I saw 12 psi once hot, with surges slightly higher when revving up the
engine.  Normal driving maintained 10 to 12 psi.  I was surprised it was
this high.  This is an '85 with a brand new Boston Bob engine, all new
hoses, new water pump, thermostat, pressure cap, tank, etc.  I would have
guessed it would run much lower.  Temp gauge was right on the red light
area, or slightly below.  The 12 psi is near the set point of the cap,
although this was measured at the radiator.  Pressure at the tank feeding
the water pump may be lower due to inlet suction of the pump?  It took at
least 4 or 5 hours before I was able to remove the fitting due to residual
heat and pressure.   It did not drop immediately, which I took as a sign of
a pretty tight system.    I should have recorded the data a little better.
It was just a whim to try it, not really being used to diagnose any
trouble.
                                                                        Jay

Cary Chiang <cchiang1@yahoo.com> on 08/16/2002 09:08:01 PM

To:    Jay L Snyder/AE/DuPont@DuPont
cc:
Subject:    vanagon question

Jay:
Please elaborate on the readings you normally saw with your pressure gauge
connected to the vanagon radiator bleed screw.  How soon after shutting
off the engine before the gauge (system) lost pressure, and what reading
did you normally see when driving (7PSI, 10?).  Thanks.

Cary

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