Al, if there is too much air in the system (e.g., incorrectly bled, but everything else ok), coolant gets pushed into overflow tank. However, there is not enough contraction of the liquid in the cooling system proper to suck the fluid from the overflow tank back into the expansion tank. My local shop had a new tech work on my van this week, and he didn't get enough air out of the system. I have same problem.

John Lauterbach Macon, GA '84 DL ----- Original Message ----- From: "Al Ferguson" <al_ferguson@USA.NET> To: <vanagon@GERRY.VANAGON.COM> Sent: Saturday, March 24, 2001 9:21 PM Subject: Cooling question

I have an 89 Carat and a cooling question... It seems to run a bit on the hot side lately - almost in the hot zone. Yesterday I was driving it and the water flasher light started blinking indicating that the pressured reservoir was low. I stopped to check the non-pressured reservoir (under the Lic. plate) and noted it was full and the coolant in there was cold but indeed the pressured reservoir was low? What I am wondering is why the pressured reservoir is not sucking the fluid out of the non-pressured reservoir? I have replaced the radiator pressured reservoir cap with two different new units thinking this was the problem - but the system still does not sucking the antifreeze/water from the non-pressured reservoir to fill the system as needed. Any Ideas what is happening?

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