I have a set of 1.6 rockers that are just touching the top of the bolt of the rocker stud , enough to scrape the alum. off . The heads and block are stock the rockers are NSA and i have hardened rods 7.2 and guide plates just cant figure why they are touching ?

 

mine did that too.... but i dunno why, but mine were proforms

 

The GMPP rockers have a short slot limiting lift capacity, or you put the wrong length pushrods in it.

 

Iam not sure the brand name i bought them used , the push rod should be stock length the heads and block havent been touched so that shouldnt be a issue .

 

are they are a full roller?It is a common problem,i just had to clearnace my Crane Gold 1.6 rrs..Do a search and you will find alot of information about it.

 

Yeah full roller i see if i use a apr stud instead of stock it will give me alittle more clearance . So i will order some and hope it fixes my problem

 

I am using Arp studs as well...you still might have to do some light grinding..

 

It is a common problem if you are not capable of basic research and buy the wrong parts.

Some outdated designs are lift limited to below what is common lift these days.

 

I did the research when I built my motor.Its not that uncommon to have to do a little modification when building a engine.

 

Lots of people do research but fail to understand the difference between reading and comprehension. Lots of people think they are buying very good parts when they are buying nothing but junk.

You should not be modifying rockers for a basic hydraulic setup. I have run 4 different sets of rockers on the LT1 and never had to modify a single one that is with 3 different aftermarket cams, one of them being over .600" lift. Also used ARP studs, three different sets of heads, 2 different sets of valvecovers, 3 different sets of guideplates.

The closest thing I had to do to modifying anything with all of that was trimming the stock valvecovers to clear wide body rockers.

 

Stock studs wont work with guide plates and RR..... Ask me how I know.....LOL. The ARP studs have a lower nut to allow the RR to miss it. The new studs "should" solve the problem. Good Luck..

 

Thanks !

 

This may not mean anything, but I have read of some guys mistakenly installing the rocker with the trunion 180* out. Something to check.

 

Good point.

 

That was one of the first things i checked and they where correct