Determining Pushrod Length
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Fleet Mechanic
Joined: Mar 2004
Posts: 1,398
Likes: 17
From: Hesperia, CA
Determining Pushrod Length
I just finished putting my D3VE heads back on my engine. I had oversize stainless steel race series valves installed. These valves are approximately .090 longer than the stock valves. I installed the Crane 99672 retainers to bring the springs back down to spec height.
Since I am using Crane Roller Rockers, Crane Springs, and Crane Lifters, I decided to use the Crane procedures for setting the lifter preload. I put Crane shims under the pedestals to get the recommended lifter preload of .020 to .060. I ended up with .060 shims under most of the pedestals and .080 under a couple of the pedestals.
It makes me a little nervous having the pedestals that high on the pedestal mounts. Does anybody out there have any experience with running the rocker arms like this, or would it be a better option to try to find .060 shorter pushrods? Due to time restraints, I would rather not have to take it back apart at this time, but if it is going to be a problem I may have to.
Since I am using Crane Roller Rockers, Crane Springs, and Crane Lifters, I decided to use the Crane procedures for setting the lifter preload. I put Crane shims under the pedestals to get the recommended lifter preload of .020 to .060. I ended up with .060 shims under most of the pedestals and .080 under a couple of the pedestals.
It makes me a little nervous having the pedestals that high on the pedestal mounts. Does anybody out there have any experience with running the rocker arms like this, or would it be a better option to try to find .060 shorter pushrods? Due to time restraints, I would rather not have to take it back apart at this time, but if it is going to be a problem I may have to.
Elder User
Joined: Jul 1999
Posts: 877
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From: Missouri
I put a motor together last spring for a stock pulling truck and had .060 shims under most of the pedestals and didn't have any problems. It has a Lunati cam with over .550 lift and the guy that ownes the truck ran the crap out of it. I don't see you having any problems.
Thread Starter
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Fleet Mechanic
Joined: Mar 2004
Posts: 1,398
Likes: 17
From: Hesperia, CA
Originally Posted by greenhighboy
I put a motor together last spring for a stock pulling truck and had .060 shims under most of the pedestals and didn't have any problems. It has a Lunati cam with over .550 lift and the guy that ownes the truck ran the crap out of it. I don't see you having any problems.
