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fuel injector timing requirements

Discussion in 'VW Mk4 Jetta, Golf, New Beetle, Passat TDI forum' started by Tim Imbrock, Jun 30, 2012.

  1. Tim Imbrock

    Tim Imbrock New Member

    Joined:
    Jun 30, 2012
    Messages:
    1
    Car:
    VW Jetta/2003
    I'm new to the VW TDI forum. What are some of the issues and tools required to confirm correct injector timing after reinstalling the injector pump after the timing belt 100,000 mile service?
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  2. YMZ

    YMZ Super Moderator

    Joined:
    Sep 22, 2010
    Messages:
    1,905
    Car:
    Jetta 2003, Golf 2001
    Location:
    Latitude 44.407959, longitude -76.018369.
    welcometomyturbodies Welcome to the website!

    Have you gone over the timing belt r/r procedure?
    http://www.myturbodiesel.com/1000q/a4/ALH-engine-timing-belt-change-VW-Jetta-TDI-1.htm and
    http://www.myturbodiesel.com/forum/...-new-beetle-golf-alh-engine-1998-2003-a-2976/

    You really need to lock down the camshaft at TDC - with the sprocket loose, and need to lock down the pump hub - with the sprocket loose... then after tensioning the belt by turning the tensioner clockwise, you make sure that the crankshaft is at TDC (you can still move it a bit to get it dead-on - using the 12-point 19mm bolt at the front of the engine), and then lock down the 2 sprockets... (make sure to remove the camshaft locking bar before tightening the camshaft sprocket bolt (45 Ft*Lbs is considered optimal)... rotate the engine twice (again, using the crankshaft bolt) and check for TDC at all 3 spots... Then, after you've put Humpty-Dumpty back together and have started the engine, you can use either an official VW scanner or VCDS (new name for Vag-Com) to fine-tune the basic timing.

    H.T.H.

    Yuri

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