1. Torque all bolts gradually to 18 lbft in sequence shown in Fig 11; 2. Repeat sequence bringing torque to 22 lbft on all bolts except #9. Torque #9 to 29 lbft; 3. Repeat sequence turning all bolts 120 degrees (two flats) except for #9 turn 90 degrees (1/4 turn).
If you don't have the torque sequence figure 11, I can scan it and post it for you. Just let me know.
------------------ Dr. Ian Malcolm: Yeah, but your scientists were so preoccupied with whether or not they could, they didn't stop to think if they should. (Jurassic Park)
Use any of the silicone based sealers that come in a toothpaste tube like Permatex. I'd probably use the copper-colored one for this area. You only need to apply it to bolts 9 & 10 according to the diagram.
Bloozberry on the push rods how do i properly install/adjust them i read that you can not adjust the valve lash do you have the info on this as well i really want to thank you for the help
[This message has been edited by krum (edited 01-20-2014).]
That's correct. There is no valve lash adjustment. You just torque the rocker bolts to spec. However, you need to make sure there is no tension on each bolt when you tighten it, or you'll get a false torque reading. So for each bolt, you have to turn the engine until the corresponding lifter drops down to its lowest point before torquing it.
According to the Haynes manual, the torque spec for those bolts is 20 ft-lb for '84 and '85, or 24 ft-lb for '86-'88.
1. Torque all bolts gradually to 18 lbft in sequence shown in Fig 11; 2. Repeat sequence bringing torque to 22 lbft on all bolts except #9. Torque #9 to 29 lbft; 3. Repeat sequence turning all bolts 120 degrees (two flats) except for #9 turn 90 degrees (1/4 turn).
on step 3 what does (two flats) mean, and on step 3 do i still use the torque wrench?
[This message has been edited by krum (edited 01-21-2014).]
The two flats comment refers to the flat sides of the bolt head. The bolt head is a hexagon, so the sides are 60 degrees apart. Two sides is 120 degrees. And if your socket has a hexagon top, you can use that as a frame of reference as well.
You don't necessarily need to use a torque wrench for the final step. You're not going to be torquing the bolts to any particular torque setting, anyway. You're just going to turn them a certain distance (either 90 degrees or 120 degrees, depending on the bolt).
ok so the 90 and 120 ill just use a 1/2 ratchet i thought that the last step i would lose the torque settings if i used the ratchet but if i used the torque wrench i wouldnt be tighting the bolt anymore so i didnt know what to use on the final step so the ratchet will be fine? i just dont wanna over tighten the head bolts with the ratchet
[This message has been edited by krum (edited 01-21-2014).]
im so confused i found a manual online it a chilton 84 to 88 it says for the 84 2.5l does 92 ft. lbs. seem right Torque in three steps in sequence using thread sealer a. 1 st step: 31 ft. Ibs. b. 2nd step: 62 ft. Ibs. c. 3rd step: 92 ft. Ibs.
Originally posted by Bloozberry: Use any of the silicone based sealers that come in a toothpaste tube like Permatex. I'd probably use the copper-colored one for this area. You only need to apply it to bolts 9 & 10 according to the diagram.
Yes, sealant only on bolt/holes that are wet after install w/ oil/coolant.
"turn to X°" above are "new" specs and used on all older engines. This step does not need a torque wrench.
While these specs look like Torque To Yield to many, Bolts aren't. Use New bolts because Many OE bolts are made weak and 30+ years doesn't help. Big problem for 84-86 dukes. Beside that, Bolts 1 and 2 get allot of heat stress because of exhaust port setup.
WHY would you put Sealant on the threads in a "DEAD End bolt Hole ??? There's no coolant to creep up the threads. ( It's not like other GM engines where the bolt holes are tapped into a water jacket .) What is their "reasoning" for recommending this?
Actually, first they were torqued to whatever the Haynes manual said in the main write up. It was smoking white pretty bad then I noticed the specs for the 84 was different than the other years. New bolts and 92 lbs did the trick.
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