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Today, 02:00 PM
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#1 |
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Registered User
Join Date: Oct 2016
Location: Dallas Texas
Posts: 3,286
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Do piston rings rotate...
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My guess was wrong according to one of the comments on the video below about an SAE paper he read but almost correct according to the video author. What's your guess? https://www.youtube.com/watch?v=GxEhGBUkzI8 This might be the SAE paper mentioned (excerpt...paywall): https://www.sae.org/publications/tec.../2023-32-0033/ -Kevin
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67 C10 fleet fuel injected '70 402, 700r4, 3.73 posi 07 335 sport turbo 6sp 94 Trans Am GT LT1 6sp posi -- sold after 22yrs 99 540 sport V8 6sp -- sold 73 240z L24 4sp -- given to friend 68 C10 step 350/350 3.73 open -- sold |
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Today, 08:58 PM
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#2 |
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Post Whore
 
Join Date: Feb 2016
Location: Portland Oregon
Posts: 11,551
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Re: Do piston rings rotate...
Yes they do. If they didn't you would see no wear in the area of ring groves where the ring gap never touched the sides of the grove. If you inspect a worn piston you should see even wear on the sides of the ring grove around the entire circumference of the piston.
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Thanks to Bob and Jeanie and everyone else at Superior Performance for all their great help.  RIP Bob Parks. 1967 Burban (the WMB),1988 S10 Blazer (the Stink10 II),1969 GTO (the Goat), 1970 Javelin, 1952 F2 Ford OHC six 4X4, 29 Model A, 72 Firebird (the DBP Bird). 85 Alfa Romeo If it breaks I didn't want it in the first place The WMB repair thread http://67-72chevytrucks.com/vboard/s...d.php?t=698377 |
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Today, 09:42 PM
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#3 |
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Who Changed This?
Join Date: Jan 2013
Location: Simi Valley, CA
Posts: 10,845
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Re: Do piston rings rotate...
All those engines I built, I was so careful to put the rings in their clocked positions.
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~Steven '70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper Simi Valley, CA |
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