[Vwdiesel] Injection pump Bosch VE ---- ( swapping pumps )

[gary]

Nate,
Transverse or longitudinal makes no difference. If the pump numbers are
the same, then so are the internals (and externals).

The outlet banjo bolt does have a set-size bleed hole in it. However, it
is there to pass air, not so much fuel. If this hole does have some
bearing on internal pump pressure, I'm am most sure that it would be the
same size between all four-cylinder vw diesels.

If there were any variation in internal pressure, it would be
compensated for by changing the springs and/or shims in the timing
plunger section.

IMHO,

-Gary



 

On Mon, 2004-04-05 at 12:24, H.Hagar wrote:
> I have a spare injection pump and I've been hesitant
> to swap onto my Jetta TD since the inner (and outter)
> diameter of the return line fitting is much smaller
> than the one on the pump that is on the Jetta. I
> wonder if the fitting is installed at the factory to
> set the internal pressure. The spare came from a
> Quantum and I have a Jetta. I wonder if transverse Vs.
> longitudnal engine installation makes the difference
> in pump orientation having an effect on internal pump
> pressure.
> 
> I wounder if I should swap the return fittings if I
> switch the pumps. Is the fitting size matched to the
> pump, or pump location/orientation?
> 
> --Nate
> 
> 
> Nate please post the numbers on pumps ----  then the total knowledge
> here may just get you going.   The best part of diesels to me  , is that
> any pump that will squirt fuel at the right time and amount will do.
> 
> So even the smallest pump will get an engine going . And the bigger pumps
> can be regulated for the smallest engine.
> 
> We are getting in to " Hillbilly "  territory.      I experiment with pumps and
> injectors just about every day. And so far I found no reason that any pump
> any nozzle  in any combination.  Will not get you to the saltmine.
> 
> A while back I call Bosch Technical Support and asked
> specifically where I could get good hard numbers for
> tolerances and performance measurements for specific
> injection pump models. I was told that the information
> is proprietary and only released to Bosch Authroized
> Injection Puump Repair Facilities.
> 
> --Nate
> 
> I like the statement from William A Thompson  --- is it bendover  info ?
> yes indeed.  ---- Its like asking  Gates for the source code for windows.
> 
> Looking for the motherlode  --- here we go again.
> 
> We will find it due to the many skills found in this forum. It is to be found
> at BOSCH in Germany or VOW  Germany. That may involve a little bit of
> translation   ----  no problem. (and bribery)
> 
> The Bosch repair manual is out there and the numbers are listed for
> all pumps.   The repairstation need them for the testrig.   
> 
> Lets see if we can get Loren to go spy a bit at the station he visited before.
> He found out that different grades of vanes were available , last time.
> 
> Do not swap orifice without doing a bit of homework. Size of drainlines is
> not critical.
> 
> I am having a ball , experimenting  ---- There are 3 VW  diesel running here
> now ---- so if I screw up ?   --- I still get to town.
> 
> So what is different from one pump to the next ?   What does the letters at the end
> indicate ? ---- Same basic pump  -- 107 A      Letter means pump is set up for
> a certain engine --say 1.6L NA    --- On some turbo pumps the piston
> is slightly bigger diameter.(more fuel)   Am I rambling ?  --yes I am am.
> 
> 
> Hagar.
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