RT6PK
Well-Known Member
I have a 318 that I purchased from a member here with only a few thousand miles on it. There was a slight ticking sound from the valve train when I bought it. I installed a new stock 340 cam and lifters. The ticking sound is still there.
There is some slop between the intake rocker and push rod on the #2 cylinder. I do not see any uneven wear on that rocker, rocker shaft, or pushrod. I swapped that rocker and pushrod with the one from the #4 cylinder; and reinstalled the rocker assembly. I am aware of the offset to the rockers and made sure that I swapped a rocker with the correct offset. The slop is still there in the intake rocker on #2. That tells me that the issue is either with the lifter, cam, or possibly that valve and NOT the rocker or pushrod??? I pulled the lifter out, and it looks brand new. Just for fun, I bought a new lifter and will install it tonight.
My big question is, if the new lifter does not fix my problem, can I just install a slightly longer pushrod to take up the slop and stop the ticking? And if so, how do I determine that length pushrod to go with? Is it as simple as measuring the gap between the rocker and valve stem and adding that dimension to the length of my existing pushrod to calculate the length of a replacement pushrod?
There is some slop between the intake rocker and push rod on the #2 cylinder. I do not see any uneven wear on that rocker, rocker shaft, or pushrod. I swapped that rocker and pushrod with the one from the #4 cylinder; and reinstalled the rocker assembly. I am aware of the offset to the rockers and made sure that I swapped a rocker with the correct offset. The slop is still there in the intake rocker on #2. That tells me that the issue is either with the lifter, cam, or possibly that valve and NOT the rocker or pushrod??? I pulled the lifter out, and it looks brand new. Just for fun, I bought a new lifter and will install it tonight.
My big question is, if the new lifter does not fix my problem, can I just install a slightly longer pushrod to take up the slop and stop the ticking? And if so, how do I determine that length pushrod to go with? Is it as simple as measuring the gap between the rocker and valve stem and adding that dimension to the length of my existing pushrod to calculate the length of a replacement pushrod?