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Author Topic: Rocker Arm install ( HOW TO )  (Read 5581 times)

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4SPEED

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Rocker Arm install ( HOW TO )
« on: March 16, 2010, 04:54:30 AM »
Before I show you how I was shown how to install rockers, mine are not stock. if you are using stock rockers you just torque them to 20lbs and your done.
I am using a 1.52 roller tipped rocker with 7/16" BBC studs, stock push rods.
one way to set the lash is to run the nuts down to were they are just barley snug. and run the engine and set the lash of each rocker wile it running. this is way to messy, oil runs every ware .
I will try to show the best I can, how to set the lash with the engine not running.

first you need to find the #1 TDC (top dead center)   pull all the spark plugs out, ( easier to turn )  and turn the crank to bring up the timing mark to zero. then pull the distributor cap off to see if the rotor is on the #1 plug wire. if its on #6  turn the crank one more time bringing it back to zero. and check under the cap to confirm your on #1   If this is a new build make sure both dots on the timing gears are up before the timing cover gos on.


once that is done you can set the lash or install your new rockers on the  #'s  1,2,5,7 intake valve  and #'s 1,3,4,8 exhaust valves.
here is what it will look like for the #1 cylinder @ TDC.
drivers side

pass side


use assembly grease to install all the parts. a cam lube is fine if its a running engine. but on a new build and the motor will be setting for a few months, use assembly grease.  oils will run down off the parts in a few days. put grease on the ball before installing them and I dip the roller tip into a thick gear oil.

 
to to set the lash you, turn the push rod with your fingers while turning the nut. once you feel the presser on the rod stop (this is zero lash)


once there turn the nut a 1/2 turn to set a positive lash. I put the ratchet on facing south and turn it straight north , 1/2 turn and your done.



now to do the others you need to bring the #6 to TDC  , turn the crank 1 time to bring the timing mark back to zero. now your rotor should be on the #6 plug wire.
repeat the steps above for the #'s 3,4,6,8 intake valves  and  #'s 2,5,6,7 Exhaust valves.
then your done


if you use a poly lock nuts you do this the same except the poly nut will have a allen  set screw on the end that is tightened to the stud to lock it in place.  I used bbc studs and nuts so I can use my stock valve covers. with poly locks you will need a taller cover. 

SpankinElroy

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Re: Rocker Arm install ( HOW TO )
« Reply #1 on: April 01, 2010, 09:36:10 PM »
So what kind of performance boost did you get outta these things? I've been wanting to add a set to mine for years, and mentioned it to the guy that's going to dyno-tune my rebuilt carb this Monday. He said no need, that the stamped steel rockers are just fine. Thanks for that tutorial in case I go that route anyhow. Thoughts? :-\

4SPEED

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Re: Rocker Arm install ( HOW TO )
« Reply #2 on: April 01, 2010, 11:29:10 PM »
they will free up about 30hp to your motor.  I dont care what most say, zero friction ='s more horse power.  and they wont rattle as bad as the stamped rockers do.

4SPEED

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Re: Rocker Arm install ( HOW TO )
« Reply #3 on: April 04, 2010, 01:13:48 AM »
Mine was put on a dyno , both ways.  all stock rockers and intake with headers.
we changed the rockers and it added almost 30hp.
then added a performer intake, added 12 more hp. 

we did this for a test to see if there was any hp gain.

I have herd there is no difference in the stock and 2156 edelbrock manifold.
you prob could port and polish the stock intake and do a little better then the 2156.
I ported and polished the 6x8 heads and edelbrock intake , gasket matched both.
.030 over flat tops, nice little street strip cam, zero decked, .060 off the heads 9to1 on good pump fuel/ turbo blue 50/50 mix.
dynoed @ 384hp  , not to shabby for stock replacement parts.

but could of stroked it and got over 400hp and been money ahead.   

gorin002

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Re: Rocker Arm install ( HOW TO )
« Reply #4 on: April 13, 2010, 04:19:56 PM »
emmm okay dumb whats a rocker arm engine part

ThunderChicken

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Re: Rocker Arm install ( HOW TO )
« Reply #5 on: April 14, 2010, 01:20:30 PM »
emmm okay dumb whats a rocker arm engine part

Rocker arms go on the heads.  They open up your valves with the help of the pushrods and cam.
Bethany
1988 Flame Red GTA, 305 TPI--Bone stock heart, Flowmaster exhaust, Wonderbar coming soon!
1995 Medium Teal Blue Metallic V6 Firebird

Stock(ish) 1983 Black and Gold T/A, Edelbrock 600 Carb, Performer 2101 Intake-SOLD

gorin002

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Re: Rocker Arm install ( HOW TO )
« Reply #6 on: May 11, 2010, 01:15:48 PM »
emmm okay dumb whats a rocker arm engine part

Rocker arms go on the heads.  They open up your valves with the help of the pushrods and cam.

part of the cilinders ?

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Re: Rocker Arm install ( HOW TO )
« Reply #6 on: May 11, 2010, 01:15:48 PM »


 

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