Set of ZZ4 pushrods, 3000 miles on them, perfect condition. Make an offer.

 

What is the length on them, stock .100 over , .200 over?

mrtater

 

Measured roller crate motor pushrod lengths, such as these to be about 7.200 inches. The actual measurement was at 7.194.

 

Heres the specs:
GM#:10241740

Material: 1010 steel
Diameter: 5/16"
Length: 7.122"
Usage: Hydraulic roller
Description: (1) Heavy-duty .060" wall, standard length. For use in 2nd design ZZ-series engines without guide plates.

 

THEY ARE GREAT RODS. GOT A SET OF THEM WITH MY ZZ4 CAM - THE BEST. SOMETIMES ALL THAT R&D REALLY WORKS.
sorry - did not see that i was shouting.

 

The set out of a ZZ3 mtr measured 7.194. Maybe the ZZ4's are different pushrods?

Does not quite make sense being as they both use the same cam, unless the ZZ4 uses a different leght lifter, which I doubt. Used a set of harden aftermarket pushrods in my ZZ3 mtr and they measured 7.200.

Assembled a 350 Vortec roller mtr and used shorter lenght Comp push rods at 7.150.

IMO. 7.122 inch for those ZZ4 rods is a typo.

 

The zz-zz3 did have different pushrods. I forget the part number for the older stuff but they were for guide plates. The ZZ4 has self guided rockers which is why they changed them. From what I read both GM products are good. As for the length difference, not sure. Maybe different heads?

Maybe the length is a typo but its off GM's site.

 

This ZZ3 mtr had wider than normal push rod guide plates, along with self aligning rockers.

Always thought that ZZ4's used the same valve gear, (except for valve springs/retainers) set-up.

They both use the 113 Corvette D exh port head.

 

Not really sure on that one. I got my info from crate engine depot and thats just what their site says.