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Old 04-29-2013, 10:25 AM
Dougie Dougie is offline
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Quote:
Originally Posted by richard stewart 3rd View Post
Hi
The lifter must be on the heal of the lobe to get an accurate adjustment, to accomplish this you split the firing order, 1843 6572 now with #1 Int, at full lift, #6 Int. lifter is on the heal of the lobe ready for adjustment.Loosen the adjuster nut until you can move the push rod up & down, then tighten the nut until it wont go up & down anymore then a half turn more on the nut.
Best of all to you.
Rich

#1 cylinder Intake Valve at full valve lift .... Adjust #6 Intake Valve
#8 cylinder Intake Valve at full valve lift .... Adjust #5 Intake Valve
#4 cylinder Intake Valve at full valve lift .... Adjust #7 Intake Valve
#3 cylinder Intake Valve at full valve lift .... Adjust #2 Intake Valve
#6 cylinder Intake Valve at full valve lift .... Adjust #1 Intake Valve
#5 cylinder Intake Valve at full valve lift .... Adjust #8 Intake Valve
#7 cylinder Intake Valve at full valve lift .... Adjust #4 Intake Valve
#2 cylinder Intake Valve at full valve lift .... Adjust #3 Intake Valve
now the exhaust
#1 cylinder Exhaust Valve at full valve lift .... Adjust #6 Exhaust Valve
#8 cylinder Exhaust Valve at full valve lift .... Adjust #5 Exhaust Valve
#4 cylinder Exhaust Valve at full valve lift .... Adjust #7 Exhaust Valve
#3 cylinder Exhaust Valve at full valve lift .... Adjust #2 Exhaust Valve
#6 cylinder Exhaust Valve at full valve lift .... Adjust #1 Exhaust Valve
#5 cylinder Exhaust Valve at full valve lift .... Adjust #8 Exhaust Valve
#7 cylinder Exhaust Valve at full valve lift .... Adjust #4 Exhaust Valve
#2 cylinder Exhaust Valve at full valve lift .... Adjust #3 Exhaust Valve
I've been reading a lot about this, and seen many opinions. I understand the above procedure should be very accurate. What I don't understand is why adjusting both valves when the piston is at TDC is less accurate. If the piston is at TDC, doesn't that mean that both valves are fully closed and the lifters are both on the bottom of the lobe, or is there some built in variance that would place the lifters on the ramp of the lobe leading to an inaccurate adjustment?

I also recall reading that my Comp cam has 4 degrees of advance built into it, so if that's true wouldn't that mean you could go 4 degrees BTDC and both intake and exhaust would be on the bottom of the lobe. Maybe I'm thinking too much here.
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