1. Welcome to Tacoma World!

    You are currently viewing as a guest! To get full-access, you need to register for a FREE account.

    As a registered member, you’ll be able to:
    • Participate in all Tacoma discussion topics
    • Communicate privately with other Tacoma owners from around the world
    • Post your own photos in our Members Gallery
    • Access all special features of the site
    Quick Links: Replacing the stock horn, 2000 Toyota Tacoma Swapped stock headlight bulbs for LEDs. Aftermarket Radio Bank1 O2 sensor reading..... 1st gen turn signals to running lights with Switchback LEDs (a how to) Headlight restoration or Upgrade?

3RZ Noises...

Discussion in '1st Gen. Tacomas (1995-2004)' started by ₩oolongz, Mar 26, 2021.

  1. Mar 26, 2021 at 5:11 PM
    #1
    ₩oolongz

    #1
    ₩oolongz [OP] Member

    Joined:
    Nov 27, 2020
    Member:
    #347992
    Messages:
    7
    Gender:
    Male
    [3RZ with 63K in a 2001 reg. cab 4x4 .]

    After a long road trip a month ago it started making what I would describe as an echoey pop corning sound when going from 1500 to 2200 RPMs – seems I cannot hear it above 2200 but maybe that is other engine noise drowning it out. Bunch of guys say it must be valves and that 3RZs have to have a valve adjustment every 50K... not so sure, my local Toyota expert doesn't support that opinion. But we'll have to see what he says after inspection. Any thoughts folks?

    Main thing is I'm debating a $3K lift kit from Toytec and don't want to install and then have the engine crap out on me.

    https://soundcloud.com/user-937525916/3rz-popcorn-echoe-15-2k-rpm
     
    Last edited: Mar 26, 2021
    ₩oolongz, Mar 26, 2021
    #1
  2. Mar 26, 2021 at 7:36 PM
    #2
    TnShooter

    #2
    TnShooter The TacomaWorld Stray

    Joined:
    Sep 2, 2010
    Member:
    #42625
    Messages:
    17,302
    Gender:
    Male
    First Name:
    Deogee
    Vehicle:
    07' TRD Off-Road, Auto
    STOCK
    Does it sound like it’s coming from the timing cover area?
     
    TnShooter, Mar 26, 2021
    #2
  3. Mar 27, 2021 at 2:23 AM
    #3
    Allex95

    #3
    Allex95 Well-Known Member

    Joined:
    Apr 6, 2020
    Member:
    #324011
    Messages:
    1,380
    Gender:
    Male
    First Name:
    allex
    Vehicle:
    96 Tacoma 4x4 2.7l 4 cylinder
    3rzs make a lot of noise. For me I would just check valves and that’s about it. Unless you hear noises from the front then it’s chain, tensile, or guides
     
    Allex95, Mar 27, 2021
    #3
  4. Mar 27, 2021 at 2:58 AM
    #4
    super_white

    #4
    super_white Well-Known Member

    Joined:
    Feb 6, 2012
    Member:
    #72230
    Messages:
    6,641
    Gender:
    Male
    First Name:
    Harry
    Connecticut
    Vehicle:
    2012 Tacoma 4X4
    Under load? Is it spark knock? Maybe you put in low quality fuel during your road trip?
     
    super_white, Mar 27, 2021
    #4
  5. Mar 27, 2021 at 6:21 AM
    #5
    F.I.LetsGoFishing

    #5
    F.I.LetsGoFishing Well-Known Member

    Joined:
    Nov 9, 2011
    Member:
    #66729
    Messages:
    125
    Gender:
    Male
    exhaust leak at or near header possibly? would be more noticeable when you let of gas.
     
    F.I.LetsGoFishing, Mar 27, 2021
    #5
  6. Mar 27, 2021 at 12:07 PM
    #6
    Reh5108

    #6
    Reh5108 Well-Known Member

    Joined:
    Feb 18, 2013
    Member:
    #97832
    Messages:
    5,613
    Gender:
    Male
    First Name:
    Ryan
    Idaho
    Vehicle:
    2004 SR5 4X4 2.7L Extra Cab
    OME lift, 4x sliders, Demello rear bumper, custom front bumper, Engo 9000lb winch
    3rz are definitely known for valves tightening up. I've checked mine twice in the last 5 years and needed to make a minor adjustment both times.

    Most likely an exhaust leak on the egr gasket.
     
    Reh5108, Mar 27, 2021
    #6
  7. Mar 27, 2021 at 5:04 PM
    #7
    ₩oolongz

    #7
    ₩oolongz [OP] Member

    Joined:
    Nov 27, 2020
    Member:
    #347992
    Messages:
    7
    Gender:
    Male
    Thanks All. Gonna have to spend some time figuring out where the sound is coming from. I wouldn't really know if it's bad fuel, just Shell gas... was actually running some of that
    $12 LIQUI MOLY Valve Clean | 150 ml | Petroladititive | SKU: 2001, Blue
    LiquiMoly Valve Clean during the trip and it seemed to help reduce the sound. Load is normal, driver and passenger... that's it.

    Was reading up on spark knock... pretty interesting. I changed the spark plugs a few thousand miles ago and interestingly enough, one of the spark plugs was pretty loose... perhaps loosened by over compressed cylinder?

    Idk if anyone has heard the Mp3 I made in neutral revving from 1000-1500-2000 RPM. If you play it with volume up loud you can really hear it at 0:50.

    I don't think I'm gonna worry too much... no loss of power and my mechanic will check it out in week.
     
    ₩oolongz, Mar 27, 2021
    #7

Products Discussed in

LIQUI MOLY Valve Clean | 150 ml | Petroladititive | SKU: 2001, Blue
$11.22
To Top