ok i'm installing edelbrock rpm heads. a comp 268 cam, edelbrock push rods, and crane roller rocker arms. when i adjust the guideplates which needs to be done to keep the push rod from contacting the head the rocker arm is thrown way off alignment. you can tell by the picture that the roller tip doesn't fully ride even close to the center of the valve tip. if i adjust the guideplate the push rod contacts the head. if any one has any help or has ever run into this please let me know. thanks for any help or comments.

 

are those self aligning roller rockers?

 

yes they are aligned by the pushrods

 

looks like you need adjustable guideplates and have to open up the pushrod holes a little bit, this is why I always mock up motors with no head gaskets so in case you already torqued them down you're not wasting a set of head gaskets when you pull the heads to open up those holes.

 

the guideplates are adjustable. (the rocker stud hole is larger than the stud to allow for adjustment) and i really don't think i can remove anymore material from the head because the intake runners are already wide. the walls are already thin. from the picture i would say the rocker arm would fail if i ran the motor like this because all the load would be on one side of the roller tip stressing the roller on one side. this if my first time with roller rocker arms or any stud mount rocker arms. has anyone ever had any kind of issue similar to this

 

adjustable guideplates allow you to move the "Width" of the pushrod spacing in or out to allow the rockers to line up properly on the valves. You have standard guideplates which can be moved slightly to line up the rocker arms. Go to summit or jegs and look at the pics of the adjustable ones so you can change the width.

 

i'm sorry i meant the rocker arms are not self aligning. i just don't see how the rocker arm can be off by so much

 

the guideplates have holes larger than the stud so i can loosen the stud and move the plate in any circular motion. i just can't seem to get the rocker arms lined up and the push rod from hitting the head.

 

adjustable guideplates will allow you to move the pushrods inward more, not a circular motion. The distance between pushrods can be changed not just move around a little on the studs. You have standard guideplates not adjustable ones , all standard guideplates can be moved slightly, but adjustable moves the pushrod separationg. You're not following what I'm saying....moving both pushrods inward or closer together will move the rocker arms on the valve inwards and allow them to stay centered.

 

ok thanks for the help. i see what you're saying i just don't understand why edelbrock did'nt machine the heads right. and why i'm needing to do all this for a head that was supposed to be complete. i guess i'll call and see about getting some adjustable guideplates. thanks again for all the help. i was at the point of frustration where i wanted to give up. i went and took a break and now i'm cooled down and ready for another day tomorrow. help is appreciated

 

ISK-200-AGP $51.69

from summitracing.com

it depends what size pushrods you're running those are for 5/16" pushrods not 3/8"

 

Couple of possibilities.
1. Wrong pushrod guide plates. Not for a SBC (Chrysler?.Ford? or...???)
1.(b) Edelbrock stamped on the wrong side of the guide plates. Flip 'em over and see if the fit is better.
2. You did install the head aligning dowels on the block deck, right? If not, the head could be mislocated on the block. remove the heads and look.
3. Offset pushrod seat on the rocker arm. remove and look.
4. Crappy rocker stud hole location.
5. crappy pushrod thru hole location.
6. Offset push rod seat in lifter (roller lifter)