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Chevy 5/8 7/16 rockers.... what's the difference??
Posted: Sat Mar 29, 2014 7:40 pm
by Jono FD3
Like the title says guys what is the difference between the 5/8 and the 7/16 rockers?? Is it just the collars on the Polly lockers or is it the threads on the rocker studs??? Just want to find out so I don't get the wrong bits for my cast camel hump heads!!
Cheers
Jono
Posted: Sat Mar 29, 2014 10:02 pm
by kiwicar
hi
the 5/8 are substantially stiffer, they are also an aftermarket item on a small block chevy, not a stock camel hump head item. . . You will also find that apart from on 302 chevy heads, bow tie heads, and a very few other "special" factory engines the 7/16 screw in items are also aftermarket. . . normal fitment are push in 7/16 I would have a check as to what you have first.
best regards
Mike
Posted: Sat Mar 29, 2014 10:40 pm
by Jono FD3
Ok so it's the thread size then yea??? Basically I've found a set of 7/16 full roller rockers up for sale and was wanting to see if they would fit my heads or if I would need different studs in the head??
Jono
Posted: Sun Mar 30, 2014 5:52 am
by kiwicar
Hi
unless someone has installed 5/8 studs then they will fit, they are most probably 7/16 screw in studs if the heads have been ported at some stage.
best regards
Mike
Posted: Sun Mar 30, 2014 9:13 am
by Jono FD3
Ok so it's the thread size then yea??? Basically I've found a set of 7/16 full roller rockers up for sale and was wanting to see if they would fit my heads or if I would need different studs in the head??
Jono