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Vanagon concerns / Expansion tank air
« on: November 29, 2007, 12:05:39 PM »
I have 2 Vanagons, an 85 Westy and a 90 Weekender. Both are accumulating air in the expansion tank. The air in the 85 is seems to be pressurized and when I open the cap the antifreeze rushes back into the tank. The antifreeze doesn't appear dirty (oily). I replaced the cap about 15k miles ago while trying to figure out the cause of the blinking light. The engine does not run hot on long trips. The needle stays just over the light on the gage.
The 90 gets air in the tank and when I open the cap nothing happens. I replaced the cap with the old one from the 85 and I still have the problem. The antifreeze seems dirty but that could be because it just needs to be changed. This Vanagon also does not run hot on long trips. The needle stays over the light or slightly above it if the heat is off.
There is no change to the coolant levels in either overflow tank.
Any information would be helpful.
The 90 gets air in the tank and when I open the cap nothing happens. I replaced the cap with the old one from the 85 and I still have the problem. The antifreeze seems dirty but that could be because it just needs to be changed. This Vanagon also does not run hot on long trips. The needle stays over the light or slightly above it if the heat is off.
There is no change to the coolant levels in either overflow tank.
Any information would be helpful.