getting the rocker adjustment correct

grumpyvette

Administrator
Staff member
ALLEN said:
Grumpy how can I adjust the new rockers on my newly rebuilt 383 engine, before i start it for the first time and get it fairly close to correct?

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hylifters.jpg

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most of the GIVE or clearance or movement in a hydraulic lifter push rod seat is the result of pressurized oil flowing into and lifting the push rod seat, without the pressurized oil entering the lifter body,from the sides of the lifter body from the oil passages in the block, manually forcing the push rod seat down into the lifter body is basically a one shot deal that generally only going to compress in a minimal .060 -.08 once until oil pressure forces the seat back up.

START BY FINDING ,an VERIFYING
TOP DEAD CENTER ON THE DAMPER AND TIMING TAB, are correct, THEN PRE-PRIME THE OIL PRESSURE MANUALLY

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many guys use a drill to spin the primer tool but thats a good way to burn up a drill, an air ratchet works better in my experience
read these links

viewtopic.php?f=54&t=985&p=1730#p1730

viewtopic.php?f=70&t=967

THEN FOLLOW ONE OF THESE ROUTES AND READ THE THREAD LINK BELOW
Valve Adjustment: ENGINE OFF!

with #1 cylinder Intake Valve at full valve lift .... Adjust #6 Intake Valve
with #8 cylinder Intake Valve at full valve lift .... Adjust #5 Intake Valve
with #4 cylinder Intake Valve at full valve lift .... Adjust #7 Intake Valve
with #3 cylinder Intake Valve at full valve lift .... Adjust #2 Intake Valve
with #6 cylinder Intake Valve at full valve lift .... Adjust #1 Intake Valve
with #5 cylinder Intake Valve at full valve lift .... Adjust #8 Intake Valve
with #7 cylinder Intake Valve at full valve lift .... Adjust #4 Intake Valve
with #2 cylinder Intake Valve at full valve lift .... Adjust #3 Intake Valve

Exhaust Valve Adjustment: ENGINE OFF!


If you have noticed, this is the same procedure as the intake valves listed above, just that you are now adjusting the exhaust valves the same way.

with #1 cylinder Exhaust Valve at full valve lift .... Adjust #6 Exhaust Valve
with #8 cylinder Exhaust Valve at full valve lift .... Adjust #5 Exhaust Valve
with #4 cylinder Exhaust Valve at full valve lift .... Adjust #7 Exhaust Valve
with #3 cylinder Exhaust Valve at full valve lift .... Adjust #2 Exhaust Valve
with #6 cylinder Exhaust Valve at full valve lift .... Adjust #1 Exhaust Valve
with #5 cylinder Exhaust Valve at full valve lift .... Adjust #8 Exhaust Valve
with #7 cylinder Exhaust Valve at full valve lift .... Adjust #4 Exhaust Valve
with #2 cylinder Exhaust Valve at full valve lift .... Adjust #3 Exhaust Valve


First turn the engine i
n the normal
direction of rotation. Start with cylinder number one (1). When the exhaust valve begins to
move, adjust the intake valve to zero lash plus an additional ½ turn more. Rotate the engine
over again until the intake valve reaches maximum lift and
is almost all the way back down.
Then set the exhaust valve to zero lash plus ½ turn. Adjust the valves on each cy
linder in this manner until all
valves are adjusted.


ID ALSO POINT OUT THAT,The most commonly accepted method of adjusting the rockers with solid lifters and ensuring the lifter is centered on the cam lobe base circle is the EOIC (engine off) method. For each individual cylinder you adjust the intake rocker when the exhaust valve just starts to open. You adjust the exhaust rocker when the intake valve is fully open and just starts to close.

read this thread
viewtopic.php?f=52&t=196&p=35392&hilit=adjusting+rocker#p35392
 
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