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ENGINE REBIRTH
#1
My service manual states to torque the rocker bolts to 16-18 ft. lbs since they are non adjustable. When torquing it feels like I'm pulling treads and not reaching spec. I'm afraid to break rocker bolt. Lets here from a builder HELP PLEASE.

Alan L.

[Image: 1_30_09_13_10_12_32.png]
Alan L
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#2
not2old;18123 Wrote:My service manual states to torque the rocker bolts to 16-18 ft. lbs since they are non adjustable. When torquing it feels like I'm pulling treads and not reaching spec. I'm afraid to break rocker bolt. Lets here from a builder HELP PLEASE.

Alan L.
Rocker bolts=studs ? Did you chase the threads with a tap first ? --16 to 18 is nothing...Is the stud stripped ? pull it out & check the threads...then take a regular bolt the same size & see if it threads in easy & if you can bottom it out..When it bottoms out mark the length with a piece of tape & compare it to the stud to make sure the stud is the correct length


LOVE OF BEAUTY IS TASTE..THE CREATION OF BEAUTY IS ART
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#3
Getting close to completion of the engine soon. After intake and carb OH, should be ready to install. Just need to line up,the son's for help. The break in oil has an odd smell to it when adding, must be the additives.

Once running and driving will need to go to exhaust shop to realign pipes. Previous owner must have had headers removed and welded in pipe while car was jacked because pipes are hitting floor pans.
Qcode351mach;18125 Wrote:
not2old;18123 Wrote:My service manual states to torque the rocker bolts to 16-18 ft. lbs since they are non adjustable. When torquing it feels like I'm pulling treads and not reaching spec. I'm afraid to break rocker bolt. Lets here from a builder HELP PLEASE.

Alan L.
Rocker bolts=studs ? Did you chase the threads with a tap first ? --16 to 18 is nothing...Is the stud stripped ? pull it out & check the threads...then take a regular bolt the same size & see if it threads in easy & if you can bottom it out..When it bottoms out mark the length with a piece of tape & compare it to the stud to make sure the stud is the correct length

rockers came with new bolts and fulcrums

[Image: 1_30_09_13_10_12_32.png]
Alan L
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#4
Seems like having tension on the rockers because of the springs would affect the torque. If you rotate the engine to take the pressure off as much as possible it might make a difference. Also you might click it at 10 ft lbs then 16 ft lb just to make sure your not over tightening.

+1 on chasing the threads

My garage http://www.7173mustangs.com/forum-garage...rxt_uid=40

73 mach 1 351c 4v cc ported, torker2, 750 edelbrock,C6.
73 fastback 351c 2v,performer intake,600 edelbrock,fmx, 325 trac-lok.
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#5
Thanks..... getting close and getting nervous

[Image: 1_30_09_13_10_12_32.png]
Alan L
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#6
Hang in there, Alan. I know how you feel.

I'm waiting on parts so I can start putting things together again. Good luck!

Doc

Doc

[Image: 6y14ea.jpg]

Project started 8-7-10
Completed: All new suspension, rebuilt 351C H Code bored .030 over with mild cam and intake, new 3.50 TracLok, custom exhaust system
Current "mini-project": interior upgrade Undecided
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#7
I know exactly how you feel. Gotta love it! Make sure your torque wrench is working properly and if still concerned and have the click type then I would get the beam type torque wrench. Good to be safe than sorry! I use the beam type on all aluminum parts.
Fire it up! Smile
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#8
Looking for my receipt now. After using on heads settings not correct for lesser torque settings. Broke rocker bolt off but no problem getting it out and replace. Did have a beam type back in the early 70' but gee not sure where I put it. Tongue

[Image: 1_30_09_13_10_12_32.png]
Alan L
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#9
Alan, I'm going to start a 351C rebuild later this year, but I'm like you, it's been decades since I tore an engine down. It looks like all I need to do is review all your threads when I start my rebuild as you seem to be asking all the right questions.
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#10
As I was advised, take lots of before pics. Pulleys, brackets,vacuum lines, electrical connections and so on. Also label and put all nuts and bolts in zip lock bags. Also as I learned, don't jump around on mini projects thats when I misplaced a few parts because of cold weathers months went by and my memory is not torqued as it once was. Good luck, it all comes back with help from the members and manuals.

Alan L


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Alan L
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