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Old 04-06-2006, 03:51 PM   #1
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Car: 86 Monte Carlo
Engine: Blown 489
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Edelbrock RPM 60899 Head Guide Plates And Pushrods Problem

hey, i think there is 1 on each head, that is a pain in the ***. the guide plate is over so much that the pushrod, when it sits in the lifter, is rubbed against the guide plate and the head so the pushrod cant turn freely.

anyone else run into this problem, and what can i do? if i unbolt the guide plate can i move it over AT ALL? or do i need to shave the guide plate down?

edelbrock should know the little size that is to fit a pushrod in. thanks in advace
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Old 04-06-2006, 06:51 PM   #2
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Silly question, but you're not running self-aligning rockers, are you?
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Old 04-06-2006, 07:04 PM   #3
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they are non-self aligning
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Old 04-06-2006, 09:13 PM   #4
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Try loosening the rocker studs that hold down the guide plate. The plate may move over a little.
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Old 04-06-2006, 09:15 PM   #5
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You could need to clearance the head a little for the 1.6 rockers.
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Old 04-06-2006, 09:55 PM   #6
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the motor turns over with it like that, but at spots its harder then hell.. so im screwed...

ill try loosening the rocker and see.. thanks alot..

apeiron what do you mean by clearancing the head?
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Old 04-06-2006, 10:13 PM   #7
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The contact cup for the pushrod end is closer to the fulcrum on the rocker on a 1.6 than it is on a 1.5. Sometimes the pushrod slots or holes need to be lengthened so the pushrod doesn't bind.

Where are yours binding? On the sides or at the bottom of the slots?
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Old 04-07-2006, 10:41 AM   #8
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they are binding on each side.. against the guide plate and the head.. if it doesnt sit in the lifter properly it will spin freely.. but once it goes into the lifter it's like its stuck.
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Old 04-07-2006, 11:33 AM   #9
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I didn't think you need pushrod guide plates if you heads have slots. Pick one: slots or guideplates or self aligning rockers.
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Old 04-07-2006, 12:15 PM   #10
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the heads came with guideplates, and im using non-self aligning rockers

2 pushrods are being wedged inbetween the head and guide plate when i seat it in the lifter and put the rocker on.
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Old 04-08-2006, 02:50 PM   #11
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Take a large drill and open up the holes where the push rod comes through the head. The heads are slotted to run self aligning pushrods and, as said, your different rocker ratio moves the pushrod to close to the bottom of that slot. Make sure you put rags in the lifter valley to collect the aluminum shavings.....or you could use an aluminum magnet!
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Old 04-08-2006, 03:38 PM   #12
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self aligning pushrods?
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Old 04-08-2006, 04:46 PM   #13
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The edelbrock heads come with guideplates and are intended for use with non-self-aligning rocker arms (which you have... good).. Loosen the rocker arm studs and adjust the guideplate position. One question that might also help, how is the rocker arm to valve step tip contact on the rockers in question?? Off to the side or dead-on center??
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Old 04-08-2006, 04:51 PM   #14
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Doh! I meant self aligning rockers
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Old 04-08-2006, 05:36 PM   #15
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Quote:
Originally Posted by thirdgen88
The edelbrock heads come with guideplates and are intended for use with non-self-aligning rocker arms (which you have... good).. Loosen the rocker arm studs and adjust the guideplate position. One question that might also help, how is the rocker arm to valve step tip contact on the rockers in question?? Off to the side or dead-on center??

on a few of them the rocker goes off the side not in the center.

have yeah these heads guideplates, so i wouldnt be using non-self aligning rockers.
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Old 04-08-2006, 06:50 PM   #16
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This is what the guide plates are for, to align the rr tips in the center of the valve. If loosening the guides doesn't allow them to ride right in the center then you either need to cut them, line then up and then weld them back together (I've done that its time consuming) or buy adjustable guide plates. Either way, you NEED to align the roller through the center of the tip of the valve. If not you'll side load the valve and wipe out the guides in no time. This is where engine building costs money, on the time consuming stuff like this. OR you can buy self aligning rr's and toss the guide plates.
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Old 04-08-2006, 06:50 PM
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