[Vwdiesel] More Quantum questions?

[LBaird119 at aol.com]

A couple of questions: 1)Is the head gasket the same for the Quantum 
turbodiesel as for the Dasher &Rabbit diesels? The local parts house says it is. 

  They're actually right!  Same gasket, same most everything!

2)What is the best way to bleed air from the cooling system? 

  Usually isn't a problem.  Same as filling when empty, pull upper hose, 
fill, 
connect and fill reservoir.  Start warm up a bit shut down.  Pull cap, refill 
at 
reservoir.

3) Any particular 
> tricks to rebuilding the vacuum pump? I suspect mine has gone bad as the 
> brakes are much harder than they used to be. I ordered a vacuum pump rebuild 
> pump as well. Are the Quantum diesel vacuum pumps interchangeable with the 
> Dasher diesels?
> 
  Should be.  There are only two pumps that I know of.  The "rotary" 
one and the diaphragm one.  If the rotary ones aren't working they 
usually need the clearance between the lid and the rotor reduced or 
the vanes checked if they're sticking.  The vacuum ones nearly always 
just need a diaphragm kit.  It's cheaper than the "bigger" kit with the 
valves.  I've had better luck with the old valves than the new!

  Best test for a leaking head gasket is compression test or bubbles 
in the small return line and lots of pressure in the system (when you 
remove the cap) after just a short, light drive.  I guess there IS a 
test liquid for diesel head gasket leaks but most only have the fluid 
for a gasser and it'll test negative on a diesel.  
     Loren



**************
New MapQuest Local shows what's happening at your destination.  
Dining, Movies, Events, News & more. Try it out 
(http://local.mapquest.com/?ncid=emlcntnew00000002)