why does my piston ring look like this?
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why does my piston ring look like this?
in addition to a slightly bent valve, i think this has something to do with my 4th cylinder burning oil. this is the 2nd ring out of that cylinder. the top ring and oil control rings were fine, but this one has a weird spot that looks like it didnt seal.
its the dark spot on the top left. whats going on there?
on the bottom of the ring it appears as a shiny spot
here is a pic of the 2nd ring that came out of the same cylinder when i took it apart after having ptw contact in the 3rd cylinder on the dyno last spring. notice its even.
ok, so whats the word? can i contribute oil on my piston to that ring? it was installed properly on the piston with the scraper side down, ring gap was .026 on 84.5mm bore. id like to figure it out so i can correct whatever happened
its the dark spot on the top left. whats going on there?
on the bottom of the ring it appears as a shiny spot
here is a pic of the 2nd ring that came out of the same cylinder when i took it apart after having ptw contact in the 3rd cylinder on the dyno last spring. notice its even.
ok, so whats the word? can i contribute oil on my piston to that ring? it was installed properly on the piston with the scraper side down, ring gap was .026 on 84.5mm bore. id like to figure it out so i can correct whatever happened
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Re: why does my piston ring look like this?
Is the ring flat? I'd hazard a guess that either the is bent where the spot is, or the piston was causing the abnormal wear.
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Re: why does my piston ring look like this?
top ring had its gap in line with the left exhaust valve, this 2nd ring had its gap by the left intake valve, 90 degrees from the top ring gap. the oil ring gap was 180 degrees from the 2nd ring gap, so near the right exhaust valve. i think it was the helms specs.
could it have been something in the tune or seemingly more likely a physical thing like bent ring
could it have been something in the tune or seemingly more likely a physical thing like bent ring
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#8
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Re: why does my piston ring look like this?
Now me and the mad scientist gotta rip apart the block to replace the piston rings you fried!
#10
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Re: why does my piston ring look like this?
I don't understand why people clock rings. Do they honestly stay in place of where you leave them?
I was unaware there was an index on the ring lands of the piston to prevent them from moving around.
I was unaware there was an index on the ring lands of the piston to prevent them from moving around.
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Re: why does my piston ring look like this?
i generally follow the gap multipliers provided by the manufacturer, and place the gaps according to the helms. no gaps are ever on a thrust surface, closer than 90 degrees to one another or the top ring gap on the intake side.
i wonder if i tweaked the ring a little filing it down. i always file one side (usually the side of the gap that isnt marked with n50 or the "up" marker) so that i have at least 1 perfectly true surface. the weird spot on my ring is the side that i filed...
#13
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Re: why does my piston ring look like this?
I want to see someone clock the rings on an engine, run it for a couple days then take the pistons out and verify their position.
--Aaron
--Aaron
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Re: why does my piston ring look like this?
word. the tension on the ring keeps it in the same spot. when you see the piston move in the bore, its not the rings moving its the pistons sliding around the rings which move in the groove.
if you have relevant information to help me identify the source of the discoloration on my ring, then let it fly. if not, then go grab a cup of coffee, sit on the couch and read the helms manual
if you have relevant information to help me identify the source of the discoloration on my ring, then let it fly. if not, then go grab a cup of coffee, sit on the couch and read the helms manual
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