Results 1 to 18 of 18

Thread: 4AGZE piston rings?

  1. #1
    Learner / modder / Backyard Mechanic PrettyCoolWagon's Avatar
    Join Date
    Aug 2009
    Location
    Victoria
    Posts
    360

    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...
    https://www.facebook.com/gerard.mang...1485304&type=3
    The Corolla 4WD fan club: https://www.facebook.com/Corolla.Ae95.4wd?ref=hl

  2. #2
    Junior Member Chief Engine Builder wiso's Avatar
    Join Date
    Oct 2005
    Location
    NSW
    Posts
    3,275

    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
    Join Date
    Dec 2007
    Location
    QLD
    Posts
    492

    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
    I Tried to Eat Too Much Toyota oldcorollas's Avatar
    Join Date
    Aug 2005
    Location
    sydney
    Posts
    12,291

    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)

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

  5. #5
    Learner / modder / Backyard Mechanic PrettyCoolWagon's Avatar
    Join Date
    Aug 2009
    Location
    Victoria
    Posts
    360

    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
    The Corolla 4WD fan club: https://www.facebook.com/Corolla.Ae95.4wd?ref=hl

  6. #6
    Your mum is a Conversion King TERRA Operative's Avatar
    Join Date
    Mar 2007
    Location
    Queensland
    Posts
    2,261

    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.
    Sorry guys, I'm living in Japan so I can't do ECU repairs for the time being.
    Tereno Empireo Rapidmova Reakcii Armeo
    Check out my Youtube channel!


  7. #7
    AW11 <3 Too Much Toyota trdee's Avatar
    Join Date
    Jul 2007
    Location
    NSW
    Posts
    8,877

    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.....
    AW11 9A-GTE GTX3071R - project | ZN6 86 GTS - daily
    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

  8. #8
    Junior Member Grease Monkey
    Join Date
    Apr 2008
    Location
    Victoria
    Posts
    61

    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
    Join Date
    Jul 2005
    Location
    NSW
    Posts
    3,110

    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
    Join Date
    Aug 2009
    Location
    Victoria
    Posts
    360

    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
    I Tried to Eat Too Much Toyota oldcorollas's Avatar
    Join Date
    Aug 2005
    Location
    sydney
    Posts
    12,291

    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
    AW11 <3 Too Much Toyota trdee's Avatar
    Join Date
    Jul 2007
    Location
    NSW
    Posts
    8,877

    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.
    AW11 9A-GTE GTX3071R - project | ZN6 86 GTS - daily
    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
    Join Date
    Mar 2007
    Location
    Queensland
    Posts
    2,261

    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).
    Sorry guys, I'm living in Japan so I can't do ECU repairs for the time being.
    Tereno Empireo Rapidmova Reakcii Armeo
    Check out my Youtube channel!


  14. #14
    Its hard being a Backyard Mechanic RT40Corona4AGTE's Avatar
    Join Date
    Dec 2007
    Location
    QLD
    Posts
    492

    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
    AW11 <3 Too Much Toyota trdee's Avatar
    Join Date
    Jul 2007
    Location
    NSW
    Posts
    8,877

    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
    AW11 9A-GTE GTX3071R - project | ZN6 86 GTS - daily
    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

  16. #16
    Forum Sponsor Domestic Engineer Bazda's Avatar
    Join Date
    Jul 2008
    Location
    Auckland
    Posts
    546

    Default Re: 4AGZE piston rings?

    Yes the 8.0:1 uses are 1.5mm top ring, where the 8.9:1 uses a 1.2mm top ring.
    1988 Toyota Levin GTZ 10.88 @ 209.57 340kw
    Now 9AGTE 410kw atw
    www.mrpltd.co.nz - Manon Racing Products
    Turbonetics|Custom Coilovers|4/6 Piston custom brake kits|Twin/Triple custom clutch setups|+ MORE
    www.facebook.com/mrpltd - LIKE
    Check out the Toymods Sponsors section for Deals

  17. #17
    Learner / modder / Backyard Mechanic PrettyCoolWagon's Avatar
    Join Date
    Aug 2009
    Location
    Victoria
    Posts
    360

    Default Re: 4AGZE piston rings?

    Thanks Bazda pos - rep
    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

  18. #18
    A warning to all others! Backyard Mechanic
    Join Date
    Dec 2009
    Location
    CA
    Posts
    442

    Default Re: 4AGZE piston rings?

    I was told by a very reputable company that recently did the machine work on my adub 4agze rebuild that NPR makes the rings for Toyota, and those are generally the only ones they ever use. I had a set of them in hand during the machine work, and were going to use them until a specialty coating company screwed up my original pistons. Since I then had to get new pistons I decided to go ahead and get some oversize ones, and have the block bored out. When I went to check on new NPR rings for the plus size pistons I found out that there were virtually none in stock anywhere in the US. Plenty of standard size, but no plus sizes, and that was apparently normal stock conditions. How does that make any sense?! Has it gotten to the point where all US 4agze blocks are assumed to have already been bored out by now, and that they now all require sleeves, and might as well use standard size pistons?!

    Anyway, I then had to go for Toyota rings, and found out that they cost an arm and a leg compared to the NPR rings. Fortunately, the coating company was paying for these. When I got them I checked them against the standard size NPR rings, and other than a couple of slightly different markings near the end of each compression and scraper ring, which would have no effect upon their performance, they looked identical, not that that necessarily means a lot. What was odd, however, was that the oil scraper rings were designed in opposite manners. The Toyota rings aligned the flexible oil scraper rings with vertically shaped waves, and the NPR rings had horizontally shaped ones. I haven't heard that one design is any better, or different than the other, but I might check on it, just to see what is said about it, if anything.
    So long and thanks for all the fish!

Similar Threads

  1. 4AGZE bigport and smallport piston rings - are they the same??
    By cam_ra40 in forum Tech and Conversions
    Replies: 10
    Last Post: 22-02-2011, 06:20 PM
  2. 2 type of 2t piston rings?
    By rotorat in forum Tech and Conversions
    Replies: 3
    Last Post: 09-09-2010, 08:06 PM
  3. Fried Piston Rings?
    By H1TMAN in forum Tech and Conversions
    Replies: 11
    Last Post: 05-11-2008, 04:39 PM
  4. 1G-GTE piston rings
    By Pube in forum Tech and Conversions
    Replies: 13
    Last Post: 12-10-2007, 10:56 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •