always  change out any coolant you can.
So re-fill with high quality conventional anti-frz ( unless it has VW blue
stuff or something special in it ) and water at 50/50.

you can't change the coolant on a vanagon too much .  There's a lot in
there, it gets old and yucky, and you never get all the old out of it.

Actually .....what would be really right on most vanagons , is a full
completey coolant flush ......
drive it a week, and do it again, cause you never get all of  the old junk
out, and vanagons are very very good at having cooling system parts
deteriorate .........from heat and age, but also from leaving old coolant in
there.
*anything* you go do freshed up the coolant is always good.
scott
www.turbovans.com

----- Original Message -----
From: "Mark Brush" <mbrush@GMAIL.COM>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Sunday, June 28, 2009 6:56 PM
Subject: to add or to flush-n-fill

>I just put the oil cooler back on the van with the new gasket.  I'm hopeful
> that fixed my oil leak problem.  I was a messy job!  Lost more than 2
> quarts
> of coolant in the process.  So any thoughts on weather I should just go
> ahead and drain the whole system and refill, or would it be o.k. to add
> the
> 2 quarts back (in the overflow tank) and hope the system doesn't get
> airlock?  I understand the back-end has a self-bleeding system (the
> plastic
> tubing around the lip engine compartment).  thanks for your thoughts!
>
> Mark
>
> 1990 Westy GL