Replace the pressure cap. If that doesn't take care of it then you need to
look for leaks where air is getting in or you have an internal head gasket
or cracked head leak.

Dennis

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
Michael Elliott
Sent: Saturday, October 20, 2007 7:52 PM
To: vanagon@GERRY.VANAGON.COM
Subject: My van makes coolant!

I replaced the water pump in my 1.9L yesterday, a thoroughly pleasant
task, and filled and bled the cooling system. I did it using TJ Hannink's
"raise the rear" method as shown on

http://www.vanagonauts.com/The-Contrarian-(easy)-Method194.htm

After the last of the bubbles came out of the hoses into the reservoir, I
filled it, then filled the overflow tank to between the min/max lines. Let
the engine cool, and noticed that engine had sucked in a bit of coolant so
I added a taste to bring the level back between the lines.

Took the van for a drive last night, checked under it this morning, no
leaks. Hurray!

This morning, I saw that the coolant level was well above the max line, so
I siphoned some out. Took it for another drive, let it cool for a couple
hours, and it was above the max line again. Siphoned more out. I moved the
van off the driveway and parked it on a hill, with its nose high to stop
blocking the driveway. An hour later I noticed that there was coolant
behind the van. The overflow tank was completely full!

Moved the van to level, siphoned more coolant out, cleaned up the mess.

At this point I've removed about 2 liters of coolant from the system. What
the heck?

--
Mike "Rocket J Squirrel" Elliott
71 Type 2: the Wonderbus
84 Westfalia: Mellow Yellow ("The Electrical Banana")
74 Utility Trailer. Ladybug Trailer, Inc., San Juan Capistrano
KG6RCR