Wonder if the missing 1/4" is in the oil pan.
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Originally Posted by Supe
(Post 1532430)
Wonder if the missing 1/4" is in the oil pan.
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Oil rings were all broken, bits were stuck in the ringlands.
https://cimg0.ibsrv.net/gimg/www.mia...2dfe766f4a.jpg |
Better open those gaps up for round 2!
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Ah. So gaps too small then. Or if they were proper, could have fucked 'em trying to drop the pistons in with that compressor that you're not a fan of.
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Reassembly has begun. Using Wiseco xx rings this time, I can tell they are much better quality. Got gaps set last night. Ready to use the new ring compressor.
https://cimg3.ibsrv.net/gimg/www.mia...4c700470c6.jpg |
Awesome man, get er' done
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I put it all back together this weekend and put on 100 miles yesterday. Oil consumption is still there, I can still see oil on top of the pistons too. Even fouled a few plugs.
I would bet that if I pull it apart again the bottom rings will be broken. I made very sure to check and set all gaps and the install was smooth. Any chance this is a piston or bore issue? I didnt measure the whole bores and only checked ring gap 1/2" from top of cylinder. I feel like maybe the bottom rings get tight lower in the bore, butt and break. Anyone have any ideas? |
Did you have the block bored or honed before installing new pistons? It's possible you're out of round/taper, but also possible that you've got the wrong gap for the type of piston. Just curious - are you running a 2618 alloy piston?
Ring install - are you sure all your rings are oriented properly? Most beveled rings need to be bevel down/indicator up, otherwise, they will scrape oil into the combustion chamber with each stroke. Does your wrist pin opening cut into your oil control rings? If so, that bottom ring that acts as a support rail will have a dimple that needs to be in the wrist pin opening. When installing the expander ring, are you sure the ends are butted, and not overlapping? |
If you put new rings and an old cylinder, it's important to measure the wear. It won't be even from top to bottom or latitudinally or longitudinally.
This picture is related to a diesel engine but you get the idea. http://www.marinediesels.info/repair...ar_pattern.gif |
Originally Posted by sixshooter
(Post 1533768)
If you put new rings and an old cylinder, it's important to measure the wear. It won't be even from top to bottom or latitudinally or longitudinally.
This picture is related to a diesel engine but you get the idea. http://www.marinediesels.info/repair...ar_pattern.gif |
Like you said, you could have cracked a ring or maybe the rings did not seat properly.
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Originally Posted by sixshooter
(Post 1533788)
Like you said, you could have cracked a ring or maybe the rings did not seat properly.
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Originally Posted by Supe
(Post 1533767)
Did you have the block bored or honed before installing new pistons? It's possible you're out of round/taper, but also possible that you've got the wrong gap for the type of piston. Just curious - are you running a 2618 alloy piston?
Ring install - are you sure all your rings are oriented properly? Most beveled rings need to be bevel down/indicator up, otherwise, they will scrape oil into the combustion chamber with each stroke. Does your wrist pin opening cut into your oil control rings? If so, that bottom ring that acts as a support rail will have a dimple that needs to be in the wrist pin opening. When installing the expander ring, are you sure the ends are butted, and not overlapping? |
Here is my piston spec sheet. I notice it says my oil control ring groove width is 4mm however my oil control rings with spacer is 2.8mm....that seems like a really loose fit. Thoughts? Or do they mean the ring groove depth?
https://cimg3.ibsrv.net/gimg/www.mia...cf84ab9098.jpg |
I figured out the problem. They sent me 1.0mm 1.2mm 2.8mm rings. The arias rings that should have come with them are 1.2mm 1.5mm 4.0mm. Here you can see what they sent and the catalog where it says what i need.
https://cimg3.ibsrv.net/gimg/www.mia...1fa478623b.jpghttps://cimg1.ibsrv.net/gimg/www.mia...86c7727e58.jpg |
Oh no, I hope they didn't destroy your cylinder surfaces!
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Originally Posted by sixshooter
(Post 1533826)
Oh no, I hope they didn't destroy your cylinder surfaces!
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Yikes. Presumably they sent you the same ring package twice?
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Originally Posted by Supe
(Post 1533835)
Yikes. Presumably they sent you the same ring package twice?
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