rocker arm tightening

[steechfinger]

im reading my manual and it says to tighten the bolts on the rocker arms to 18-25 ft.lbs dose that mean to tighten them to 18 and then re tighten them at 25 or to tighten them from 18-25down the line like the 1st cylender is 18 and the 2nd is 20 and so on and so on im confused

 

[miesk5]

im reading my manual and it says to tighten the bolts on the rocker arms to 18-25 ft.lbs dose that mean to tighten them to 18 and then re tighten them at 25 or to tighten them from 18-25down the line like the 1st cylender is 18 and the 2nd is 20 and so on and so on im confused

it's just the range to torque

torque all to 20 ft lbs; listen for tapping and adjust where nec for each

 

[swampthing]

all the ford motors i built i just tightened them all up put a little force to them went back over them all and it was good but as miesk said 18-25 is the range which your best bet would be to tighten to between 23 and 25

 

[steechfinger]

so i need to tighten them and listen for tapping . so i need to put the intake back on and leave the valve covers off , fire it up and tighten where its tapping at. or can i leave the top half of the manafold off

 

[BLADE262US]

You just tighten them up to that torque , The mid 70,s on up have whats called pedastal mount rockers there non adjustable you just tighten them and your done , No adjusting . /emoticons/[email protected] 2x" width="20" height="20" />

 

[steechfinger]

thats it so what should i set my wrench to? 18-25 or 23 like swampthing said

 

[BLADE262US]

Set the wrench wherever youd like between 18 and 25 /emoticons/[email protected] 2x" width="20" height="20" />

 

[steechfinger]

one more thing i know i need to bring the engine to top dead center when i tighten the bolts but do i need to center each cylinder when i tighten them or alls i have to do is tighten and they will adjust them selfs

 

[BLADE262US]

just bring the cylinder up on compression stroke that means that both valves will be closed and tighten the rocker arm bolts down they will line themselves up and to save you some time once you bring one side up TDC there will be one on the other side of the motor that is also TDC so you dont have to roll it over as much . /emoticons/[email protected] 2x" width="20" height="20" />

 

[steechfinger]

so really i only have to bring 4 cylenders to tdc instead of all 8 that seems pretty easy

 

[steechfinger]

oh man my book for the bronco is printed wrong according to it i have the wrong rocker arms mine look like the 7.5 diesels and that cant be right its the chilton book and it always gives me wrong info so if you are doing what im doing just follow the directions for the 7.5 engine and its all layed out

 

[Broncoholics]

Maybe you have hydraulic lifters. This is a totally different deal.

You have to go in the direction of the firing order and find TDC.

Usually once you find TDC you can turn the crank 1/4 turn at a time for each cyl in the direction of the firing order. Make sure you know the firing order it doesn't go 1,2,3 or down each side of the motor. Once you're on #1 TDC, tighten the nut while twisting the push rod with fingers until you get tension on the rod. Then its about 3/4 turn to set the pre load on the hydraulic lifters. If you go to far or not enough most times its gunna be fine as the hydraulic lifters compensate.

Another time when I got a bad tick, I pulled the valve cover and couldn't tell which one was making th enoise. I was in the woods wheeling so I did the quick check and backed each rocker off one at a time until I could physically hear the tick. Then go to the next until I found it. Re-tighten until the tick goes away + 1/2 turn. Then when you get home do it the right way. Its not easy and does take time.

 

[steechfinger]

well i followed the order the book told me and i tightened them to 18lbs and then went through and retightened to 22so there all at 22 now so i hope its good i havent fired it up yet to see if it ticks but im guessing its good if i dident do it right let me know so i can re do it

 

[1982 bronco lifter]

it means a range of 18 to 25 ft-lbs

 

[Broncoholics]

Did it work?

 

[steechfinger]

havent started it yet i need a day off to finish putting it back together