Results 1 to 9 of 9

Thread: 4AGE and 4AGZE bottom end differences... Please help!

  1. #1
    Senior Member jet111's Avatar
    Join Date
    Jan 2009
    Name
    Mark
    State
    NSW
    Location
    Sydney
    Country
    Australia
    Posts
    181

    Default 4AGE and 4AGZE bottom end differences... Please help!


    TO REMOVE ADS, PLEASE
    REGISTER OR SIGN IN
    Well I broke my engine the other night (did a bottom end bearing) and this seems like a good excuse for a rebuild.

    I am currently running a stock JDM 4AGE 16v and I want to do it up so it can handle a little bit of boost, however I will be running it Naturally Aspirated for a while.

    My question is: What are the differences between the JDM 4AGE and 4AGZE bottom end besides pistons?

    Will I be able to run a 4AZGE bottom end with all my gear from the JDM 4AGE 16v? (head, throttle body, stock ECU, etc…)

    Keep in mind that I will be running this naturally aspirated for a while, obviously components will have to change once I supercharge it.

    Will I be able to bolt the 4AGZE bottom end onto my existing head without any dramas?

    I am pretty new to these engines so any info would be appreciated.

    Cheers.
    Last edited by jet111; 9th February 2009 at 05:31 PM.

  • #2
    Veteran Golberg's Avatar
    Join Date
    Dec 2008
    Name
    Lawrence
    State
    NSW
    Location
    Wollongong
    Country
    Australia
    Posts
    1,339

    Default

    Yes you're head will bolt onto a GZE bottom end, but its a shit idea to run it without any boost. Will run worse than your 4AGE

    The only drama you may have with the bolt together would be the oil drain at the back of the head. If its anything other than MR2 GZE you will have to block up the drain hole on the block.

  • #3
    Veteran
    Join Date
    Nov 2008
    Name
    Seamus
    State
    QLD
    Location
    Milton
    Country
    Australia
    Posts
    1,860

    Default

    Between YOUR version of the 4AGE and a 4AGZE: everything is different

    4AGZE crank has larger journals, the block itself is much stronger (7-rib), the conrods are much larger, and the wrist pins are also larger (20mm instead of 18)

    Your best bet would be to get a smallport bottom end (same as the GZE, except pistons) which will be great fun while NA, then when you decide to boost it throw in some GZE pistons

    And yes you can use all your JDM 4AGE Head/water/alternator stuff

    When you go GZE your JDM ecu will not cope

  • #4
    Senior Member Hen may possibly be a nut's Avatar
    Join Date
    Jan 2009
    Name
    Hen
    State
    Victoria
    Location
    Mt Macedon
    Country
    Australia
    Posts
    890

    Default

    ^^^^ = Correct

    But bear in mind that the main difference is between the generation of 4A you have (early, small bearings, 3 rib block etc etc), and the later generations of 4A. Not the 4AGE vs 4AGZE differences (they are minimal for a given build year).

    Hen

  • #5
    Senior Member jet111's Avatar
    Join Date
    Jan 2009
    Name
    Mark
    State
    NSW
    Location
    Sydney
    Country
    Australia
    Posts
    181

    Default

    Awesome, that is a big help... Ill start looking for a smallport bottom end. How many pounds / how much power can you safely run on stock conrods, are they worth replacing?

  • #6
    Senior Member Hen may possibly be a nut's Avatar
    Join Date
    Jan 2009
    Name
    Hen
    State
    Victoria
    Location
    Mt Macedon
    Country
    Australia
    Posts
    890

    Default

    Your rods will not be the weak point. In my opinion, they are common between GE and GZE, though some will disagree.

    If you've got the engine open, you could replace the rod bolts with something good, but don't worry about the rods themselves.

    Hen

  • #7
    Veteran
    Join Date
    Nov 2008
    Name
    Seamus
    State
    QLD
    Location
    Milton
    Country
    Australia
    Posts
    1,860

    Default

    I'd happily run AE92 Smallport/4AGZE rods (the same) to 250kw/atw every day

  • #8
    Veteran slydar's Avatar
    Join Date
    Nov 2008
    Name
    Dimitri
    State
    QLD
    Location
    Brisbane
    Country
    Australia
    Posts
    3,096

    Default

    running a ze na, while you plan/save to go turbo/ze is not a bad idea at all. its been done before plenty.

    if you get a late one, you will need a big port to small port adapter, and thats all, to run it on you big port engine management.

    the only difference is a touch of compression and cam timing. you will hardly notice it. if your old engine let go, it was probably on its way out, and not making full power anyway.

    a fresh import ze will match a worn out old big port i think.

  • #9
    Senior Member jet111's Avatar
    Join Date
    Jan 2009
    Name
    Mark
    State
    NSW
    Location
    Sydney
    Country
    Australia
    Posts
    181

    Default


    TO REMOVE ADS, PLEASE
    REGISTER OR SIGN IN
    I have a better idea of what I am looking for now... Thanks for all your help, the searching for a GZE block begins.
    Last edited by jet111; 10th February 2009 at 07:32 PM.

  • Similar Threads

    1. 4agze bottom end, 7afe bottom end other stuff
      By FORDISGAY in forum Car Parts For Sale
      Replies: 15
      Last Post: 20th November 2012, 04:34 PM
    2. SYDNEY-need 4agze or 4age bottom end!
      By tomasS in forum Cars or Parts Wanted
      Replies: 3
      Last Post: 27th February 2011, 11:39 PM
    3. 4agze bottom end on standard 4age head???
      By heartagram AE86 in forum Technical - Questions
      Replies: 4
      Last Post: 5th June 2009, 10:57 PM
    4. 4agze bottom end
      By Sprinter_Seth in forum Car Parts For Sale
      Replies: 4
      Last Post: 28th December 2007, 08:29 PM
    5. similarities and differences between 4age and 7afe bottom ends...
      By driftae71 in forum Technical - Questions
      Replies: 8
      Last Post: 9th December 2007, 09:09 PM

    Posting Permissions

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