[Vwdiesel] VW injection pump head seal replacement

[Erik Lane]

I went out and bought a longer bolt with the same threads as the
center bolt and then used those same instructions. There is a cam
plate and rollers in there that will get out of place and you will
have to have the pump off of the car to put it back together because
you need to stand it on end to keep things in their place while
re-assembling. The bolt in the center holds the plate where it's
supposed to be, which also keeps the rollers sitting where they're
supposed to be. Be careful to not put too much force on that center
bolt cause you don't want to damage anything internally. That way you
back out the bolts on the four corners a turn or partial turn and then
screw the center one in until it touches. You keep repeating that
until you can see the o-ring. Then just do the reverse to slowly press
it back on. It takes a while, but is much easier than messing with
getting things back in position if they fall out when you're trying to
do it. (That is a heartbreaking sound when you hear the internal parts
shift around.)

Good luck,
Erik

On Tue, Jul 29, 2008 at 3:47 PM, Caleb Van Dyke <awaytothesea at yahoo.com> wrote:
> I am attempting to put a new O-ring seal between the pump and head, but I have a few questions:
>
> The procedure that I am using (someone referred me to it from this site) says I need to
> Install a short spacer and retighten the bolt down. Loosen torx bolts a small amount (1/4 turn each) and tighten the center bolt down a similar amount. Gradually work back and forth between the torx bolts and the center bolt loosening the torx a little, tightening the center one a little. When flush, the bolts are inserted clost to a 1/2" so there should be plenty of threads still inserted into the pump to keep the bolts from falling out.
>
> Why do I have to install a short spacer? I do not see how putting a spacer and then tightening the bolt down as I loosen the torx screws will accomplish anything. I would think the bolt would just tighten down on the spacer and then stop, not keep getting looser as I loosen the other bolts.
>
> Also, there is a procedure that I found on the internet for rebuilding TDI pumps made between 1996-2003 that looks very similar, but doesn't mention anything about this center timing bolt.
>
>
> Any help would be greatly appreciated.
>
> Caleb
>
>
>
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