Pushrods
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1st Gear
Joined: Feb 2019
Posts: 5
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From: Boston
Pushrods
Doing cam chest. I got Andrews adjustable pushrods and figured I’d reuse my oem covers. Per jpcycles I can reuse. But some people are saying may not be able to adjust them. Anyone know if I can adjust Andrews rods with oem tubes ?
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Joined: Sep 2010
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One way or another you can. This is what I started doing because it’s actually easier. I bolt the rocker plates in place with the pushrods as short as they will go and no pushrod tubes. I then adjust the pushrods. Next, unbolt the rocker plates, pull out the adjusted pushrods and reinstall it all with the tubes in place.
Road Warrior
Joined: Aug 2008
Posts: 1,306
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From: Sheboygan, WI
One way or another you can. This is what I started doing because it’s actually easier. I bolt the rocker plates in place with the pushrods as short as they will go and no pushrod tubes. I then adjust the pushrods. Next, unbolt the rocker plates, pull out the adjusted pushrods and reinstall it all with the tubes in place.
Club Member
Joined: Sep 2010
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Not at all. The purpose of adjustable pushrods is to properly set the valve lash after making modifications like different cams. Changing cylinders and heads will also require pushrod adjustment.
Some adustable pushrods are designed to allow adjustment with the tubes in place, but that’s not the purpose of pushrod adjustment.
Some adustable pushrods are designed to allow adjustment with the tubes in place, but that’s not the purpose of pushrod adjustment.
Seasoned HDF Member
Joined: Feb 2013
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From: New York
I would call Andrew Products and ask them if the adjustable push rods you purchase can or can't be used with stock push rods covers.
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Joined: Apr 2015
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Not at all. The purpose of adjustable pushrods is to properly set the valve lash after making modifications like different cams. Changing cylinders and heads will also require pushrod adjustment.
Some adustable pushrods are designed to allow adjustment with the tubes in place, but that’s not the purpose of pushrod adjustment.
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Club Member
Joined: Sep 2010
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It’s true that removing the rocker box cover and rocker plate is more work than using pushrods that can be adjusted with the tubes in place for just a cam change. My point is that it can be done.
Last edited by skydude426; Feb 13, 2019 at 05:22 PM.
Road Warrior
Joined: Nov 2007
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From: Houston, Texas
Are you replacing the cams with Andrews? According to their directions they have the same base circle and you can reuse your existing push rods. Yes, you have to remove the valve cover and the rocker arms but for a little extra work, you know they will fit, nothing to adjust ( or miss adjust) and nothing to possibly come loose later.
Someone correct me if I am wrong, but the only reason adjustable push rods are used is as a shortcut to not have to remove the cover and rocker arms? Don't the cam manufacturer's that use a different base circle offer exact fit, non adjustable push rods as well as the adjustable? Isn't the valve lash set by the lifter? You just adjust to get to the middle of the lifter's adjustment,right?
Sorry. I'm not an expert I can clearly read the directions on the Andrews web page that says their base circle is the same and the stock push rods can be used. I have an inexpensive indy that I trust and he reused the stock push rods when he's changed the cams in both my bikes. SE cams in one bike and S&S in the other.
Someone correct me if I am wrong, but the only reason adjustable push rods are used is as a shortcut to not have to remove the cover and rocker arms? Don't the cam manufacturer's that use a different base circle offer exact fit, non adjustable push rods as well as the adjustable? Isn't the valve lash set by the lifter? You just adjust to get to the middle of the lifter's adjustment,right?
Sorry. I'm not an expert I can clearly read the directions on the Andrews web page that says their base circle is the same and the stock push rods can be used. I have an inexpensive indy that I trust and he reused the stock push rods when he's changed the cams in both my bikes. SE cams in one bike and S&S in the other.