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Thread: At my wits end..Cant find the source of a engine noise

  1. #1
    Defends Guest

    At my wits end..Cant find the source of a engine noise

    Hi guys....I have a 300tdi I have been the carer for 17 years...about 385,000 KMS
    Done pretty much all the work on her myself...but this has got me really stumped...hoping someone might have a idea

    I have a noise ..hard to explain but sounds like a power steering pump whine/squeal / groan...fairly high pitched...seems to come from drivers side of engine...heres the thing....its ONLY > in 3rd at 80 KPH > and in 4th/ 5th right on 95-100pkh...gets louder the more you try and put your foot down
    so far I have
    > replaced the brake servo and vaccum pump
    > the Fan belt, idle pulley...
    > the power steering pump...
    > the fuel sender
    > Fan centre mount thing ( the metal bit the fan blades go on)
    > changed the oil and oil filter
    > fuel filter

    The noise appears about 3000 -3200 rpm..get louder..if you put your foot down..Im going to swap out the fuel lift pump tomorrow...> I thinking injector pump now???? > anyone had something similar > WHAT WAS IT?

    The turbo seems to spin up fine...the rest of the drive train seems fine ( no noises under 80 kph anywhere(
    ( other than the normal squeaks ect)
    oh...I cant seem to make it do it if its in neutral ..only happens if in gear as far as I can tell

    Cheers fellas !

  2. #2
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    can you get a recording of it from different spots in the cab and listen back to them as i found that helped track down where it was coming from

    i once chased a noise in one of my defenders that i swore was engine/ancillary and it ended up being transfer case related

    sorry cannot help any more than that

    best of luck getting to the bottom of it
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  3. #3
    Join Date
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    Quote Originally Posted by Defends View Post
    Hi guys....I have a 300tdi I have been the carer for 17 years...about 385,000 KMS
    Done pretty much all the work on her myself...but this has got me really stumped...hoping someone might have a idea

    I have a noise ..hard to explain but sounds like a power steering pump whine/squeal / groan...fairly high pitched...seems to come from drivers side of engine...heres the thing....its ONLY > in 3rd at 80 KPH > and in 4th/ 5th right on 95-100pkh...gets louder the more you try and put your foot down
    so far I have
    > replaced the brake servo and vaccum pump
    > the Fan belt, idle pulley...
    > the power steering pump...
    > the fuel sender
    > Fan centre mount thing ( the metal bit the fan blades go on)
    > changed the oil and oil filter
    > fuel filter

    The noise appears about 3000 -3200 rpm..get louder..if you put your foot down..Im going to swap out the fuel lift pump tomorrow...> I thinking injector pump now???? > anyone had something similar > WHAT WAS IT?

    The turbo seems to spin up fine...the rest of the drive train seems fine ( no noises under 80 kph anywhere(
    ( other than the normal squeaks ect)
    oh...I cant seem to make it do it if its in neutral ..only happens if in gear as far as I can tell

    Cheers fellas !
    Leaking turbo hose? I've had one do something similar under load in a Daihatsu Rocky years ago. Leaking just enough to make a noise but only under full boost and under certain conditions.

    Regards

    Tote
    Go home, your igloo is on fire....
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  4. #4
    DiscoMick Guest
    Pulley running dry or off centre, maybe on a belt?
    Manifold gasket air leak?
    Just wild guesses.

  5. #5
    Join Date
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    Firstly welcome!

    I've recently had a transfer case failure preceded by a whine above 100km/h 2100rpm now gone with a replacement TC. Worn bearing suspected. The "not in neutral" would point me in a driveline direction particularly given the mileage.
    Mahn England

    DEFENDER 110 D300 SE '23 (the S M E G)

    Ex DEFENDER 110 wagon '08 (the Kelvinator)
    http://www.aulro.com/afvb/members-rides/105691-one_iotas-110-inch-kelvinator.html

    Ex 300Tdi Disco:



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