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Wrist pin retainers

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Old May 16, 2013 | 04:58 AM
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Default Wrist pin retainers
Anyone know where i could get some replacement wrist pin retainer locks for factory pistons with the .943 pins? GM, part number? Aftermarket brand? Been searching, can't find anything.
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Old May 17, 2013 | 01:44 PM
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None are available for factory pistons?
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Old May 26, 2013 | 01:27 AM
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Originally Posted by Quick Ranger
None are available for factory pistons?
Does Factory pistons come with floting pistons??? check Wiseco they have the retainers.
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Old May 26, 2013 | 03:42 AM
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Originally Posted by TexasGMC08
Does Factory pistons come with floting pistons??? check Wiseco they have the retainers.
I know several piston manufacturers sell the retainers, for their piston. I'm looking for them for the stock pistons. I figured someone would have a GM part number handy.
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Old May 26, 2013 | 11:32 AM
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you can try this number GM-12569638.... Summit ROS-4004-L
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Old May 27, 2013 | 03:15 PM
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Thanks, that gm number seems to be the one I'm looking for.
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Old May 27, 2013 | 09:56 PM
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Originally Posted by TexasGMC08
Does Factory pistons come with floting pistons??? check Wiseco they have the retainers.
2004 ish GM went with floating pins for all LS engines.
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Old May 28, 2013 | 01:00 AM
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well that will be the right GM number then cause that was the yr the engine diagram show was a 2004 5.7 and it gave that GM part number for retainer. you can get it from gmcheapparts.com for $2.49 I think its what it said..
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Old May 28, 2013 | 01:38 AM
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Just curious. Are you not wanting to re-use the ones that came out?

I'm working on an 06 5.3 and removed the pistons from the rods so I could clean it all up. I was just going to re-use.

That Summit part number is for a Ross Spirolock and I think those require a square groove.

Wild price variations on the GM parts.......

Ron
Last edited by RonSSNova; May 28, 2013 at 01:55 AM.
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Old May 28, 2013 | 04:00 AM
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Originally Posted by RonSSNova
Just curious. Are you not wanting to re-use the ones that came out?

I'm working on an 06 5.3 and removed the pistons from the rods so I could clean it all up. I was just going to re-use.

That Summit part number is for a Ross Spirolock and I think those require a square groove.

Wild price variations on the GM parts.......

Ron
I personally prefer to use a new retainer once i remove the old ones, i've seen used ones come out and let the wrist pin walk out of the piston. I'm sure GM would recommend replacing after removal. I'm removing mine aswell to clean everything up before assembly.
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Old May 28, 2013 | 04:11 AM
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Makes sense. Thanks.

Ron
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