help with adjusting pushrods please
Outstanding HDF Member
Joined: Oct 2007
Posts: 3,437
Likes: 15
I've adjusted small block V8's with solids or hydraulic lifters with the motors running, no problem. Concerning bleeding down the HD lifters. When I shut the motor down, a valve or two will be open. If I adjust the pushrods after the motor has cooled, the open valve will have bleed down the lifter before adjustment. I understand how to adjust the pumped up lifters and wait for them to bleed down before turning the motor to adjust the other pushrods, but what effect does the "bleed down" lifter (when motor was shut down) have on the procedure. It seems like that lifter would have no oil in it while the lifters on closed valves would be full of oil. How does this effect the adjustment procedure? After backing off the pushrod and then removing play, is the resistance the same with the pumped up (full of oil) lifter vs the bleed down unit?
HDF Community Team
Joined: Jun 2006
Posts: 12,774
Likes: 2,606
From: san antonio
Have never understood how such a simple procedure becomes to complicated and mysterious. Pushrods come with instructions, specifically the number of turns required to adjust. Put your finger, or something else over the spark plug hole, rotate rear wheel until whatever you have over the hole gets blow out and you know you are on the compressio stroke but at the bottom, place a plastic straw in the spark plug hole and rotate rear wheel until you find TDC. The piston doesn't have to be dead nuts on at TDC, can be a little before or a little after as the lifter will still be on the heel of the cam. Take up and down movement out of pushrod and then adjust the specified number of turns and lock. Let bleed down and move to the other cylinder.
For newbies, adjust pushrods before the cam cover goes back on an, with light, you can see the lifter sitting on the heel of the cam. It's not that hard.
For newbies, adjust pushrods before the cam cover goes back on an, with light, you can see the lifter sitting on the heel of the cam. It's not that hard.
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Road Warrior
Joined: Feb 2007
Posts: 1,730
Likes: 199
From: Vancouver BC
Have never understood how such a simple procedure becomes to complicated and mysterious. Pushrods come with instructions, specifically the number of turns required to adjust. Put your finger, or something else over the spark plug hole, rotate rear wheel until whatever you have over the hole gets blow out and you know you are on the compressio stroke but at the bottom, place a plastic straw in the spark plug hole and rotate rear wheel until you find TDC. The piston doesn't have to be dead nuts on at TDC, can be a little before or a little after as the lifter will still be on the heel of the cam. Take up and down movement out of pushrod and then adjust the specified number of turns and lock. Let bleed down and move to the other cylinder.
For newbies, adjust pushrods before the cam cover goes back on an, with light, you can see the lifter sitting on the heel of the cam. It's not that hard.
For newbies, adjust pushrods before the cam cover goes back on an, with light, you can see the lifter sitting on the heel of the cam. It's not that hard.
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