How does the rocker arm affect the pushrod length?
Since this raises or lowers the rocker arm relative to the cam, it needs to be factored into the pushrod length. Anything that changes valve stem protrusion also affects the needed pushrod length.
What’s the best way to adjust a pushrod?
Adjust the pushrods Bring pushrods to Zero lash, no up and down movement, tight against rocker arm, and tight against tappet/lifter. Mark the pushrod with a marker or paint stick. Extend the pushrod (4) four full turns or 24 flats (if using S&S Pushrods, S&S pushrods have a 32 Threads per inch)
How do you replace a bent pushrod on a valve?
Inspect the visible portion of the valve shaft to ensure that they are straight and not excessively worn down. Install a new pushrod in place of the bent one and reinstall the other pushrods by placing them through the cylinder head by hand, making sure that they all seat in the valve lifter.
How can I tell if my pushrod is bent?
Wiggle all of the pushrods to determine which rod or rods are bent and mark the rod with a yellow wax marker. Remove the rocker arm by removing the rocker arm nut over the bent pushrod — if the vehicle is equipped with individual rocker arms.
Since this raises or lowers the rocker arm relative to the cam, it needs to be factored into the pushrod length. Anything that changes valve stem protrusion also affects the needed pushrod length.
Adjust the pushrods Bring pushrods to Zero lash, no up and down movement, tight against rocker arm, and tight against tappet/lifter. Mark the pushrod with a marker or paint stick. Extend the pushrod (4) four full turns or 24 flats (if using S&S Pushrods, S&S pushrods have a 32 Threads per inch)
Can you spin a pushrod with your fingers?
When the adjustment is correct, you will again be able to spin the pushrod with your fingers. The pushrod must spin freely. with NO up and down movement. From this point you want to shorten one full turn, 6 flats. Lock down the pushrod and repeat for the rear cylinder. DO NOT TRY TO MAKE SHORTCUTS IN THIS PROCESS.
What happens when you shorten the pushrod?
While shortening, you will feel the valve spring release the pressure on the pushrod. When the adjustment is correct, you will again be able to spin the pushrod with your fingers. The pushrod must spin freely. with NO up and down movement. From this point you want to shorten one full turn, 6 flats.