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rocker arm stud torque

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Old Sep 10, 2008 | 08:00 PM
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From: Rockledge FL
Default rocker arm stud torque

i needed to replace the guide plates in my 72 BB.

i did some measuring and they had 5/16 diameter guide plates and push rods which i discovered were for small blocks.

my searching has found two torques to reinstall the rocker arm studs when i put it all back together. 45 ft/lbs and 60 ft/lbs.

which one is correct. neither of my manuals give a torque reading for that stud.

thanks
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Old Sep 10, 2008 | 09:05 PM
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I usually do 60 lbs in iron heads...I have no idea if that's 'proper' or not, and if you'd need to do less with aluminum heads.
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Old Sep 10, 2008 | 09:33 PM
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sweet thanks,

other than just stupid,
why would someone put small block pushrods and guide plates in a big block motor.
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Old Sep 11, 2008 | 07:59 AM
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Originally Posted by baxsom
sweet thanks,

other than just stupid,
why would someone put small block pushrods and guide plates in a big block motor.

I don't really understand how small block plates would even fit on big block heads.

Small block Guide Plates:


Big Block Guide Plates:
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Old Sep 11, 2008 | 08:26 AM
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Originally Posted by baxsom
sweet thanks,

other than just stupid,
why would someone put small block pushrods and guide plates in a big block motor.
That would be impossible.
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Old Sep 11, 2008 | 01:02 PM
  #6  
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From: Rockledge FL
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maybe so but without a shadow of a doubt the guide plates bolted into my heads have 5/16 holes matched to 5/16 pushrods.

i cant find anything that says that big blocks ever used 5/16 pushrods.

i called summit and they in turn called comp cams
neither one of their tech depts knew of any 5/16 pushrods or guide plates for the big block

(ps those pictures dont show up)

here is a pic of my current guideplates as well as my dial calipers measuring the pushrod slot showing 5/16.




Last edited by baxsom; Sep 11, 2008 at 01:10 PM.
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Old Sep 11, 2008 | 04:27 PM
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Those are not small block guide plates.
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Old Sep 11, 2008 | 05:26 PM
  #8  
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ok then that explains that then but not why such small guideplates and rods were installed in the first place when everything i have read says that 3/8 or 7/16 were standard in big blocks

did big blocks ever come with 5/16 pushrods.
i cant find anywhere that says it did.
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