The 1.9 cooing system is not as resilient as the 2.1 set up. You do not
have to either system 100%. If enough liquid is in the system to get good
flow, any air will work its way out through the expansion tank after a
number of heat-cool cycles. The real trick to bleeding is to d it with the
engine cold. You should open or relieve pressure once the engine is warm.
Warm cooling will vaporize quickly and you will really be venting vapor
not air and this can also cause uneven surface temperatures in the heads
on sides of the cylinder liners. Engine damage here we come.

Dennis

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
Michael Elliott
Sent: Tuesday, October 23, 2007 5:59 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Re: Home Made version of "the easy-bleed" for de-airing your
van's rad.

On 10/21/2007 11:00 AM Geza Polony wrote:

> Funny, I've never had any need to bleed the system, even after doing
coolant
> flushes, changing water pumps, etc. It just seems like you fill it up,
drive
> it around a bit, put more in if necessary, and that's it. Is there
something
> I'm missing?
>

This is a good question. Renegade air bits will accumulate at the top of
the radiator, it being the highest point of the system, yes no? If a liter
of air hangs out up there, will it affect cooling? Maybe it expands more
than the coolant when hot and forces more coolant into the coolant
recovery tank* than would otherwise go there?

===
* See Jim? I'm teachable!

--
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