How do you install a pushrod on a Harley Davidson?
Insert the pushrod into the pushrod tube then insert the top portion of the pushrod up into the rocker box and feel for when it is seated in the rocker arm. Swing the bottom portion of the pushrod into position and just set the threaded end into the opening of the base.
Where are the intake rods on a pushrod?
Again, make sure the exposed threads on the pushrods are clean and dry (no oil or solvent present) and make sure you install the exhaust rods in the exhaust position and the intake rods in the intake position. They are marked.
How can I increase the length of my pushrod?
Now you can adjust the upper portion. Loosen the upper jam nut and unscrew the tube from the base assembly which in effect makes the pushrod get longer. Adjust it up until the top is snug in the rocker and the bottom is snug in the lifter but without any pre-load.
Where does the lifter go on a pushrod?
4. Make sure the lifter is riding on the base circle of the cam (the lowest point on the lobe) before beginning installation of the pushrod.
What’s the difference between adjustable and non adjustable pushrods?
On top of that, adjustable pushrods cost more than non-adjustables, and they require a pricey collapsible pushrod tube kit (if the bike didn’t come from the factory already equipped) to facilitate adjustment. More connections in the pushrod tubes creates more opportunity for leaks, too.
Can a short pushrod cause excessive valvetrain noise?
So as you can see, there are a whole bunch of common practices that can change your needed pushrod length. If you’ve done any of these things, pushrod length is something you need to pay attention to. Pushrods that are too short for the application will cause excessive valvetrain noise and wear.
Can you change the length of a stock pushrod?
If your motor is all stock, the answer is no. Your stock pushrods are designed to be within the acceptable length range even in the worst case tolerance stack-up situation. Changing the height of the cylinder head changes height of the rocker arm relative to the cam, and therefore it needs to be factored into the needed pushrod length.
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.
How to install a H-D Twin Cam camshaft?
Align timing marks and torque retaining bolts in the correct sequence as listed in manual. Install push rods adjust to the shortest length rocker arm end first. Rotate motor so pushrod is on the base circle and adjust pushrod to zero lash. Adjust pushrod per manufacturer’s specs and tighten jam nut (generally 2.5-4 turns depending on thread pitch).
4. Make sure the lifter is riding on the base circle of the cam (the lowest point on the lobe) before beginning installation of the pushrod.
Insert the pushrod into the pushrod tube then insert the top portion of the pushrod up into the rocker box and feel for when it is seated in the rocker arm. Swing the bottom portion of the pushrod into position and just set the threaded end into the opening of the base.
Now you can adjust the upper portion. Loosen the upper jam nut and unscrew the tube from the base assembly which in effect makes the pushrod get longer. Adjust it up until the top is snug in the rocker and the bottom is snug in the lifter but without any pre-load.
Align timing marks and torque retaining bolts in the correct sequence as listed in manual. Install push rods adjust to the shortest length rocker arm end first. Rotate motor so pushrod is on the base circle and adjust pushrod to zero lash. Adjust pushrod per manufacturer’s specs and tighten jam nut (generally 2.5-4 turns depending on thread pitch).