[Vwdiesel] timing belt and adjusting timing

[Bryan Belman]

Agreed, could be a mis-aligned pump.  I always put a flat metal strait edge on the face of the pump bracket to the front face of the block when installing a pump bracket to be sure the pump sits 100% parallel to the block.  There is play here and it can be off as all of these engines have been worked overy many times by many different people of the years.
 
 
Here is what I would check first.
1.
With the belt off, check for left right movement of the pump shaft by trying to move the pump sprocket left right, not up down.
 
The force of the belt pulls on the pump sprocket from the left, so if the front bushing is warn, it will move left right and the belt will want to walk off.
A minor amount of play is OK as long as it is not dripping fuel.
 
If that is good
2.
Check the pump bracket alignment to the block.
This is harder to do and involves removing the prompt sprocket with a puller.
 
 
 

Bryan Belman, Pt. Pleasant, NJ
04 Jetta Wagon TDI PD, 100hp, 5sp -- running :<)
92 Jetta 1.6 Eco-Turbo Diesel, 5sp -- running :<)
82 Diesel Westy 1.9NA -- running :<)
70 Type 1 stock Elm Green Beetle -- Under Restoration :-)

From: mark shepherd <mark at shepher.fsnet.co.uk>
To: vw fans <Vwdiesel at vwfans.com>; peter blake <pila47 at yahoo.com>
Sent: Sunday, November 13, 2011 9:08 PM
Subject: Re: [Vwdiesel] timing belt and adjusting timing

Forget the tensioner, unless the bearing has gone. [If it spins freely and with no sideways rocking, then it is fine]
Your problem is likely an overtensioned belt  making the pump's bearing behind the pump pulley oval, or indeed a loose pump mounting. or loose pump.

Mark


----- Original Message ----- From: "peter blake" <pila47 at yahoo.com>
To: <vwdiesel at vwfans.com>
Sent: Monday, November 14, 2011 1:19 AM
Subject: [Vwdiesel] timing belt and adjusting timing


> 
>  I'm about 90% convinced my pump timing is a little advanced.
> So I decided to get adventurous and do a little Hagar tuning.
> I pulled the timing belt cover because I at first thot that the
> third bolt was accessed fm that side. What I found is that my
> timing belt has a groove in it about a quarter inch in fm the
> pump side and that the outside of the belt appears to be machining
> itself against the belt tensioner flange. So I guess I need to
> replace the belt and tensioner and probably the water pump while
> I'm there.  I've generally used autohausz az in the past for parts
> and they have been very good but I'm open to suggestions if anyone
> has a better supplier. I'm thinking that a new tensioner should cure
> the self machining problem. Anybody have experience w this?
> As for the pump, I loosened all three bolts and tried to tap it
> w a rubber mallet and couldn't get it to move one iota. Any tips?
> Peter
> 
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> Vwdiesel at vwfans.com
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