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carfreak
3NE 2NR for life
Joined: 24 Jul 2007
Tech posts: 152
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 Posted: Fri Nov 06, 2009 9:01 pm
Post subject: oversized piston rings |
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Yeah fellas i saw dis on statement on d website here an it state dat for the engine build d owner used oversized piston rings. he say dat reason for Over Sized rings is when they break in they will wear back to oem standard size.
daz tru ent i mean i doh no much abt engine rebuilding (which i am learning abt currently) |
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brams112
3NE 2NR for life
Joined: 15 Jul 2008
Tech posts: 114
Location: trinidad
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Posted: Fri Nov 06, 2009 9:19 pm
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sounds like crap to me  how that fitting on the pistons? |
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neoise
3NE 2NR for life
Joined: 31 Mar 2008
Tech posts: 151
My 2NRide: Toyota NZE Corolla
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Posted: Fri Nov 06, 2009 9:47 pm
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We used oversized rings when the block had slight wear and a ridge that was honed out. The rings were filed back down to achieve the required clearance in the bore whilst on the piston. This was done to ekkk out some more life out of the block before having to spend money to bore out to a bigger size etc. Old time short cut nah  |
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wagonrunner
punchin NOS
Joined: 18 May 2004
Tech posts: 3625
Location: where the only valid opinion is theirs ....... :|
My 2NRide: Nissan Y10 Wingroad LE
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Posted: Fri Nov 06, 2009 9:51 pm
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| brams112 wrote: | | sounds like crap to me how that fitting on the pistons? |
[when a face palm just not gonna facking cut it] sigh [/when a face palm just not gonna facking cut it]
Cylinder walls wear over time, so spec rings may not seal properly.
oversized rings help seal better. |
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azoturbo
Trinituner Peong
Joined: 01 Feb 2007
Tech posts: 465
Location: in yuh mamy bed
My 2NRide: Suzuki Swift GTi
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Posted: Sat Nov 07, 2009 9:11 pm
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| neoise wrote: | | We used oversized rings when the block had slight wear and a ridge that was honed out. The rings were filed back down to achieve the required clearance in the bore whilst on the piston. This was done to ekkk out some more life out of the block before having to spend money to bore out to a bigger size etc. Old time short cut nah |
or resleeve it im currently faced with this decision |
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Sanctifier
30 pounds of Boost
Joined: 09 Jun 2004
Tech posts: 2534
Location: Good question!
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Posted: Sun Nov 15, 2009 7:08 am
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You still have to hone the cylinders before using oversized rings...and buy a new (EXPENSIVE) gasket kit.
oversized rings (with "standard" pistons) might sound like a cheap fix...
until you have to deal with "piston slap", when cylinder bore wear gets worse, (sooner rather than later.)
Oversized rings also tend to suffer from "ring flutter" more so than if they were correctly sized.
You save on the "rebuild" (for awhile)... but spend MUCH more on OIL!
BTW when the 2nd rebuild happens (pretty soon) you have to buy a gasket overhaul kit...AGAIN!
IMHO if you are keeping the car, it's better to get a small bank loan (18-24 months?) and do it right the first time.
More economical (in $$$...and OIL CONSUMPTION) in the long run.
Link--> Fixes for Oil Use and Piston Slap.
My $0.02ยข |
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Wizard
3NE 2NR for life
Joined: 26 Apr 2004
Tech posts: 116
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Posted: Sun Nov 15, 2009 7:31 pm
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sanctifier has the answer there
but the original thread post about wearing to factory size is absolutely wrong you cant wear the cylinder walls to get smaller lol |
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