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High Pitched Engine Noise

Discussion in '1st Gen. Tacomas (1995-2004)' started by clarsen123, Nov 5, 2008.

  1. Nov 5, 2008 at 10:53 AM
    #1
    clarsen123

    clarsen123 [OP] New Member

    Joined:
    Nov 5, 2008
    Member:
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    Gender:
    Male
    SF Bay Area
    Vehicle:
    99 Prerunner
    bed liner, nerf bars, stereo
    My engine constantly makes a high-pitched turbo-like whine like it's revving too high, but the RPM's are OK. I replaced the air filter and it helped a little. I need this truck to last a lot longer. Any suggestions? The noise is directly proportional to the RPM, and it runs fine with decent acceleration for a 4 cyl.
     
  2. Nov 8, 2008 at 12:19 PM
    #2
    kmok

    kmok Plastidipped ma Hootus!

    Joined:
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    Kyle
    Columbus, Ohio
    Vehicle:
    2005 Subaru Outback XT 5MT
    Are you sure it's the engine? My truck is manual and is very high pitched in 1st gear with high rpms and I'm pretty sure it is just the transmission making the noise. If your truck is manual it may be the same thing.
     
  3. Nov 9, 2008 at 3:33 AM
    #3
    Mr.Fahrenheit

    Mr.Fahrenheit Dennis = sinneD

    Joined:
    Jun 2, 2008
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    American Canyon, California
    Vehicle:
    01 Taco 3.4L 5spd TRD
    K&N CAI, HUSKY LINERS, LOW PRO TOOL BOX, GRAY WIRE MOD, OPTIMA RED TOP, GOODRIDGE STEEL BRAKE LINES, FAB TECH LIFT,
    have another person rev the engine while you stick your head in the engine compartment to pinpoint the noise, you can even remove the serp belt/s to eliminate any accessory pulleys....
     
  4. Nov 9, 2008 at 4:55 AM
    #4
    HerNameIsLucy

    HerNameIsLucy I miss Lucy. :-(

    Joined:
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    John
    Equador. Don't know why.
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    RIP Lucy.
    She's gone but not forgotten.
    How many miles? Might be looking at a water pump with bearings that have had enough. My Ranger made a high pitched metallic sound that changed with RPM just before the weep hole in the water pump started peeing. I couldn't tell the bearings were going out by trying to wiggle the fan until I took the belt off.
     
  5. Nov 9, 2008 at 4:39 PM
    #5
    tacotoe

    tacotoe Pastry Chef

    Joined:
    Nov 25, 2007
    Member:
    #3593
    Messages:
    442
    Nebraska
    Vehicle:
    `01 DBL Cab TRD
    Gibson Cat-Back Exhaust
    Possibly the fan clutch?
     
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