need to be re-torqued when installing a new cylinder head? I'll be doing the work either tomorrow or Tuesday. Depends when the shop gets finished with the head. If it needs to be re-torqued, what's the process?

[sharpxmen]

per FSM: tighten bolts in circular patter 1 to 10 starting with the center one on passenger side. 3 steps for tightening 25ftlb, 45ftlb and then on the last one 110ftlb except for bolt 7 (is the one on the driver side closes to the radiator) which is 100ftlb. bolt 7 needs sealant on the thread, it is not capped and the hole goes into the water jacket inside the block. doesn't specify re-torque, i usually do that after 300 miles but that's with an aluminum head, the Jeep is cast steel so i don't know to be honest.

[dexetr30]

Okay, now I'm really confused because my Hayes manual says: "Coat the threads of stud bolt (no. 8 in the tightening sequence) with Loctite Pipe Sealant  with Teflon no. 592 (or equivalent)."

According to my diagram, # 8 is the front most, driver side. My Jeep is a 2002. I'm also wondering if I should coat the threads of the remaining bolts with clean motor oil or grease of some kind before torquing?

Thanks for the help. 

[dexetr30]

I just went out and checked. # 8 (as shown in the Hayes manual pic I posted) does indeed pass through the water jacket. # 7 as shown in the fsm does not.

[sharpxmen]

in the 95 FSM #7 is where you have #8, like i said, driver's side closest to the radiator (which is the same one regardless of the numbering, difference between the 2 manuals is where you start the numbering going clockwise, in your case is the center one on the driver's side, the 95 is the center one on the passenger side, doesn't really matter which one you start with as long as it is one of the 2 in the center)

EDIT: ! make sure you clean the holes so there's no water or oil in them before you install the bolts, otherwise you crack the block.

you put a drop of oil on the threads (except for the one with the sealant of course) and a also little bit under the head of each bolt.