Owl hoot noise from left front wheel area
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    1. #1
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      Owl hoot noise from left front wheel area

      My well-maintained '07 V70 T5 FWD with 306,000 miles has developed a noise that I've been unable to pin down. It seems to come from the left front wheel area, and sounds like an owl hoot with each wheel rotation when pulling away from stop, and fades after a few car lengths. I put the car in neutral, jacked up the wheel and spun it by hand, but heard no noise of any sort. M&S tire pressures dead on 35psi. Front brake pads at 4mm due for replacement in 4,000 miles. The noise continued before and after the recent replacement of the right front axle (I forgot to bring it to the mechanic's attention).

      What should I be looking at? TIA

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    3. #2
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      Quote Originally Posted by FredH View Post
      My well-maintained '07 V70 T5 FWD with 306,000 miles has developed a noise that I've been unable to pin down. It seems to come from the left front wheel area, and sounds like an owl hoot with each wheel rotation when pulling away from stop, and fades after a few car lengths. I put the car in neutral, jacked up the wheel and spun it by hand, but heard no noise of any sort. M&S tire pressures dead on 35psi. Front brake pads at 4mm due for replacement in 4,000 miles. The noise continued before and after the recent replacement of the right front axle (I forgot to bring it to the mechanic's attention).

      What should I be looking at? TIA
      Could be wheel bearing, does it get worse or better if you turn left or right at speed? (Torque wheel to one side or another while rotating)

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      Me: 2007 VR gt Slicktop Titanium Grey/Nordkap Wife: 2015 XC60 T6 AWD Ocean Race
      Past: 2006 V70 2.5T Willow Green/Oak, 2005 S60 2.5T Silver/Black, 1991 745 White auto, 1982 244 Silver 4spd w/od

    4. #3
      Senior Member ScottishBrick's Avatar
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      Dragging pad. Pull the caliper and clean the sliders and pads, grease and reassemble


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      2003 V70 T5 - Mystic/Graphite - M56LK - 202k - K24/Greens/Do88 IC/SMF & P2R Clutch/DW300C/H&R/Bilstein TC/Delrin/316mm & 308mm Brakes - SteveO Tuned
      1999 V70 T5 - Pewter/R Graphite & Alcantara - AW42 - 295k - Daily/Work Wagon
      1999 V70 T5 - Nautic/R Graphite & Alcantara - M56H - 177k - Rescued
      1999 V70 T5 - Emerald/Graphite - M56H - 119k - Garage Queen
      2000 V70 T5 - Mystic/Graphite - AW42 - 240k - Moms Unicorn
      2000 S70 GLT SE- Mystic/Graphite - AW42 - 215k - Sisters

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    6. #4
      Member Exocet's Avatar
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      Start with the dragging brake pad theory, since that is the cheapest. If it doesn't go away, look at the wheel bearing.
      2007 Volvo V70 2.5T - Mine
      2008 Nissan Titan SE 4x4, Crew Cab, Long Bed - Also Mine
      2012 Toyota Camry LE, 2.4 - Wife's
      2003 Mazda Protege5, 2.0 - Daughter #1
      2010 Mazda 6 Grand Touring, 2.5 - Daughter #2

    7. #5
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      Cheapest first is always the best way

    8. #6
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      Just returned from the quiet corner of the supermarket parking lot, doing figure eights (as tight as a V70 FWD can only do). I hung out the window as far as I dared and listened, going about 3-5mph. Direction of travel did not matter. It really mattered that I was pulling away from a stop, and it would fade away after several rotations. Also the "hoot" was more of a scraping "ring" with each wheel rotation. Something is scraping that generates more of a ringing vibration like a stamped piece of steel (backing plate?), rather than a heavy cast piece (caliper).

      I pulled the wheel to have a look. No shiny steel spots. Axle and disc turn smoothly, but I'm not familiar enough to compare normal resistance when turning by hand. Since I need new pads (and rotors) soon, they'll just come sooner to eliminate the caliper as the issue.
      Last edited by FredH; 01-19-2020 at 02:40 PM.

    9. #7
      Member Exocet's Avatar
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      Quote Originally Posted by FredH View Post
      Just returned from the quiet corner of the supermarket parking lot, doing figure eights (as tight as a V70 FWD can only do). I hung out the window as far as I dared and listened, going about 3-5mph. Direction of travel did not matter. It really mattered that I was pulling away from a stop, and it would fade away after several rotations. Also the "hoot" was more of a scraping "ring" with each wheel rotation. Something is scraping that generates more of a ringing vibration like a stamped piece of steel (backing plate?), rather than a heavy cast piece (caliper). I'm pulling the wheel to have a look.
      You can get a lip of rust along the edge of the rotor. This can rub on the caliper bracket or the dust shield. I've had to bend the dust shield a bit to eliminate this in the past.
      2007 Volvo V70 2.5T - Mine
      2008 Nissan Titan SE 4x4, Crew Cab, Long Bed - Also Mine
      2012 Toyota Camry LE, 2.4 - Wife's
      2003 Mazda Protege5, 2.0 - Daughter #1
      2010 Mazda 6 Grand Touring, 2.5 - Daughter #2

    10. #8
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      Sounds like the backing plate to me. Every time I mess with it I have to re-adjust it later.
      2001 V70 Silver - 198k miles
      2006 XC70 Ocean Race - 95K miles
      (Past: '94 944 turbo, sold at ~220k miles)

    11. #9
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      You can confirm it is a pad by pulling away from a stop while exerting light pressure on the bake pedal. If there is no noise then you likely have found the problem.
      01 v70 2.4T

    12. #10
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      Quote Originally Posted by Exocet View Post
      You can get a lip of rust along the edge of the rotor. This can rub on the caliper bracket or the dust shield. I've had to bend the dust shield a bit to eliminate this in the past.
      That was the culprit, and apparently quite common. It surprised me that it was the inner edge rather than outer edge of the wear surface where the rust buildup started to rub the backing plate.
      Last edited by FredH; 02-04-2020 at 07:46 AM.

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