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77k mile 2010 LS3; refresh bottom end?

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Old Jan 30, 2026 | 08:15 PM
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Default 77k mile 2010 LS3; refresh bottom end?

I have a LS3 out of a 2010 Camaro with 77k miles that's going into my RX8. The car will be a "daily" and backroads ripper only; no track time. I only plan on putting in a TSP Stage 1 cam (maybe stage 2), no boost or nitrous. Here's what I know about the engine:
-Oil changes every 4-5k miles.
-Cold oil pressure 45-50-ish? psi at idle.
-Cold leakdown 5-7% across all cylinders.
-No engine noise.

Due to engine's age, new cam, a few "while you're in there", and engine swap, I'm going to have it mostly apart and was thinking I should pull heads, pistons, and crank to inspect bearings. While I have all that out and if everything looks good should I get new rings and dingleberry it? Clean ring lands and reassemble with current rings? Don't dick with it?

The LS1 in my WS6 has 140k? miles and the most its ever been torn down is for valve seals and LS6 valley cover. I won't be able to start tearing into the LS3 for a few weeks.
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Old Jan 30, 2026 | 09:17 PM
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At 77k actual miles and regular maintenance , I wouldn’t touch it. You’ll know all you need to know when you change oil pans…should be super clean inside. Good find!
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Old Jan 30, 2026 | 09:17 PM
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77K?? Hardly broke in. Leave it alone and SEND IT!!
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Old Jan 30, 2026 | 09:22 PM
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Originally Posted by _JB_
I have a LS3 out of a 2010 Camaro with 77k miles that's going into my RX8. The car will be a "daily" and backroads ripper only; no track time. I only plan on putting in a TSP Stage 1 cam (maybe stage 2), no boost or nitrous. Here's what I know about the engine:
-Oil changes every 4-5k miles.
-Cold oil pressure 45-50-ish? psi at idle.
-Cold leakdown 5-7% across all cylinders.
-No engine noise.

Due to engine's age, new cam, a few "while you're in there", and engine swap, I'm going to have it mostly apart and was thinking I should pull heads, pistons, and crank to inspect bearings. While I have all that out and if everything looks good should I get new rings and dingleberry it? Clean ring lands and reassemble with current rings? Don't dick with it?

The LS1 in my WS6 has 140k? miles and the most its ever been torn down is for valve seals and LS6 valley cover. I won't be able to start tearing into the LS3 for a few weeks.
If you're gonna be having fun on back roads, the only thing I'd do to the bottom end is this:

https://www.improvedracing.com/camar...le-bundle.html
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Old Jan 30, 2026 | 09:54 PM
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Originally Posted by Che70velle
At 77k actual miles and regular maintenance , I wouldn’t touch it. You’ll know all you need to know when you change oil pans…should be super clean inside. Good find!
Hopefully I don't find anything glittery in there, the oil looked fine. Thanks for the advice!

Originally Posted by G Atsma
77K?? Hardly broke in. Leave it alone and SEND IT!!
Appreciate it!

Originally Posted by Keith
If you're gonna be having fun on back roads, the only thing I'd do to the bottom end is this:

https://www.improvedracing.com/camar...le-bundle.html
UPS delivered their baffle, windage, and crank scraper today! I had to get 98-02 fbody oil pan due to the RX8 swap kit I'm using (V8Roadsters). I also ordered an oil cooler adapter from Improved Racing so I can use the stock oil coolers. I have a high pressure Melling oil pump on the way too. Appreciate the suggestion!
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Old Jan 31, 2026 | 07:50 AM
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Stock oil pressure is fine......
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