[Vwdiesel] More missing parts!

[LBaird119 at aol.com]

In a message dated 7/4/2010 4:21:20 AM Pacific Daylight Time, 
bobdownes at gmail.com writes:

  As far as the timing, it's REALLY easy to end up one tooth retarded 
when  r&r-ing the timing belt, which it sounds like you probably did.
When you put the lock pin in the pump gear, it has a little slop and 
due to internal spring pressure, it tends to rest at about 2/3 of a 
tooth retarded.  If you don't rotate it back then you'll put the 
belt on one tooth retarded.

  The missing pump mount bracket tends to make the engine surge 
since the pump will wobble back and forth a bit.  I've seen a few 
do this.  If your timing WAS indeed at .61mm this whole time, then 
you may not notice any surging.  It shouldn't be thick enough to need 
a longer bolt and I doubt whomever did it went to the trouble to find a 
shorter one when they inexplicably took the mount off.

> when the PO, a friend of mine, got the van(, the the IP leaked fuel
> from the LDA breather. he needed to use the van, is not super into 
> research.
> he opened the pump looking for a bad gasket, did not find the o-ring 
> around
> the pin separating the pump body from the LDA, determined that there was
> too-high pressure in there, found the 'weird' restricted out bolt hole,
> opened this hole up a bit(luckily not too much), van still ran, no more
> leak, he was happy. 

  Ok, so what's this weird restricted out bolt hole?  Do you mean 
the "out" banjo bolt from the pump to the return lines?

from the looks of it, sometime before this, someone (he
> 
> says it wasnt him) tried to adjust the internal pressure by banging the 
> lift
> pump pressure regulator piston allllltheway down. this is the condition 
> the
> pump was in until yesterday, including the aforementioned
> trans-caddy-corner-continental-mega-trek i got me hands on a new o-ring, 
> out
> bolt, reset the pressure regulator, and rigged a pretty nice internal
> pressure guage attachment so once i get the thing running, i should be 
> able
> to set it right lickety-split. just need to get a handle on my terror at
> this dial reading. i'm making way too big a deal out of a measly .4mm,
> aren't i?
> 

  .4mm is a LOT.  If the internal pressure regulator pin is what was 
tapped down, it screws with the timing and he may have backed 
it off to compensate for it.  So if that's been messed with and the 
"out" banjo, you need to replace that banjo bolt, to regulate the 
pressure properly and you need that regulator set properly as 
well.  Both control the timing advance and it's never going to run 
RIGHT if they're wrong.  I just dealt with the regulator pin being in 
too far on one and "simply" had it taken care of during a rebuild.  
You're not likely to get it right by guess and by golly.  :-(  A rebuilder 
should be willing to set that and replace the banjo bolt reasonably.
They might even have that bracket/mount too.
     Loren