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To Change or Not: Timing Chain, 164K miles

Discussion in '1st Gen. Tacomas (1995-2004)' started by Buffco, Sep 16, 2011.

  1. Sep 16, 2011 at 8:15 PM
    #1
    Buffco

    Buffco [OP] Well-Known Member

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    99 Tacoma. A year ago when I was doing my research before I bought the vehicle, I saw all kinds of guides talking about changing the timing chain in 22Re engines..

    I have the 3RZ engine 2.7l. I am hearing a high pitched buzz or rattle at certain RPMS. Now if I remember correctly, the guides I found said that as the timing chain stretched it started hitting the plastic guides and this caused a noise.

    Now, however, I can't find crap about changing the chain. Matter of fact, I just found a forum where people are saying you shouldn't have to change it till at least 250K miles...

    Someone fill me in?
     
  2. Sep 16, 2011 at 8:20 PM
    #2
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Moderator

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    A friend of mine had over 600k miles on his.....I wouldnt worry about it unless it starts making a banging sound...
     
  3. Sep 16, 2011 at 8:22 PM
    #3
    Buffco

    Buffco [OP] Well-Known Member

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    I seem to remember people saying at some point, Toyota went to a double roller rather than a single and this decreased stretch. Maybe I was looking at Hilux forums?

    Honestly can't remember...
     
  4. Sep 16, 2011 at 8:24 PM
    #4
    Buffco

    Buffco [OP] Well-Known Member

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    I wish I could figure out what this high pitch sound is. It does it at the peak of 2nd, 3rd gears and yesterday I took it on the interstate for the first time and it did it constant at about 71-73 mph. Backing off the gas stopped it immediately and stepping on the gas brought it right back.

    When revving up through second, it makes the noise, then quits, then it starts again at a different pitch, then changes back to the original noise, all the while I'm increasing speed.

    Sounds like a bearing, kinda...
     
  5. Sep 16, 2011 at 8:33 PM
    #5
    UndefinedTaco

    UndefinedTaco I'll eat all your food.

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    It's an 89 Toyota Pickup. I got some stuff done to it.. FJ axles going under it soon.
    Check for cracked exhaust manifolds...common on 96-00 Tacomas with 2rz/3rz.


    Timing chain should be never changed, if it breaks your motor is toast anyway.
    Unless your getting unusual stretch, which shouldnt happen.
     
  6. Sep 17, 2011 at 12:37 AM
    #6
    STLharry

    STLharry Lube: It's the key to penetration.

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    If a timing chain is about to go, you should be able to hear it. Other than that, I don't think 3RZ motors had chain issues.
     
  7. Sep 17, 2011 at 12:46 AM
    #7
    Hiatt1991

    Hiatt1991 Well-Known Member

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    Modified exhaust? Mine is loud so it rattles a lot
     
  8. Sep 17, 2011 at 6:53 AM
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    Buffco

    Buffco [OP] Well-Known Member

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    Not true. These are non interference engines. Broken timing chain will not screw the engine.
     
  9. Sep 17, 2011 at 7:31 AM
    #9
    twfsa

    twfsa Well-Known Member

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    I seen a post where the chain slopp wore a hole in the engine cover or block not sure of the location.
     
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