In my opinion you almost can't change the coolant too much on a 20+ year old vanagon .. as a-frz deterorates in it's corrosion-prevention qaulitiesover time, you never get all the old out really .. it's often not done ... and corrosion is the main enemy of vanagons... Every two years , the 'forever' standard, still applies I think. on the bong ..the higher the better I'd think ..to get 'higher.' one end compared to the other. I don't find the need for one though. I don't even find the need to 'go nutty' on bleeding. Just top of the pressure bottle ( and maintain license plate bottle level )every warm up-cool down cycle for a while ...like up to 6 cycles. Air will work its way out . Just top up the ( when cold ) air space on top of the pressure bottle. . Expect that there may always be some air space there eventually .... ..but if it's like 2inches..top up with your a-frz mixture. After a number of cycles you won't be able to get any more in . I find that to be plenty bled. Besides, it's good to check things now and then after you do any work on the rig, fora while.
On 11/29/2012 7:49 PM, Dennis Haynes wrote: > Why do you think you "have" to change it? Coolant can also be tested for > condition and additive effectiveness. > What type do you plan to use? Why? > And there should be no need for weird fill or bleed methods. The main trick > is to fill-bleed with engine cold. > > Dennis > > > -----Original Message----- > From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of > JRodgers > Sent: Thursday, November 29, 2012 8:37 PM > To: vanagon@GERRY.VANAGON.COM > Subject: Libby Bong and coolant change > > Have to change the coolant in both of my '88GL's. Have decided to make a > "Libby Bong" for the task - but - I have found most of the recommended > dimensions for the bong - the one that eludes me is how long or tall to > make it. I know instructions say tall enough to be over the height of the > radiator vent - but just how tall/long/high is that? Does anyone know?? > > Bong PVC pipe - 2in. dia by "X"in long? > > Other parts -- > Plumbqwik Reducer - 2 in down ti 1-1/2 in. > Nylon tube - 1/2 dia X "X" in. long > Rubber band > Sticky/pucky to seal nylon tube to te PVC pipe. > > Thanks, > > John Rodgers > |
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