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Thread: Subaru Impreza Wheel Bearing Noise

  1. #1
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    Subaru Impreza Wheel Bearing Noise

    A friend has a 2004 Subaru Impreza that I have somehow been tasked with getting roadworthy and getting back on the road. The car has numerous defects due to lack of maintenance including the Subaru headgasket oil leak problem, a split CV boot, a check engine light, various electrical issues, other minor issues but also at least one wheel bearing (or possibly a UJ) on the way out.

    I can work through most of the other issues but the wheel bearing is the one that causing me grief at the moment. No noise below 40kph but it then chimes in with a slight worn bearing sound linked to the road speed up to about 80kph then it is just a continuous load hum.

    From within the car it sounds as if the sound is coming from the drivers rear wheel but it really could be coming from anywhere. Driving and turning the sound does noticeably increase but unfortunately it does not matter whether turning left or right.

    Jacking each wheel up in turn does not show any slackness or movement.

    So any suggestions how I might determine which wheel could be causing the issue before I start dismantling each one in turn to find the culprit/s - I will start with the back drivers rear.

    Thanks

    Garry
    REMLR 243

    2007 Range Rover Sport TDV6
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    1976 Jaguar XJ12C
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  2. #2
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    I can't help with the diagnosis but I can warn you that Subaru wheel bearings can be a right bastard to seperate from the shaft.
    ​JayTee

    Nullus Anxietus

    ​Getting involved in discussions is the best way to learn.

    2000 D2 TD5 Auto: Tins
    1994 D1 300TDi Manual: Dave
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  3. #3
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    Quote Originally Posted by Tins View Post
    I can't help with the diagnosis but I can warn you that Subaru wheel bearings can be a right bastard to seperate from the shaft.
    Yes I heard that - so going to ring the roadworthy tester to ask if a noisy wheel is a fail, I suspect it is but I might as well ask.
    REMLR 243

    2007 Range Rover Sport TDV6
    1977 FC 101
    1976 Jaguar XJ12C
    1973 Haflinger AP700
    1971 Jaguar V12 E-Type Series 3 Roadster
    1957 Series 1 88"
    1957 Series 1 88" Station Wagon

  4. #4
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    I have a version of this kit Electronic Stethoscope Car Noise Finder Diagnostic Listening Device Machine T4N7 | eBay invaluable for tracing odd sounds!

  5. #5
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    Quote Originally Posted by eddy View Post
    I have a version of this kit Electronic Stethoscope Car Noise Finder Diagnostic Listening Device Machine T4N7 | eBay invaluable for tracing odd sounds!
    Thanks but a bit hard to fit to a wheel going 80kph.

    After looking up a few You Tube videos on this I decided wheel bearings on this vehicle are best left to the experts - why the designers made things complicated I dont know but aftermarket suppliers are now supplying the bearings pre installed in the hub on an exchange basis at a good price.

    Spent the day removing a front driveshaft to replace a CV boot - showed me one thing - I am not as young as I used to be as I could not remove the hub nut even with a air rattle gun or a breaker bar with a 4 ft extension (the You tube vids all had them removed with a battery torque driver - yeah right). But getting old also showed a bit of cunning as I just removed the whole hub with the drive shaft attached and then did the boot - smarter than the average ......
    REMLR 243

    2007 Range Rover Sport TDV6
    1977 FC 101
    1976 Jaguar XJ12C
    1973 Haflinger AP700
    1971 Jaguar V12 E-Type Series 3 Roadster
    1957 Series 1 88"
    1957 Series 1 88" Station Wagon

  6. #6
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    You obviously do not fit it to the wheel,you fit it to the hub.
    No problem detecting rear wheel bearing on a D4 after dealer diagnosed front bearing!

  7. #7
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    Quote Originally Posted by eddy View Post
    I have a version of this kit Electronic Stethoscope Car Noise Finder Diagnostic Listening Device Machine T4N7 | eBay invaluable for tracing odd sounds!
    On a Disco? I hope you bought two.
    ​JayTee

    Nullus Anxietus

    ​Getting involved in discussions is the best way to learn.

    2000 D2 TD5 Auto: Tins
    1994 D1 300TDi Manual: Dave
    1980 SIII Petrol Tray: Doris
    OKApotamus #74
    Nanocom, D2 TD5 only.

  8. #8
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    The kit contains six pick ups....usually sufficient!

  9. #9
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    Quote Originally Posted by eddy View Post
    The kit contains six pick ups....usually sufficient!
    I was thinking more along the lines of it wearing out...
    ​JayTee

    Nullus Anxietus

    ​Getting involved in discussions is the best way to learn.

    2000 D2 TD5 Auto: Tins
    1994 D1 300TDi Manual: Dave
    1980 SIII Petrol Tray: Doris
    OKApotamus #74
    Nanocom, D2 TD5 only.

  10. #10
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    As mentioned in my initial post I have a few things to fix on this POS. Done the CV, done the lights, not doing the wheel bearing until next year, now looked at the engine check light.

    The light comes on, on a cold start, then goes off after a couple of minutes and occasionally comes on at idle after that. I will get it looked at next year when the wheel bearing is done but is most likely either a knock sensor or an O2 sensor. So as an interim I thought I would just disconnect the check engine light for the roadworthy. The dash binnacle comes out no issue and completely unplugs from the loom. This gives easy access to all the globes and their holders - except for one - of course the check engine light - it does not live in a removable holder like all the other globes - no the globe is hard soldered direct to the circuit board where it is no really accessible unless you dismantle the entire instrument assembly and desolder the globe. - really

    How many other cars have their instrument lighting hard soldered to circuit board?

    Oh - also there is a crack in the windscreen that is just to the left of the drivers field of view. It has been there before the car was purchased 11 years ago. Passed garage rego and over the govt pits 4 times at the time with an advisory from the garage and nothing said from the Govt roadworthy inspectors. I bet if gets a fail this time just knowing my luck.
    REMLR 243

    2007 Range Rover Sport TDV6
    1977 FC 101
    1976 Jaguar XJ12C
    1973 Haflinger AP700
    1971 Jaguar V12 E-Type Series 3 Roadster
    1957 Series 1 88"
    1957 Series 1 88" Station Wagon

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