RE: Rockerarms adjustment
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RE: Rockerarms adjustment



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If you are working with a hydraulic cam here is the way. Most of the after-market cams like Comp-Cams these days like you to run the lifters pretty close to fully extended to prevent lifter-pumpup and valve float. They need to be adjusted with the lifter on the heel of the cam or ideally 180degress away from the maximum high point of the cam lobe. Probably the safest way to set these up then is one valve at a time, spark plugs out. Start with the first valve on the front of one of the heads and work all the way down one head, then do the other. I like to put a spring-type clothes pin on the rocker when I have finished adjusting a valve so if the phone rings, I spill my coffee, whatever, I know where I stopped. Use a ratchet or breaker bar on the damper wheel bolt and turn the engine clockwise until the pushrod for the valve you are adjusting hits it's high point and just starts back down. Continue to turn the crank 1 full turn (crank turns 1 full turn to get cam to turn 180degrees). Now you are ready to set the first one.

Now, use 1 hand to turn the pushrod and another to tighten the adjusting nut carefully until you just feel the pushrod drag while turning it. Turn the adjusting nut back and forth a little to make sure you are just at the point where the drag can be felt. Now, thighten the adjusting nut about 3/4-1 turn and that one is set. If you are using self lock rocker nuts you are done. If you are using set-screw-lock type rocker nuts make sure you torque the setscrew to the mfr's tightening spec or the valves will all loose up in very short order, pieces will fall into the basement of the engine, the crying and inventing of new 4letter word phrases will comence. Repeat 16 times and you are done.

If you are working with a solid lifter cam you can use the same procedure as above to get the tapppet to the heel of the cam. Now using a feeler gauge of the correct thickness per the cam mfr's direction you will insert the feeler gauge between the rocker arm roller and the valve stem and adjust for a light slip fit of the feeler gauge. You do not pre-load the solid lifters, they need to be run with specified valve clearance.


From: roger langley <roadstar15@xxxxxxxxxxxxx>
Reply-To: 1962to1965mopars@xxxxxxxxxx
To: 1962to1965mopars <1962to1965mopars@xxxxxxxxxx>
Subject: Rockerarms adjustment
Date: Sun, 1 May 2005 14:14:24 -0700 (PDT)

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I am putting together a 383 and need an answer. Installing roller rockers. When the push rod just touches the rocker, my friend says to tighten the adjustment screw 1 full turn past that point, my son says when the push rod just touches the rocker to back off 3/4 of a turn. They are 1.6 CAT roller rockers. Who is right?

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Please address private mail -- mail of interest to only one person -- directly to that person. I.e., send parts/car transactions and negotiations as well as other personal messages only to the intended recipient, not to the Clubhouse public address. This practice will protect your privacy, reduce the total volume of mail and fine tune the content signal to Mopar topic. Thanks!


'62 to '65 Mopar Clubhouse Discussion Guidelines:
http://www.1962to1965mopar.ornocar.org/mletiq.html.



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Please address private mail -- mail of interest to only one person -- directly to that person.  I.e., send parts/car transactions and negotiations as well as other personal messages only to the intended recipient, not to the Clubhouse public address. This practice will protect your privacy, reduce the total volume of mail and fine tune the content signal to Mopar topic.  Thanks!

'62 to '65 Mopar Clubhouse Discussion Guidelines:
http://www.1962to1965mopar.ornocar.org/mletiq.html.


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