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What is the piston ring end gap?

Tiny
HD1200
  • MEMBER
  • 2003 CHEVROLET SILVERADO
  • 5.3L
  • V8
  • 4WD
  • AUTOMATIC
  • 2,560,000 MILES
I’m rebuilding a 5.3 Ls Chevy engine and I’m ready to install piston rings. I bought a set from Summit Racing part number CR8794. On the summit site in description, it says no file to fit. My question is, I have a stock engine how to figure out what my end gap should be for stock application? Or does no file fit mean I can just install rings? I’m using Hypereutectic pistons. I’ve read somewhere these need a bigger ring gap. What end cap be for the 3 ring for these pistons?

Thanks for any help on this topic.
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Monday, February 5th, 2024 AT 7:27 AM

6 Replies

Tiny
HD1200
  • MEMBER
  • 61 POSTS
I found this on summit would this be a good chart to follow for hypereutectic piston ring end gap.
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Monday, February 5th, 2024 AT 9:41 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
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Yep, that is the chart we used as well. Please check out this video we did on this topic:

https://youtu.be/KN_63fJrgkY?si=Kyfy_c9IAkJZRZZF

Let us know if you need anything else.

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Monday, February 5th, 2024 AT 11:51 AM
Tiny
HD1200
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Okay, I did the math for top.
Ring for Hypereutectic piston.0065 x 3.78 =.02475 should I use.024 or round up to.025?
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Monday, February 5th, 2024 AT 12:52 PM
Tiny
KEN L
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If you are going to running it hard I would go with the.025 end gap.
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Tuesday, February 6th, 2024 AT 9:36 AM
Tiny
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Okay, thanks a bunch.
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Tuesday, February 6th, 2024 AT 9:45 AM
Tiny
KEN L
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You are welcome, please use 2CarPros anytime we are here to help.
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Tuesday, February 6th, 2024 AT 10:55 AM

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