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2016 TRD Pro Engine Whine

Discussion in '5th Gen 4Runners (2010+)' started by jmh77, Mar 14, 2019.

  1. Mar 14, 2019 at 4:05 PM
    #1
    jmh77

    jmh77 [OP] New Member

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    Hello, new to the forum... hoping for a little insight into a recent concern with my 2016 4Runner TRD Pro. Bought the 4Runner new back in '16... it's been absolutely perfect with no issues. Then, all of the sudden, about a month ago it developed an engine whine. It started almost as if with a flip of switch... there was no gradual worsening... it just appeared one day while driving home from work. The "whine" is consistent with RPMs and seems to be coming from the passenger side of the motor. I removed the belt and ran the motor briefly to rule out any pulleys, etc... Still no change. I also did an oil change just to see if there was a difference... nope. Also no change with outside or operating temps. So... Took it into Toyota and they gave me the standard dealer answer... "Uhhh, we think it's 'kind of' normal". My response being... "how could it be normal if it was silent for 3 years and now it whines?" They shrugged. It's really quite annoying... almost to the point I want to trade it. I compared it to several other 4Runners... some were dead silent, and one or two you could kind of hear a slight whine... but definitely not as loud as mine. So, I returned to the dealership... The service writer and tech. both agreed it was loud. I came back at the end of the day to pick it up and once again... they blew it off saying they didn't really feel it was a concern. But, this time... the tech. told me that he thinks it's the transmission oil pump but they didn't seem too inclined to investigate further. So, that's where I'm at... I love my 4Runner but I'm left with just turning the radio up. Can anyone offer any ideas? Is this normal? At what point do I call Toyota corporate? Thanks in advance for any help!
     
    toy33 likes this.
  2. Mar 14, 2019 at 4:18 PM
    #2
    4buggy

    4buggy Relapsing mod addict

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    Whine or whistle? I assume you would have noted that you had an aftermarket or not original air intake. After trading my tacoma with a whistle at certain rpms, with a K&N intake, I tightened every new connection and looked for holes ANYWHERE air may be drawn to make that noise, with no fix, even when I let it go. So where I’m going with this is, check all clamps, openings, gaskets, and/or filters in your intake, that’s what I would do on my end.
     
  3. Mar 14, 2019 at 4:26 PM
    #3
    jmh77

    jmh77 [OP] New Member

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    Thanks. Definitely a mechanical “whine”, not a whistle. And yes, stock intake... everything is sealed and tight. One would assume an idler pulley or power steering pump... it’s that type of noise. But, I ran the motor briefly with no belt to rule out pulleys, accessories, etc. It sounds internal. I’m still under warranty... but they don’t seem to want to investigate further even though they agree that it’s a loud, irritating whine.
     
  4. Mar 14, 2019 at 4:29 PM
    #4
    4X4Runner

    4X4Runner Moderator Staff Member

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    The left coast
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    I’d keep taking it back and not settle with the “normal” response from them. Maybe take it to another dealer service department
     
    WallyT4R, 4buggy and HoBoDanny like this.
  5. Mar 14, 2019 at 4:29 PM
    #5
    HoBoDanny

    HoBoDanny Dude...

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    Take it to another dealer if yours won’t look into it.
     
  6. Mar 14, 2019 at 5:16 PM
    #6
    Firefly21

    Firefly21 New Member

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    Front diff needle bearing?
     
  7. Mar 14, 2019 at 6:33 PM
    #7
    4Runner_Patrick

    4Runner_Patrick New Member

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    Try switching into 4WD and see if it still whines...the needle bearing is in that area you describe.
     
  8. Mar 14, 2019 at 7:23 PM
    #8
    WallyT4R

    WallyT4R New Member

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    Call Corporate now. Your dealer is giving you the run around
     
    KSJ08 likes this.
  9. Mar 15, 2019 at 7:20 AM
    #9
    Hyper15125

    Hyper15125 Headlight Retrofitting Hobbyist

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    Wife’s 4Runner does the same thing but its not all that loud. Sounds similar to an alternator whine in a stereo system with a ground problem, thats my best description.
     
    Last edited: Mar 15, 2019
    HoBoDanny likes this.
  10. Mar 15, 2019 at 8:49 AM
    #10
    HoBoDanny

    HoBoDanny Dude...

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    :rofl:I read that all wrong
     
    WallyT4R likes this.
  11. Mar 15, 2019 at 12:43 PM
    #11
    jmh77

    jmh77 [OP] New Member

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    Thanks guys. I tried the 4WD... no difference unfortunately. I’m pretty certain the tech. might be right... it does sound as if it could be the oil pump. I just can’t get my head wrapped around why one day it’s silent, and the next it’s whining... and the dealership just shrugs. I wish I knew what is considered a “normal” sound. But seems I’m going to have to make that call to Toyota.
     
    WallyT4R likes this.
  12. Mar 15, 2019 at 2:57 PM
    #12
    4Runner_Patrick

    4Runner_Patrick New Member

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    Sorry to hear. At my dealer they have only 1 tech who had the knowledge to fix mine. He keeps it running like new.
     
    WallyT4R likes this.
  13. Aug 10, 2019 at 8:07 AM
    #13
    brownersd

    brownersd New Member

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    Hey hey all,

    I noticed the same noise with my '19, and was speaking with the head tech at my dealer. Evidently there is an air pump that pumps air into the engine, and this is what we are hearing and it is normal. It is the same noise you hear when turning off the vehicle, of the system purging. I was starting to worry that something was wrong too, but this is done as a part of the whole ECO process that everyone is jumping on now... I hope this helps...
     
    Last edited: Aug 10, 2019

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