replies Archived Message
Posted by Mark Banks on February 17, 2007, 2:25 pm, in reply to "Re: VW Sharan 1.9Tdi AFN glow plug fault."
Hi Bryan,
Its not the crank pulley (drives aux belt)that wears but the bottom spocket (toothed, that cambelt runs around) that wears on its mounting to the crankshaft. Instead of a conventional woodruff key it has a flat cut into the circumference abit like a ' D ' shape.
When slack the sprocket can chatter and the timing can slip from good to bad giving intermittant poor starting. I've done a few of these the worst one needed a new crankshaft really, guess what the customer traded car in.
Obviously it is always wise to fit a new crank pulley bolt upon cambelt replacement.
I hope this helps, first one I saw after checking glow plugs, compressions, contaminated fuel etc. had me pulling out what little hair I have left.
Mark
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| Message Thread:
- VW Sharan 1.9TDi AFN - Glow plug fault - Bryan Smith February 16, 2007, 5:01 pm
- replies - tim bowkett February 17, 2007, 12:27 am
- replies - steve middleton February 17, 2007, 8:36 am
- replies - Bryan Smith February 17, 2007, 11:03 am
- replies - Mark Banks February 17, 2007, 2:25 pm
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