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06-17-2025, 10:56 PM
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#1 |
 Drives: 2014 SS Camaro Join Date: Jun 2025
Location: Canada
Posts: 9
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2014 SS ls3 broken piston
Any buddy ever break a piston in your ls3 ? Motor is stock no mods
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06-18-2025, 05:39 PM
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#2 | |
        
Drives: ABM SS2/RS M6 Join Date: Apr 2011
Location: Lafayette,LA
Posts: 2,322
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Quote:
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 Life is short, drive it like you stole it!  |
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06-18-2025, 07:50 PM
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#3 |
Drives: 2012 Camaro 2SS/RS Vert LS3/M6 Join Date: Aug 2021
Location: Cheboygan, Michigan
Posts: 918
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To answer your question, no its not common. Pistol failure is sometimes a bad tune or lack of fuel and the piston ring heats and expands in to the ring groove and the pistol breaks. Not a common failure on a stock LS3
Or if youre out of oil or low oil pressure of course, that would be a cause as well |
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06-18-2025, 09:17 PM
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#4 |
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Drives: 2014 SS Camaro Join Date: Jun 2025
Location: Canada
Posts: 9
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It was not my car at the time it happened , but from what I was told it was running fine, shut it off started it and it happened. After I wrote this I was in the engine section on this forum and seen an engine build and it sounded like the same thing happened to him, right on start up. I’m not sure if an injector gets partially plugged, or is there anything to the steam ports not on all for corners and a cylinder getting hot and detonating ? Thx in advance
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06-19-2025, 05:35 AM
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#5 |
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waiting at the tree
Drives: SIM 2010 2SS/RS A6 Join Date: Apr 2013
Location: Niagara Falls
Posts: 4,540
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Over rev and the valves could hit the piston.
The valve springs go soft eventually from heat and use.
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2010 2SS/RS A6 Just a few bolt-ons and appearance doo dads
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06-19-2025, 07:51 AM
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#6 |
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Fast Cars and Old Guitars
Drives: 2015 2SS RS (L99, baby!) Join Date: Apr 2012
Location: N. CA
Posts: 4,265
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Piston or rod? The powdered metal rods aren't exactly bulletproof but still a pretty rare break in a stock motor.
__________________
“I don’t want to belong to any club that would have me as a member.” - Groucho Marx
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06-19-2025, 10:22 PM
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#7 | |
 Drives: 2010 Chevy Camaro 2SS manual coupe Join Date: Dec 2023
Location: Sacramento, Ca
Posts: 84
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Quote:
What top end or bottom end parts tend to fail first? And apart from a bad tune, could oil pump/pressure issues cause certain parts to "grenade" in such a fashion? |
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06-20-2025, 08:10 AM
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#8 |
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waiting at the tree
Drives: SIM 2010 2SS/RS A6 Join Date: Apr 2013
Location: Niagara Falls
Posts: 4,540
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The limit depends on a multitude of factors.
Tune,fuel quality,boost pressure if you go FI. If everything is perfect Heads and cam 550HP Supercharger/Turbo 575 or so(6/8 pounds of boost) Nitrous 150 shot
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2010 2SS/RS A6 Just a few bolt-ons and appearance doo dads
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06-20-2025, 08:05 PM
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#9 |
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Drives: 2014 SS Camaro Join Date: Jun 2025
Location: Canada
Posts: 9
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I will pull this one out and take it apart this weekend and see what all is damaged , hen test springs etc. see if I can figure why it ate itself. Thanks for the feedback back
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06-23-2025, 11:05 PM
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#10 |
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Drives: 2014 SS Camaro Join Date: Jun 2025
Location: Canada
Posts: 9
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All pulled apart one piston completely broken off the rod and broken up in the pan, with the rod bent and valve way up in the head. It appears it dropped valve seat and everything went south from there. So could have been a lot worse, so hurt the head pretty good, some marks in the cylinder. So I will have to sleeve one cylinder, and a rod and a piston need replacing, one bent pushrods. I will change out all the lifters, oil pump, gaskets, timing chain and tensioner. Cam looks good.
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