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  1. #1
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    Timing belt renewal 1.9 TDI ASZ (PD)

    I am thinking of renewing the timing belt on my Golf 4 1.9TDI ASZ, 96kW (PD), 2002, as it nears 90,000km.

    I have some questions:

    i) I understand that the tensioner should be replaced at the same time, but should the water pump also be replaced?

    ii) The manual that I have describes fixing the camshaft in position (using a special tool), removing the sprocket on the camshaft, re-fitting it (upon fitting the new timing belt) and re-torquing it. I do not really understand this. The camshaft is keyed so what is the point of removing it and fitting it back on. Is this really necessary?

    iii) My manual also describes fixing the fuel pump sprocket in the correct position (using a special tool) slackening 3 radial bolts on the fuel pump sprocket but not the main central bolt then re-tightening the 3 radial bolts (upon fitting the new timing belt) to a pre-torque, taking the car to a VW dealer (the engine can run with the 3 bolts at their pre-torque), having them check the timing electronically and finally tightening the three bolts after that. Is this also really necessary? Can one not just leave the 3 bolts and fuel pump sprocket un-touched and also not bother with the electronic timing check at VW?

    Or am I right in thinking that my manual does not cover the TDI PD (ASZ) engine fully and that the timing belt renewal procedure on the PD engines differs to that on non-PD engines?

    Any advice on DIY timing belt replacement on VW TDI PD engines would be much appreciated.

    Many thanks in advance,


    Jonathan Butler

  2. #2
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    Re: Timing belt renewal 1.9 TDI ASZ (PD)

    Always replace the water pump, your manual is describing the process for a VEP engine, not a PD-buy a better manual.PM sent.
    Dark was that day when Diesel conceived his grim engine that begot you, vile invention, more vicious, more criminal than the camera even, metallic monstrosity, bale and bane of our culture, chief woe of our Commonweal. How dare the Law prohibit hashish and heroin yet license your use, who inflate all weak inferior egos? Their addicts only do harm to their own lives: you poison the lungs of the innocent, your din dithers the peaceful, and on choked roads hundreds must daily die by chance-medley. Nimble technicians, surely you should hang your heads in shame. Your wit works mighty wonders, has landed men on the Moon, replaced brains by computers, and can smithy a "smart" bomb. It is a crying scandal that you cannot take the time or be bothered to build us, what sanity knows we need, an odorless and noiseless staid little electric brougham.

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  3. #3
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    Re: Timing belt renewal 1.9 TDI ASZ (PD)

    Quote Originally Posted by butljon View Post
    I am thinking of renewing the timing belt on my Golf 4 1.9TDI ASZ, 96kW (PD), 2002, as it nears 90,000km.
    ii) The manual that I have describes fixing the camshaft in position (using a special tool), removing the sprocket on the camshaft, re-fitting it (upon fitting the new timing belt) and re-torquing it. I do not really understand this. The camshaft is keyed so what is the point of removing it and fitting it back on. Is this really necessary?
    Aye - you can't get the belt on unless you fit together with the sprocket if its the one I'm thinking of.
    Quote Originally Posted by butljon View Post
    iii) My manual also describes fixing the fuel pump sprocket in the correct position (using a special tool) slackening 3 radial bolts on the fuel pump sprocket but not the main central bolt then re-tightening the 3 radial bolts (upon fitting the new timing belt) to a pre-torque, taking the car to a VW dealer (the engine can run with the 3 bolts at their pre-torque), having them check the timing electronically and finally tightening the three bolts after that. Is this also really necessary? Can one not just leave the 3 bolts and fuel pump sprocket un-touched and also not bother with the electronic timing check at VW?
    Without loosening the 3 bolts, the belt is not free on one side, so when tensioning, youre effectively only doing so on half of the belt length, as the other is locked by the sprockets. Therefore incorrect tension will be set.
    2011 Audi RS5
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    2005 VW Bora 1.9 TDI, 2000 VW Bora 1.6 , 1989 VW Polo 1.4

  4. #4
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    Re: Timing belt renewal 1.9 TDI ASZ (PD)

    Personaly I always change the waterpump if it either is part of the timing belt run & is therefore driven by the timing belt or if you have striped everything out to do the belt & to do the waterpump in the future would almost be a repeat of the timing belt, The problem you get faced with is any contamanants on the belt potentially destroys it, then its knackered engine, so for the cost of a decent pump just do it :-)

 

 

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