Which Rocker Arms Do I Have?

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bodavis100

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#1

• Aug 28, 2013

• #1

I am in the process of putting my 351w back together and i do not know if i need to bolt the rocker arms down in a special way. I do not think my heads are stop lock anymore but i do not know. If not do i adjust for valve lash or find tdc on each cyclinder and torque down. This is my first engine so all help is appreciated. The rocker arm has a bolt no stud as picutred

 

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rbohm

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#2

• Aug 28, 2013

• #2

you have what are known as pedestal mount rockers. you just install the rockers and the pedestals and torque the bolts to spec. its that simple.

 

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bodavis100

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#3

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Thanks for your reply. Does each piston need to be tdc or can i torque em where they are.

 

madspeed

Colonel Mustard

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#4

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yes, each needs to be at tdc when tightening properly

 

rbohm

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#5

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bodavis100 said:

Thanks for your reply. Does each piston need to be tdc or can i torque em where they are.

Click to expand...

torque them where they are, its all the same in this case. if the arms were adjustable, then i would say set each cylinder at tdc before adjusting the arms.

 

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Gearbanger 101

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Aug 28, 2013

#6

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rbhom is 100% correct. Stamped steel stock rockers just crank down until they bottom out on the shoulder of the nut.

Aftermarket rockers require each individual rocker to be set while on the base circle of the camshaft (valve at it's most closed position). In which case you tighten them down to approx. 18-22lbs at zero lash. Shims may be required to attain the proper setting in that case.

 

Last edited: Aug 28, 2013

madspeed

Colonel Mustard

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#7

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well...

http://sbftech.com/index.php?topic=318.0

 

rbohm

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madspeed said:

well...

http://sbftech.com/index.php?topic=318.0

Click to expand...

note that the title of that thread is;

View attachment 125333
Adjusting Pedestal Mount Roller Rockers

Click to expand...

stamped steel rockers are different.

 

madspeed

Colonel Mustard

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#9

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well done, I missed that detail

 

rbohm

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Aug 30, 2013

#10

• Aug 30, 2013

• #10

actually roller rockers are not that much different either when talking about pedestal mounts. the procedure listed is a left over from adjustable rocker arms from years ago. they even mention doing that procedure with positive stop rocker studs as well, but again all that needs to happen with those is you just bolt down the rocker arms nuts until they bottom out on the stud shoulder.