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Thread: Engine Failure Driving Home - Land Rover Defender 110 TD5 1999 X-Treme

  1. #1
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    Engine Failure Driving Home - Land Rover Defender 110 TD5 1999 X-Treme

    Good Morning team,

    I'd very much like your learned opinions (and hopefully a less pessimistic outcome); I was driving my good old Landie home from the coast on the weekend and out of nowhere, a very disturbing knocking noise developed in the engine. I pulled over immediately and gave it a tentative rev, to discover that the knocking increases with revs.

    Suffice to say I was very disconcerted by this and an NRMA Premium Roadside assist tow later, I was at my local mechanic. The NRMA call-out mechanic was the first one to deliver the heartstopping words "it sounds terminal", with the same diagnosis given to me by my local mechanic. He suggested he could have switched the injectors around to see if that was an issue (this was largely techno-jargon which went above my head however) but that it would likely have come to the same conclusion.

    I don't hold out much hope, but I thought I'd post here to see if I could MAYBE get a better outcome? Landie has just clocked up 212000 and has just had a reconditioned gearbox put in it.

    Thanks in advance,

    Toby

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    As you did not mention any red lights on the dash you an rule out oil loss. Could be a timing belt issue. This would cause the inner workings to go out of sinc. If stopped in good time it might not be too serious. Once your mechanic has a look inside you will know for better or for worse.

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    Quote Originally Posted by spudfan View Post
    As you did not mention any red lights on the dash you an rule out oil loss. Could be a timing belt issue. This would cause the inner workings to go out of sinc. If stopped in good time it might not be too serious. Once your mechanic has a look inside you will know for better or for worse.
    Good Morning,

    You're correct; no warning lights. The mechanic has had a look at it and diagnosed it as fatal though (without actually taking anything apart). Perhaps I should get a second opinion (hence this thread) but he's quite a good mechanic.

  4. #4
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    The reason I mentioned the timing belt is I had one shred on a 200 tdi a number of years ago. It was only about 3,000 miles after it was changed. Obviously it had not been done correctly but it is very hard to prove. Any way there was very little damage done. I think it was a couple of valves got bent. It was easily sorted. Needless to say there was no responsability taken by the garage. Any timing belt changes since have been done elsewhere.

  5. #5
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    No timing belt on a td5, could be chain failure but that is more likely to lock the motor. Balancers fail and knock so I'd be checking that.
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    Is your mechanic experienced with the TD5 engine? I wonder because the injectors can't just be switched around and therefore talking to a LR specialist might be worthwhile. A suitable diagnostic tool will show if there is an injector problem.

    Has the oil level been checked, possibly very low or overfull?

    Does the oil low pressure light show before starting? The wires to the pressure switch can deteriorate and break thereby not showing when no oil pressure and the TD5 is renowned for loosening of the bolt holding the sprocket to the pump and eventually loosing oil pressure.
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  7. #7
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    That you were able to give it a "tentative rev" indicates, to me, that the timing chain isn't at fault - it still ran. Was the knocking a sort of "deep seated" knocking or was it more a sort of "peripheral" knocking.

    If it sounded "deep seated" I'd take the sump off and have a look at what's what whilst at all times hoping that the level of destruction isn't too bad.

    If it was more of a "peripheral" knocking I'd be looking at the crank pulley/harmonic balancer, the water pump and the steering pump.

    Here's hoping that the outcome isn't too expensive or indeed terminal.
    Cheers,
    Mark F...
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    I pulled over immediately and gave it a tentative rev, to discover that the knocking increases with revs.
    If you were only at low revs it could be that the rubber has disintegrated in the Harmonic Balancer.

    I can attest from a friend's D2 that when the balancer goes, it gives a loud knock at idle.

    So take off the ribbed belt, after removing the fan and shrouds and see if you can move it by hand back and forth.
    Regards PhilipA

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    Quote Originally Posted by PhilipA View Post
    If you were only at low revs it could be that the rubber has disintegrated in the Harmonic Balancer.

    I can attest from a friend's D2 that when the balancer goes, it gives a loud knock at idle.

    So take off the ribbed belt, after removing the fan and shrouds and see if you can move it by hand back and forth.
    Regards PhilipA
    I would recommend to remove the fan belt and start the motor just to see if the knocking noise is still there.
    Could be harmonic balancer(will still knock with belt off!), could be tensioner, could be fan bearing, could be alternator! .. not hard to remove belt, and you can easily run a motor without the fan belt for a good 30sec or so(maybe more when cold) for diagnosis.

    Knocks could be anything .. loud, intermittent .. etc.

    Strange ones that nearly got away from me:

    Brother's Td5 D2. prior to servicing it for a weekend away, I hear a knocking noise. Not a thumping knock, but loud enough to be a worry. First thoughts were major damage, but remove the fan belt and knock was gone.
    Fan belt on knock came back. I started to remove the tensioner, first/easiest thing to check .. and whilst hands down there I noticed the alternator moved around a lot .. for a fixed item!
    Aha! .. inspecting closely the small aluminium holding bracket was snapped at the rear end of the mounting bolt, big crack at the front eye mount.
    S/H mount found, installed ... knocking gone.

    The other annoying knock was my Tdi: Took many months, maybe even close to a year to solve. Sounded like small end or big end bearing issue, except far too intermittent. Knock seemed to come from passengers side front of engine.
    Replaced what looked like a wobbly(not perfectly round) water pump pulley .. not it! removed many fan belt items, replaced water pump(as this seemed where the noise was coming from) .. also a bit of preventative maintenance too.
    After many months and some annoyance .. turned out to be a slightly too long fan belt! Being a few millimeters too long allowed the tensioner to 'bottom out' and rest stops touched .. intermittently! Cost about $15 for the new belt.

    Main point is not to assume the worst, only to find out it was something hilariously simple!
    Arthur.

    '99 D1 300Tdi Auto
    '03 D2 Td5 Auto

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