69 Z28 full floating rods? - Team Camaro Tech
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post #1 of 5 (permalink) Old Jan 13th, 09, 08:47 AM Thread Starter
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69 Z28 full floating rods?

I searched this topic and did not find anything... Can someone explain what the term "full floating rods" means? And post pics of "full floating rods" and the "pressed pin type." I understand that many rods came with the "O" cast on the cap but that does NOT make them 69 Z28 rods??? How can I look at a set of rods and know if they are the "shot peaned, full floating "O" rods for a 69 Z28?

I'd like to buy a set and I'm want to make sure that I can identify them before I start looking...
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post #2 of 5 (permalink) Old Jan 13th, 09, 09:08 AM
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Jimmy V
 
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Re: 69 Z28 full floating rods?

Pressed Pin rods are exactly that, the pins are press fit into the rod, and require a press to be installed. The press fit is what holds them in place. So the piston/pin/rod is assembled together when the pin is pressed into place. The pin also cannot rotate in the rod because of the press fit.

With full floating rods, the pin will slide right through the rod and can rotate within the rod. Your can put them in and take them out by hand. In order to hold them in place, there are retainer rings installed in the piston at each end of the pin.

Hope this helps some.

Jimmy V.
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post #3 of 5 (permalink) Old Jan 13th, 09, 01:24 PM
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Re: 69 Z28 full floating rods?



Rods are not pressed on, they are heated so the hole expands then quickly installed on the cold wrist pin. The press is involved when you take them apart.

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post #4 of 5 (permalink) Old Jan 13th, 09, 01:51 PM
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Jimmy V
 
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Re: 69 Z28 full floating rods?

Huh, learn something new everyday. I always assumed the were pressed in as well as out.

Jimmy V.
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post #5 of 5 (permalink) Old Jan 13th, 09, 02:19 PM
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Ron
 
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Re: 69 Z28 full floating rods?

If you attempt to press a pin into a rod you can be assured of wrist pin failure. If you attempt to use a torch to heat the end of the rod in order to slide the pin through the piston and rod you will have wrist pin failure and more likely a rod failure. There is a specific "Temperature" which is MFGr'd spec for the rod and a special oven to heat the small rod end to the correct temperature to so that the pin will slide through the piston and rod end by hand and let the assembly cool naturally. It takes a better part of an afternoon to do a complete set. That is why the small end of a pressed rod has a blue tinge to it.

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Last edited by Z15CAM; Jan 13th, 09 at 02:51 PM.
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