[Vwdiesel] Simple little TDI question Phase II

[LBaird119 at aol.com]

In a message dated 5/8/2002 11:16:30 PM Pacific Daylight Time,
jhsg at sk.sympatico.ca writes:

> I wonder if there's a loose connection..., just enough to suck
>  air, but not enough to really leak to show up. Some crummy little check
valve
>  that was supposed to be changed too- cold weather climate cars needed
this-
> it was a trouble spot for gelling early on, and needs to be done if car
moves
> from
>  say Az to cold area. Dirty sock on pickup tube- too much suction causing
air
>  leak where there wouldn't normally be? Just some ideas...

  We checked those yesterday.  Pulled the sender unit out and did find
the boot that connects the return tube to the pickup reservoir was loose
on one end.  Everything looked like a good fit otherwise.  It's just darn
odd the way it's all set up.  Everything about the recirc. system makes
it more difficult to clear all air from the system!  The pickup is just a
tube
with a bottom and a grid of holes about 1 x 2 in the bottom of the side.
  I figured the next step is a plug in the hoses at the tank end and a Mitee
Vac put on the engine end of them.  Check for leakage.
  How do you know if the check valves need replaced?
     Loren