Author Topic: 69 z28 rods  (Read 16082 times)

Jerry@CHP

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Re: 69 z28 rods
« Reply #45 on: November 26, 2007, 12:24:42 AM »
The bumped rods that John showed us here are the early 11/32 rods.  All of the 3/8 rods have the beefed up material in that area. 

I am writing another article for CRG called "The Z28 Camaro, A Racer's Perspective."  A lot of the artilce will go into great depth on the engine assemblies, what was good and what was not good.  Most if it is written in rough draft now and I will finish this project as soon as I can get the revised 4th edition 1969 Camaro book text to the printer.

Jerry

fireZ

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Re: 69 z28 rods
« Reply #46 on: November 26, 2007, 12:38:38 AM »
Thanks Jerry looking forward to the article.I have a set of 11/16 with the O on the rod cap,is that normal?
1968 Z28 LA Built
LIC # RPO Z28

Jerry@CHP

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Re: 69 z28 rods
« Reply #47 on: November 26, 2007, 12:45:34 AM »
11/16 or do you mean 11/32??  These are to small journal rods........last used in 1967.

Jerry

fireZ

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Re: 69 z28 rods
« Reply #48 on: November 26, 2007, 01:55:59 AM »
I mean 11/32
1968 Z28 LA Built
LIC # RPO Z28

Jerry@CHP

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Re: 69 z28 rods
« Reply #49 on: November 26, 2007, 01:25:26 PM »
I would say that's normal.  The smaller rods are not that great though, even if you have the versions with the beefed up areas near the rod bolt.  The "O" stamping on the cap is not consistant.

For a resto piece the 11/32 rods are okay.  But, if you're building a '67 302 that you will wind it up now and then, I would recommend the Manley rods.

Jerry

L78 steve

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Re: 69 z28 rods
« Reply #50 on: November 26, 2007, 07:47:13 PM »
Pressed pins are fine but if there not fit properly they too can wander out.
69 Z/28 Dover White X33,ZL2,PS,M20,Std.int.04C
67 SS/RS Mt. Green 1W,2LGSR,3SL,4K,5BY,07C
70 Nova L78 Blk. Cherry,Sandalwood,M21,02B

fireZ

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Re: 69 z28 rods
« Reply #51 on: November 26, 2007, 10:04:08 PM »
Anyone have the part # for the GM rods Jerry recommends?
1968 Z28 LA Built
LIC # RPO Z28

JohnZ

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Re: 69 z28 rods
« Reply #52 on: November 27, 2007, 06:59:28 PM »
Pressed pins are fine but if there not fit properly they too can wander out.

They'd have to be done by Bubba - I've been building engines for 40 years, and during 38 years in Manufacturing with GM and Chrysler, I've never seen one single warranty claim where a pressed pin moved and gouged a cylinder wall.
'69 Z/28
Fathom Green
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L78 steve

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Re: 69 z28 rods
« Reply #53 on: November 29, 2007, 05:00:06 AM »


They'd have to be done by Bubba - I've been building engines for 40 years, and during 38 years in Manufacturing with GM and Chrysler, I've never seen one single warranty claim where a pressed pin moved and gouged a cylinder wall.
[/quote]  I have.I've used C-clips since the 70s with zero failures, As long as they are positioned correctly and not over stressed during install.
69 Z/28 Dover White X33,ZL2,PS,M20,Std.int.04C
67 SS/RS Mt. Green 1W,2LGSR,3SL,4K,5BY,07C
70 Nova L78 Blk. Cherry,Sandalwood,M21,02B