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Thread: TD5 Drive Belt Tensioner Question

  1. 12th December 2010, 01:26 PM #1
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    TD5 Drive Belt Tensioner Question

    Hi All,
    About 100km ago the 110 suddenly started making a screeching / belt slipping noise whenever i applied a bit of the right foot.

    The belt is the original, has done 60,000km, as are the tensioner and idler pulley's. The vehicle is a late 2006.

    I am assuming the screeching is the noise of the belt slipping and not the idler or tensioner pulley bearings because the noise only comes about when I press the loud pedal and put the engine under load.

    The belt is generally in good condition with no rips or splits in it.


    Question:
    With no obvious way to increase the tension on the belt, whats the fix? New belt?

    From memory, the belt tensioner is sprung loaded to apply the correct pressure to the belt. Looking at it yesterday from underneath seemed to confirm this.

    Ive attached a couple of photo's of the belt and tensioner pulley. The belt has 2 lines marked on it that match the groove in the pulley.

    Opinions and suggestions please.

    Thanks
    Jon
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    Regards,
    Jon
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  2. 12th December 2010, 01:51 PM #2
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    How difficult is it to move the tensioner off the belt? Is it sticky in its movement etc.

    cheers
    Nick
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  3. 12th December 2010, 02:05 PM #3
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    stig0000
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    you sure its not the manifold studs broken, makes the same noise,
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  4. 12th December 2010, 02:51 PM #4
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    Quote Originally Posted by stig0000 View Post
    you sure its not the manifold studs broken, makes the same noise,
    Not sure it is, or is'nt, Is it likely?

    R
    Jon
    Regards,
    Jon
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  5. 12th December 2010, 02:53 PM #5
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    Quote Originally Posted by Hastykiwi View Post
    How difficult is it to move the tensioner off the belt? Is it sticky in its movement etc.

    cheers
    Nick
    Just been outside to check the tensioner bearing. All's good on that front.

    When I pulled the tensioner away from the belt, though it didnt seem to have much tension on. Wiggled it back and forth a bit and it seemed to 'go further back' from where it came.

    time for a drive!

    J
    Regards,
    Jon
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  6. 12th December 2010, 03:33 PM #6
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    its makes the same noise, had a few td5s come in with that problem and its been broken studs allmost everytime,

    the tensioner needs a lil force to move it, it dont need a braker bar to move it just say a normal sized spaner, i back them with a 3/8 drive ratch,
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  7. 13th December 2010, 01:16 PM #7
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    How can I tell if its the manifold studs?

    Whats should I be looking for?

    From memory they are pretty well burried under pipes, covers etc etc. I suspect the normal ones to go would be at the back end of the block where presumably it gets the hottest?

    Thanks
    Jon
    Regards,
    Jon
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  8. 13th December 2010, 02:37 PM #8
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    I've had the fan belt screech after going through a lot of dust. Can come and go for quite a while until it wears off.
    Mellow Yellow

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  9. 15th December 2010, 08:28 AM #9
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    Quote Originally Posted by Mellow Yellow View Post
    I've had the fan belt screech after going through a lot of dust. Can come and go for quite a while until it wears off.
    I've had the same. I usually get the engine warmed up, let it idle and then pour 2 or 3 litres of water onto the belt while the engine is running. This always fixes it.

    That said, I'm not sure about Yorkshire Jon's situation. Dirty belts tend to squeak mostly straight after the engine starts from cold (more load from the alternator), or on lock with the steering (more load from power steering pump). The fact that it's heard on acceleration makes me also very suspicious of the exhaust studs and subsequent leaking, which is a common TD5 problem.

    Just feeding more power shouldn't affect the belt.

    Cheers,

    Lionel
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  10. 18th December 2010, 06:57 AM #10
    catch-22
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    Quote Originally Posted by Yorkshire_Jon View Post
    How can I tell if its the manifold studs?

    Whats should I be looking for?

    From memory they are pretty well burried under pipes, covers etc etc. I suspect the normal ones to go would be at the back end of the block where presumably it gets the hottest?

    Thanks
    Jon
    Just get the boost to kick by applying the right foot with some force. If you hear a high pitched squeal, more than likely the bolts. They are easy enough to check when the motor is cool. Just have to get your arm in the right places. Just take your time and they should be easy to find and easy to check they are not loose and all still there..
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