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Piston ring gap orentation

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  #1  
Old 08-04-2024 | 07:19 PM
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Question Piston ring gap orentation

I installed all of the pistons with the gaps in orientation of what I thought the rave was trying to say.



After re reading it, I might have not been correct. It seems to want all the ring gaps on the non-thrust side? It is very confusing.
The photo shows how they are now installed. Is this ok or do I need to take all the pistons out and orient the gaps another way?
 
  #2  
Old 08-05-2024 | 06:47 AM
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EDIT:

I just reread this and will go again. Remove the ? at RH and add "thrust side" at LH. That is where you have "thrust". I'm not sure why they call for LH and RH sides of the piston. I guess engine rotation is their thought. Thrust, though, occurs on both sides. A normally worn bore elongates perpendicular to the wrist pin ( toward the lifter valley and away from the lifter valley). That is due to forces experienced during compression and expansion strokes, plus the normal spinning forces. Anyway, compression rings get oriented with their ends between 90 and 180 deg apart. Oil rings are as they say; about 90deg for the top and bottom, with the spacer end between. Align the ends nearer to the wrist pin and away from the "thrust" areas.

In your drawing, your compression rings would be OK, and your oil rings would need to be rotated about 90deg either direction.
 

Last edited by H20nSnow; 08-05-2024 at 07:07 AM.
  #3  
Old 08-05-2024 | 12:54 PM
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If this image is correct, and my diagram is opposite then the thrust side would be on the right of the piston. Keep note that the top of my diagram is the front of the engine and car.
What changes now? I'm tempted to just leave it as is since everything seems to be at a significant angle from each other and not on any 90 degree orentations.

 
  #4  
Old 08-05-2024 | 02:20 PM
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I remember that diagram! Had a CX500 from 1992-1996.
 
  #5  
Old 08-05-2024 | 11:39 PM
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A lot of the sources I can find have conflicting information making me very confused. What they have is common is they all say that the ring gaps need to be spread out. Since this is how the pistons are assembled in the block now, I will leave it the way it is unless it is known that it will cause problems.
 
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