[Vwdiesel] Injection pump testing for beginners 9 ----( timing
piston and spring )
h_hagar at prcn.org
Wed Sep 29 11:34:02 EDT 2004
Lets say that you tested pump pressure and it varies with RPM. -- BUT the pressure
is low lets say 25 psi.
? what to do. If regulator valve will not bring it up ---then we take a close look
at timing piston return spring. --It is one mother of all springs for such a small pump.
Find a weaker spring or rework the one from pump ----piece of cake.
I have calibrated all kinds of instruments and gauges using acid. I suspect that
bosch has many different springs and that they are color coded. The one in my
hand is bright green. from a 107 A pump.
It is not as hard to do as some people say. Next Lorens dieselfest at Pacific
Beach --- I may show up in a white T -shirt (made by Lenora) saying
" I did a Bosch VE Pump ". Is 50 dollars a barrel making you smile ?
NO ? A hillbilly tuned Rabbit will. 78 miles to da gallon Imp.
PS: Remember you can NOT over lubricate the pump.The most economic so
far here ? --is still canning wax. (paraffin wax)
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