Length differences in 6.0 pushrods, new vs old

Matt Saunoras · June 19, 2013

I'm being told by a fairly reliable source (an engine rebuilder) that OEM 6.0 pushrods and the current part number 8C3Z-6565-B are different lengths, namely the the new pushrod is .050" shorter. I am aware it is also a 6.4 pushrod and the 6.0 number crosses over to the 6.4 number.

I was also told this is a reason for 6.0 lifter failure among other things. OEM 6.0 pushrods are too long and it causes the lifter to bottom out internally.

Does anyone have a new pushrod and an old one they can lay side by side to verify this? Anyone have any input on this? Should we start selling pushrods with headgaskets?

joshbuys · July 4, 2013

I don't have one in front of me to compare now, but I have compared them a few months back when I was replacing some push rods on a unit with broken rockers, I always like to compare old to new....The old ones are definitely longer. I contacted hotline and they said it was an updated push rod and the shorter length wouldn't affect anything since the hydraulic lifter would take up the slack. They didn't give any more explanation than that.