The Lifters!!!!!Dam
- Thread starter Guero
- Start date
t i rant!!!!!!!!!!!!!1
i soaked mine overnight in the lightest wieght oil i could find at walmart. then used the little tool that goes down the dist hole and spins the oil pump to prime the motor.
Guero said:
What size pushrods did you use?? With trickflow heads you're usually going to end up with around a 6.7". The adj pushrod checker is all trial and error. From my understanding, you want the contact patch on the valve tip centered and the patch can't be more than .080".
As far as lifter preload (setting the rockers) just follow the instructions.
Priming the oil pump like Urban suggested is a very good idea but not necessary on a used engine, its mandatory for a new engine though!
R.J.
Member
Preload:
With the piston at TDC with both valves in the closed position, do the following:
The first thing you want to do is verify zero valve lash. The best way to do this is to wiggle the push rod up & down as you tighten the rocker arm nut. At the point where the push rod no longer moves up & down, That is zero lash. You now have a starting point for verifying “true” zero lash & the lifter pre-load.
When you adjust the valves you are setting the lifter pre-load, Pre-load is the amount of distance the push rod seat (or “cup”) moves away from the retaining clip.
To set true zero lash & the lifter pre-load, We are going to follow the “EO / IC” procedure.
What is “EO / IC?
EO, is Exhaust Opening; IC, is Intake Closing.
We have the piston at TDC (Both valves are in the closed position), Rotate the engine in the normal direction of rotation (clockwise, if you are facing the front of the engine).
You will see the exhaust valve just starting to open, stop rotating the engine & back off the intake rocker arm.(You are going to back off the rocker arm & re-verify for true zero lash, As you are now positively on the base circle of the camshaft whereas the previous lash adjustment was just a pretty close ballpark guess.) You will once again wiggle the push rod up & down as you tighten the rocker arm nut. When all up & down movement is gone, tighten the rocker arm nut ½ turn, tighten the hex head set screw until it bottoms out on the rocker stud, tighten the rocker arm nut ¼ additional turn. You have now set the lifter pre-load at .045”.
Rotate the engine, You will see the exhaust valve fully open & then close. Watching the intake valve that you just set, You will see it open, You want to keep rotating the engine until it fully opens & then starts to close. When it is almost closed, stop rotating the engine. Set the exhaust valve the same way you did the intake valve.
Move onto the next cylinder in the firing order…
With the piston at TDC with both valves in the closed position, do the following:
The first thing you want to do is verify zero valve lash. The best way to do this is to wiggle the push rod up & down as you tighten the rocker arm nut. At the point where the push rod no longer moves up & down, That is zero lash. You now have a starting point for verifying “true” zero lash & the lifter pre-load.
When you adjust the valves you are setting the lifter pre-load, Pre-load is the amount of distance the push rod seat (or “cup”) moves away from the retaining clip.
To set true zero lash & the lifter pre-load, We are going to follow the “EO / IC” procedure.
What is “EO / IC?
EO, is Exhaust Opening; IC, is Intake Closing.
We have the piston at TDC (Both valves are in the closed position), Rotate the engine in the normal direction of rotation (clockwise, if you are facing the front of the engine).
You will see the exhaust valve just starting to open, stop rotating the engine & back off the intake rocker arm.(You are going to back off the rocker arm & re-verify for true zero lash, As you are now positively on the base circle of the camshaft whereas the previous lash adjustment was just a pretty close ballpark guess.) You will once again wiggle the push rod up & down as you tighten the rocker arm nut. When all up & down movement is gone, tighten the rocker arm nut ½ turn, tighten the hex head set screw until it bottoms out on the rocker stud, tighten the rocker arm nut ¼ additional turn. You have now set the lifter pre-load at .045”.
Rotate the engine, You will see the exhaust valve fully open & then close. Watching the intake valve that you just set, You will see it open, You want to keep rotating the engine until it fully opens & then starts to close. When it is almost closed, stop rotating the engine. Set the exhaust valve the same way you did the intake valve.
Move onto the next cylinder in the firing order…
no i think what he means is that the pushrod should be in the center of the lifter and rocker. you know how they have that little "cup" area for the pushrod to sit in. oil actually travels up through that and keeps things lubedGuero said:
R.J.
Member
Guero: You can follow the dizzy or just know the firing order and as you turn the crank, look for the next one to start moving.
Similar threads
