[Vwdiesel] More Quantum Questions?

[Robert Downes]

T&L: did he say it was an N/A Quantum? with those injectors, i assume it's a
TD...

William: the injectors should be rebuilt as a set, with new nozzles. i would
use the ones that were already in the engine but it doesn't really matter,
the only difference between the two types are the numbers stamped on them
and the nozzle.(make sure you get the right nozzles!)I have 3 TD and 1 NA
inj. body in my quantum motor. Also, if you have a good assortment of shims
and like a project, i see no reason why you shouldnt do it yourself. there's
a good how-to HERE<http://vincewaldon.com/index.php?option=com_content&task=view&id=20&Itemid=28>.
the best reason to pay a shop to do it is the cost of shims as you will need
to try several sizes before you get the pressure right. on the other hand, i
just had a local Bosch certified shop do mine and they only charged $35
each, with nozzles (the bit about the two types being interchangeable came
straight from them).

have fun! and thanks for using the list, community works!
-bob

On Sun, Jul 4, 2010 at 1:03 AM, William J Toensing <toensing at wildblue.net>wrote:

> I was gone for most of the month of June so finally got back to working on
> my Quantum. I sent my original IP back to a firm that advertises on eBay to
> rebuild injection pumps for $375 including shipping both ways.  The rebuilt
> IP arrived while I was on vacation. Yesterday I removed the old IP but
> haven't installed the rebuilt IP as I decided to test the injectors, which
> are easier to R&R with the IP removed. The #1 injector appears defective as
> it starts to spray a steady stream at 1000 psi but the other 3 popped off at
> 2000 psi, but was unable to observe the spray pattern. This is the first
> time I used the injector tester I bought a few months ago from the "Mercedes
> Source". Each injector seems to have its own serial number but found the
> following markings common to all the injectors" "060" enclosed in an oval
> circle, then 149 155 BAR. Then another number, "KCA30536/4".. I was thinking
> of using the injectors off my 1980 Dasher diesel parts car but those
> injectors were marked with different numbers & marked at "130 Bar" as
> opposed to the "155 Bar" on the Quantum's. Also, two of the Dasher's
> injectors appeared to be defective  & the other two popped off at 1600 psi.
> I wonder if I should try to repair the one defective Quantum injector,
> replace all 4 with new ones, or take all 4 of them out to a commercial shop
> to be rebuilt? The Mercedes Source tester came with a bunch of shims & other
> parts to rebuild the injectors. Instead of testing the injectors with diesel
> fuel, I decided to use "diesel purge" fluid since I felt this would do a
> better job of cleaning the injectors. Comments appreciated.
> Bill Toensing, Nevada City, CA
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