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  • Whistling Sound at Low Revs

    Hey guys,

    I've searched, but nil on the 2.8 on a whistling sound coming from the engine at low revs yet... It can be cruising or up to around 1800RPM, but generally when the car is coasting or only has light throttle applied. If I punch the accelerator while this whistling sound occurs, it cuts out and only comes back once the Revs settle down again. I am thinking turbo - but what? For some reason, it also seems to be worse turning left... It sounds a little like the squeal of the brakes as they get old, but the brakes have nil to do with it - applying brakes/ pumping them etc has no effect whatsoever.

    Cheers for any suggestions (it's a 2016 GXL and the dealership's a bit of a hike away so would like to see if it's a simple thing).

  • #2
    I also experience the whistle. I'm sure its inherent with Turbos diesels. It happens at low RPM and low speeds.

    Thanks
    cuda
    2018 150 Series Crystal Pearl Prado VX 2.8l. 2 inch King springs and Bilstein shocks, Airtek TJM snorkel.

    Comment


    • #3
      It's an odd whistle and does not sound exactly like induction noise but my brothers 3lt 150 is exactly the same

      I have started to notice an engine rattle while underload at these lower Rpms as well

      Comment


      • #4
        Could be the DPF doing its cleaning - I noticed it once, but not recently.

        Comment


        • #5
          Definitely not the DPF - it's on almost all the time. And it's not normal turbo-sounding... imagine driving with your brakes squealing almost constantly (but half the loudness). It's only started in the past two weeks. Anyway - booked in for a warranty job ("I notice you're not a genuine Toyota customer"?!??!) Thursday week so we'll see how it goes.

          Thanks for the offer of suggestions - appreciated.

          Comment


          • #6
            Exhaust leak..
            Silver '04 KZJ120~Manual~GXL~Dobinson/Kings lift~Custom valved Ironmans~Detroit Locker~Endless Air~X9 Superwinch~Madman EMS1~TJM Dual Battery~Rhino Roof Tray~120W solar panel~Foxwing awning~Bushskinz UVP~Long Ranger water tank~Bushman fridge~Steinbauer P-Box~Beaudesert 2 3/4"~Airtec Snorkel~TJM Sliders~Prico Boost Gauge~BFG-KO2s~TPMS~GME TX3420~Front and Rear Cameras~Ultimate Camper hanging off the back!

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            • #7
              Originally posted by CamJam View Post
              Definitely not the DPF - it's on almost all the time. And it's not normal turbo-sounding... imagine driving with your brakes squealing almost constantly (but half the loudness). It's only started in the past two weeks. Anyway - booked in for a warranty job ("I notice you're not a genuine Toyota customer"?!??!) Thursday week so we'll see how it goes.

              Thanks for the offer of suggestions - appreciated.
              Interesting to find out if you have a damaged turbo?
              2018 150 Series Crystal Pearl Prado VX 2.8l. 2 inch King springs and Bilstein shocks, Airtek TJM snorkel.

              Comment


              • #8
                As Adrian5800 says, an exhaust gasket seal going is more a squealing sound, but could be your problem. Directly under the driver seat. Mines was only at idle, and disappeared with any throttle???
                Sounds a lot like that. $60 part to fix.

                https://youtu.be/EVNuw8I47a0
                SimpleSi
                Member
                Last edited by SimpleSi; 15-08-2017, 09:41 PM.
                [SIZE=1]2010 150 GXL Ebony Diesel | ARB Delux Bar | ARB Bashplates | GME 3450 UHF | Bilstein/Dobinson lift | SA LED Lighting 185W Spotties | Bridgestone D697LT | Wet Seat covers | LeighW's Voltage booster | Tin75 Pet barrier | 3D Mats'n'boot protector | Onboard ARB CKMA12 Compressor | Rhino Pioneer Platform | Roadsafe Recovery Points | Airtec Snorkel[/SIZE]

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                • #9
                  Hope it's not a faulty turbo compressor fin! See this thread: http://www.pradopoint.com.au/showthr...-Turbo-Failure

                  Comment


                  • #10
                    Originally posted by SimpleSi View Post
                    As Adrian5800 says, an exhaust gasket seal going is more a squealing sound, but could be your problem. Directly under the driver seat. Mines was only at idle, and disappeared with any throttle???
                    Sounds a lot like that. $60 part to fix.

                    https://youtu.be/EVNuw8I47a0
                    Gee that sounds an awful lot like it...! I took it in last Thursday, but of course the car got all coy on the Mechanic and, despite me warming it up and doing what I could, it behaved.

                    I've got my regular 30,000km service on the 4th - I'll see what they say then.

                    Comment


                    • #11
                      Still no joy in the squeal. I've had Toyota and Berrima Diesel (my local, who service it) have a look and of course the darn thing goes gun-shy as soon as someone with more knowledge than me gets in for a test drive (that'd be most). Berrima fully lubed everything they could - joints, pullys and the like in the hope it was something simple, and it went well right up until I pulled into my driveway. When I find out what it is I'll post the answer, in the hope of helping someone else.

                      I have a dash cam fitted that's got sound, but it's too inaudible for it to be picked up by it (so far). Next time I hear it I'll turn the aircon off or on (Berrima's suggestion) to see if that helps, as well as wind the window down so I can get the audio picked up and send it to them.

                      Thanks for the help though - appreciated.

                      Comment

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