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Old 08-21-2008, 04:24 PM
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Question re. alignment of guide plates

I just installed the valvetrain on my new (used) heads. I'm using ProForm chromoly 1-piece pushrods and Scorpion full roller rockers. I've already checked pushrod length and I'm perfect on that front. In terms of lateral alignment of the roller tip on each valve stem, I did a quick check and they're all fairly central (not perfect, but close enough). However, I didn't check to see if the pushrods are rubbing against the sides of the guide plates. Should I check for that and adjust the guide plates if that's the case? What is more important; lateral alignment of the roller tip on the valve stem, or making sure the pushrods don't rub against the guide plates?

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Old 08-21-2008, 05:15 PM
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Question re. alignment of guide plates

i like mine centered on top , if it's off to one side , it will wear that way causing a slight lean of push rod rubbing guide and wit eventually jump off .
i've had to grind the opposing side of guide and add , weld ,to other side to get them centered .
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Old 08-21-2008, 06:22 PM
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Some companies make over lapping guide plates. You can adjust them separately but when the studs are tightened down, they lock together. (one pair per cylinder) You need to get the rockers right on the stem tip. The push rods WILL rub in the plates, that is what they are for, to keep the push rod in place AND to keep the rocker on the stem.

Mark
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Old 08-21-2008, 08:05 PM
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Most of them have a "up" side. beyond that the shoulder on the rocker stud will pretty much limit your range of adjustment.
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Old 08-21-2008, 11:12 PM
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On all of the fords I've done I have had to cut the guide plate in 2 pieces, spread them apart enough to get the rocker tips centered over the tip of the valve, then weld them back up.


PITA, but if you don't want a rocker slipping off the tip, hitting the retainer and popping keepers out, that's what I've found you need to do.
I've only had that happen once, but it made me never want it to happen again.


Later, mikey
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