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Thread: 4AGZE piston rings?

  1. #1
    Learner / modder / Backyard Mechanic PrettyCoolWagon's Avatar
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    Default 4AGZE piston rings?

    Hi I'm currently stripping down an early AE92 GZE bigport engine & the plan is to do a franken-build using a 2nd gen GZE block with the oil squirters & higher 8.9:1 compression rods & ceramic coated pistons.

    I need to buy a new set of piston rings & am wondering if they're all created pretty much equal, or are there different types of piston rings for different applications?

    I'll be using a sc14 with overdriven pulley, 98 octane fuel & running synthetic oil once the engine has been worn in.

    Thanks.
    4AFE/gearbox issues, 4AGT/ZE replacement changes to fully blown 7AGTE project...
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  2. #2
    Junior Member Chief Engine Builder wiso's Avatar
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    Default Re: 4AGZE piston rings?

    alot of people out there will say no, there are not created equal. most will say use only Japanese made rings, stay away from American made stuff.

    I too would like to know how they differ. i mean, its a cut piece of metal. Are the differances in the metal composition, Coatings, Tolerancing? I mean if they aren't perfectly round it usually won't matter will it? as they grind to suit your bores anyway?
    89' MR2 AW11... His
    00' MR2 ZZW30... Hers

  3. #3
    Its hard being a Backyard Mechanic RT40Corona4AGTE's Avatar
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    Default Re: 4AGZE piston rings?

    just run with GZE ones from Toyota. They are pretty good..
    1967 RT40 Corona Current Project - http://www.toymods.net/forums/showthread.php?t=46182

  4. #4
    Junior Member Too Much Toyota oldcorollas's Avatar
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    Default Re: 4AGZE piston rings?

    Quote Originally Posted by wiso View Post
    alot of people out there will say no, there are not created equal. most will say use only Japanese made rings, stay away from American made stuff.

    I too would like to know how they differ. i mean, its a cut piece of metal. Are the differances in the metal composition, Coatings, Tolerancing? I mean if they aren't perfectly round it usually won't matter will it? as they grind to suit your bores anyway?
    composition = hardness and wear, and conformity to irregularities int he bore
    roundness = conformity to bore
    shape of edges = oil film differences and wear
    overall size/slot clearance/end clearance = leakiness or oil etc etc..
    lots of things....

    rings are not simple.

    edit: it also depends on the hardness of your bore too.
    "I'm a Teaspoon, not a mechanic"
    "There is hardly anything in the world that a man can not make a little worse and sell a little cheaper" - John Ruskin (1819 - 1900)

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  5. #5
    Learner / modder / Backyard Mechanic PrettyCoolWagon's Avatar
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    Default Re: 4AGZE piston rings?

    Hmmmnn..???

    I'm seeing rings advertized on ebay but don't know if there's any difference between

    4age

    4age 20v

    &

    4agze rings..

    rings used for boost, high revs applications etc.

    I could take it up with an engine builder that I know of before I re-assemble because I don't have any knowledge or experience with measuring cylinders or engine honing etc.

    Thing is, I don't know if they're reputable or not OR if they're familiar with the finer details of the GZE engine I'm building. I'm sure they know what they're doing.

    But if I could learn more before I go & see them that'd be helpful.
    4AFE/gearbox issues, 4AGT/ZE replacement changes to fully blown 7AGTE project...
    https://www.facebook.com/gerard.mang...1485304&type=3
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  6. #6
    Your mum is a Conversion King TERRA Operative's Avatar
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    Default Re: 4AGZE piston rings?

    If the Toyota part numbers are the same between 4AGE and 4AGZE of the same year, then the parts are identical.

  7. #7
    Toymods Events Secretary Too Much Toyota trdee's Avatar
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    Default Re: 4AGZE piston rings?

    speaking of rings, has anyone got reports, good or bad, on NPR? from what i understand they are a jappo company that specialise in piston rings, mostly oem applications. theres a set of brand new 8.9:1 GZE slugs for sale pre assembled with NPR rings for a decent price is all.....
    1988 AW11 9A-GTE - Turbo Missile | 2004 Elise K20A - N/A Screamer | 1984 MA61 1JZ-GTE - 80s cruiser
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    Mono blocs mate....as close to yours as a Ferrari is to a Fiesta

  8. #8
    Junior Member Grease Monkey
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    Default Re: 4AGZE piston rings?

    Nippon Piston Ring Co., probably make the OEM Toyota ones....concern would be if they were genuine (Jap made) or knock offs, like Chinese 'Nippon Racing'...

  9. #9
    MR 18RG Chief Engine Builder The Witzl's Avatar
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    Default Re: 4AGZE piston rings?

    toyota genuine rings are only around $250 when i last checked (several years ago tho) for GZE items, and i cant remember if they were different to 4AGE rings or not (i seem to think they are).

    I would just buy a decent brand myself, or genuine toyota.
    ...... butt scratcher?!


  10. #10
    Learner / modder / Backyard Mechanic PrettyCoolWagon's Avatar
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    Default Re: 4AGZE piston rings?

    Ok guys, so the resounding answer I'm hearing most is 'toyota GZE rings' - can't go wrong I guess.

    & despite the cost, once they're in, 'they're in' ...so it's a piece of mind thing I'm paying for too...

    Thanks all.
    4AFE/gearbox issues, 4AGT/ZE replacement changes to fully blown 7AGTE project...
    https://www.facebook.com/gerard.mang...1485304&type=3
    The Corolla 4WD fan club: https://www.facebook.com/Corolla.Ae95.4wd?ref=hl

  11. #11
    Junior Member Too Much Toyota oldcorollas's Avatar
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    Default Re: 4AGZE piston rings?

    the toyota rings have also been deisgned and tested specifically for those pistons.

    do GZE's have a habit of breaking rings or ringlands?
    "I'm a Teaspoon, not a mechanic"
    "There is hardly anything in the world that a man can not make a little worse and sell a little cheaper" - John Ruskin (1819 - 1900)

    AU$TRALIA... come and stay and PAY and PAY!!! The moral high horse of the world!

  12. #12
    Toymods Events Secretary Too Much Toyota trdee's Avatar
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    Default Re: 4AGZE piston rings?

    No. General cause of failure on any 4A seems to be oil system related. Usually spun bearings or failed rod bolts, the addition of boost doesnt normally change this. 4AGE+T conversions do seem to inevitably blow piston rings, but I think thats more of a mixture of using bodgy setups with old stock motors, which isnt all that surprising really.
    1988 AW11 9A-GTE - Turbo Missile | 2004 Elise K20A - N/A Screamer | 1984 MA61 1JZ-GTE - 80s cruiser
    Quote Originally Posted by Rex_Kelway View Post
    .....and the within first laps everything that made the AW11 great hit Rex as if the 'Gods of driving fun' had all Jizzed on his face.....
    Quote Originally Posted by JustenGT8 View Post
    Mono blocs mate....as close to yours as a Ferrari is to a Fiesta

  13. #13
    Your mum is a Conversion King TERRA Operative's Avatar
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    Default Re: 4AGZE piston rings?

    As above, spun bearings and snapped rod bolts are the most common failure points on these things. I haven't heard of ring problems on anything but the crazy or bad builds (assuming they're bedded in right).

  14. #14
    Its hard being a Backyard Mechanic RT40Corona4AGTE's Avatar
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    Default Re: 4AGZE piston rings?

    There were two different thickness GZE rings when I ordered my new GZE slugs and rings from Castle Hill Toyota many moons ago. The rings they sent were for a different GZE apparently, so beware that there are two different thickness ring sets. I think it was compression ring #2 that was a different thickness to the ones they originally sent me, but dont quote me there as it was a while ago.

    Atleast, thats what Mr Sloan at CH Toyota told me anywho !

    But yeah, I vote for Toyota Genuine rings. Its what I am using......
    1967 RT40 Corona Current Project - http://www.toymods.net/forums/showthread.php?t=46182

  15. #15
    Toymods Events Secretary Too Much Toyota trdee's Avatar
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    Default Re: 4AGZE piston rings?

    most likely the two rings are to suit the 8:1 pistons and 8.9:1 pistons....... just get the part numbers that corresponds to the same series gze and you will be right
    1988 AW11 9A-GTE - Turbo Missile | 2004 Elise K20A - N/A Screamer | 1984 MA61 1JZ-GTE - 80s cruiser
    Quote Originally Posted by Rex_Kelway View Post
    .....and the within first laps everything that made the AW11 great hit Rex as if the 'Gods of driving fun' had all Jizzed on his face.....
    Quote Originally Posted by JustenGT8 View Post
    Mono blocs mate....as close to yours as a Ferrari is to a Fiesta

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