Over heating -- followup and question

[Leroy Eckert]

Pete: I am not going to paint anything that was not painted prior to cleaning.
Don't want to screw up. I can see and feel the water radiator(copper in color,
previously painted black) on my coach from street side as well as the fan side.
The fan side is more difficult. In front of the water radiator street side is
the a/c condenser on top and below some kind of oil cooler. It's tight but I
can place my hand between both of these units and the water radiator street
side. Both units are aluminum. Perhaps it is a charge air cooler. I was going
to trace the lines on that unit today but was unable to do so because unfriendly
fire ants were in the area. Is the charge air cooler associated with chassis
air? I'm not familiar with the term. Thanks for the help.

Leroy Eckert
1990 WB-40
Niceville, FL





----- Original Message -----
From: Pete Masterson
To: WanderlodgeForum@yahoogroups.com
Sent: Sunday, September 10, 2006 8:24 PM
Subject: Re: [WanderlodgeForum] Over heating -- followup and question


What you see when you open the "grill" is the "charge air cooler". It
is aluminum and is silver in color. It is _not_ the water radiator.
Do not paint it. The water radiator is behind the charge air cooler
(and not visible from the street side). You can see the water
radiator from the inside. It should be black in color if you can see
any of the original paint under the grime that coats everything in
the engine compartment. If you have chassis air conditioning, the AC
condenser will cover the bottom 1/3 (or so) of the water radiator.
AC condensers are also (usually) made of aluminum and are not
painted. The water radiator is often made of copper or copper alloy
and is painted to protect it from corrosion. Aluminum is often left
unpainted as many aluminum alloys are 'naturally' protected. (Looking
at 2 automobiles, 2 wall AC units in my house, and 3 AC units on the
top of my 'bird, none of them have the aluminum condensers painted.
There must be a reason that probably does not have anything to do
with "black body emission.")

Pete Masterson
aeonix1@...
'95 Bluebird Wanderlodge WBDA 42'
El Sobrante, CA

On Sep 10, 2006, at 4:41 PM, Leroy Eckert wrote:

> David:
> Thanks, seems reasonable. After Pete posted his problem I checked
> mine out even though I do not have overtemp problems. The last
> time I cleaned my the radiator was 18,000 miles ago. I washed it
> out this weekend and was amazed at how much black water came out
> of the oil cooler, condenser and radiator. The bus gets dirty with
> road film from the rain and all of that crud is sucked into the
> radiator by the fan. I will repaint my radiator black next
> weekend. The condenser and oil cooler are not painted?? Any ideas
> on that???
>
> Leroy Eckert
> 1990 WB-40
> Niceville, FL
>
>
> ----- Original Message -----
> From: David Brady
> To: WanderlodgeForum@yahoogroups.com
> Sent: Sunday, September 10, 2006 5:26 PM
> Subject: Re: [WanderlodgeForum] Over heating -- followup and
> question
>
>
> They paint them black for the same reason that disc brake
> calipers are painted black - heat radiation. Everything radiates
> heat in the form of electromagnetic waves (energy). The ideal
> is Black Body Radiation. The emissivity of a painted black
> object radiates more like an ideal Black Body than other painted
> colors.
>
> David B
> '02 LXi Smokey
> Va

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