Date: Thu, 14 Dec 1995 10:21:34 CST6CDT
Sender: Vanagon Mailing List <vanagon@vanagon.com>
From: "Dan Houg" <fairwind@northernnet.com>
Subject: wasserboxer coolant bleeding: a repost
apologies to the air-cooled crowd, i'm sure you're getting tired of
all this. and i bet you really want to trade-up for a wasserboxer!
Several tips have been previously posted on bleeding the system.
here is one i think works.
the Washer Pump method.
1. prep van per Bentley by raising front, opening bleeders, heater
cores open, etc.
2. drain the non-pressure overflow tank by sucking out the
anti-freeze with the contraption decribed below.
3. remove the overflow hose from the non-pressure reservoir tank.
attach this hose to a 'replacement' washer fluid pump (about $12)--
the other end will be connected to the pressure cap (works from '84 on, the
'83 1/2's had a different setup).
4. attach a piece of hose to the suction end of the pump and place
this in a jug of 70/30 anti-freeze/water mix or just straight
anti-freeze.
5. power up the pump (12v available at the alternator stud) and it
will begin pushing anti-freeze into your system. open the radiator
bleeder screw and let the air out. the pump will continue to push
anti-freeze into your system and displace air. do the same to the
rear heater bleed screw.
6. you may find it necessary to start the engine, warm it up, and
have the coolant circulate a while to move the entrapped air to the front. it
is a tedious procedure.
7. if air is in the pressure reservoir, just crack the cap open
slightly and it will burp it out. when you're done, hook the hose
back up and refill the overflow tank.
this procedure makes for a much cleaner operation back at the engine
and i think ensures a more positive bleeding of the air.
while you are fiddling around with all this, take time to ensure your
cap is operating properly. you should be able to blow air into the
nipple sticking out of the cap, and it should hold pressure when you
suck on it. anti-freeze is toxic, remember, so be careful to wash it
first.
-dan
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