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Thread: 4ac n timing belt

  1. #1
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    hi does any1 know for sure whether the 4ac is an interference or non-interference design?..that is if the timing belt snaps will it damage the valves etc.?...and any1 knows how often i should replace the belt?60000Km or 100000 km?

  2. #2
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    im 90% sure they're non-interferance.

    as with i'm fairly sure ALL toyota timing belt motors (at least the ones i know (not the new ones)) are all non-interferance

  3. #3
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    any1 else wanna share their knowledge/experience? plss?

  4. #4
    Senior Member Dori_Dori's Avatar
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    im pretty sure you change them every 100 000km
    dats what i do.
    i hope this helps


    Cheers

  5. #5
    Senior Member gumbie's Avatar
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    Yeah they are definately a non interferance design.

    (I bought a AE82 with a broken belt, changed it and it went no worries)

    I'm pretty sure they are specified as a 60,000 belt but will

    go to 100,000 without dramas

  6. #6
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    ah ic..dats cool then..thx alot..btw did u change it yourself?

  7. #7
    Senior Member Medicine_Man's Avatar
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    My brothers old AE71 had a broken timing belt when we bought it, Didn't take too long to replace. Quite an easy job to do yourself if you have some mechanical ability.
    Why hesitate when you can accelerate???
    Yellow 1984 KE70 Corolla, 1.3L 4K-C, Tighe 104 Cam, Electronic Dizzy, Dellorto DHLA40s,
    4-1 Hurricane Extractors, 2" Exhaust System, 5 Speed, Factory Mags, Towbar, 33 RWKW Last dyno.


  8. #8
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    change every 100,000 and year i had mine break at 2am when i was drunk and changed it the next day and it was fine

  9. #9
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    get engine to TDC
    undo crank bolt
    pully off
    plastic covers off
    undo the 10mm bolt on the tensioner
    hold tensioner to the side
    take belt off..
    at this point you can change the cam seal (recommended)
    and the tensioner (if you buy a timing belt kit you get one with it, and a cam seal)
    put the new belt on, making sure the marks at the top of the cam gear and cover are lined up, and the key on the top of the crank is at the top still..
    do up the tensioner so the belt is tight.. not insanely tight.. just nice and firm..
    covers on.
    pully on..
    away you go

  10. #10
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    thx guys..yea i did a google search how to replace it ..anyway..i got the other belts on as well...the fan n aircon belt..so gotta take those off before i can start taking the crank pulley out...btw when u undo the crank bolt, will it turn the engine as well?..coz to get to the TDC u turn the crank bolt clockwise?..

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