I have heard similar horror stories on the past... and I have seen some pretty
nasty crud
buildup lurking behind the freeze plugs on engines I've disassembled. Good
incentive to do
a thorough back-flush on your cooling system every couple of years.
Gary
Fred_Katz@ci.sf.ca.us wrote:
> Gary,
>
> A very eloquent response, couldn't say it better myself because too much
> painting in past years clogged my brain synapses.
>
> In regards to "just background noise in a properly sized engine cooling
>system"
> - when I rebuilt my 2000 engine I had the engine block hot-tanked. After
>picking
> it up from the machine shop I was shocked to find some casting debris in the
> water jackets of the block. Several long chunks of metal were in there, who
> knows how long, there were no newly broken edge surfaces on the pieces so it
> didn't seem likely to have broken off during the hot-tanking. I managed to
>fish
> them out, and have not encountered any problems after finishing the rebuild.
>
> If any of you are having cooling problems, it may not be your radiator causing
> the problem. The radiator is just one component to investigate.
>
> Fred - So.SF
> BADROC
> http://albums.photopoint.com/j/ViewPhoto?u=1420039&a=10625923&p=37710781
>
> _________________________ Reply Separator
> Subject: Re: Radiator rebuild
> Author: Gary McCormick <svgkm@halley.ca.essd.northgrum.com>
> Date: 1/12/2001 2:52 PM
>
> This issue was discussed at some length here on the list a while back. There
>are
> complex
> thermal issues involved - the transfer of heat from the radiator to the
>ambient
> air is
> affected by the amount of total surface area (how many rows), the surface
>finish
> (how
> smooth or rough the surface is) which also affects surface area; the surface's
> color
> affects radiant heat transfer - it gets pretty complicated pretty quick, but
>the
> bottom
> line is that there is plenty of margin built in to radiator design, and unless
> you clog
> the cores with paint, a little paint on the thing is not going to affect you
>too
> much one
> way or another. The difference in the radiant heat transfer rate from a
>painted
> radiator
> surface as opposed to an unpainted radiator surface (shiny new, or aged to a
> nice dark
> patina by atmospheric pollutants... ) is probably not all that much. If your
> design is
> that finely drawn it would be better to just chuck it in and go up one number
>in
> row
> count. All those surface finish effects are just background noise in a
>properly
> sized
> engine cooling system.
>
> Gary McCormick
> San Jose, CA
>
> Fred_Katz@ci.sf.ca.us wrote:
>
> > Sorry to disagree, but painting mine didn't affect cooling at all. It's the
> > core that does all the cooling, not the outer case. As long as you spray a
> > fine mist towards the core to lightly place a tint of the black color, and
> > don't soak it then you won't get any adverse results. The outside case can
> > get heavy coats of paint.
> >
> > My engine runs cool, even in 100 plus temperature days and heavy loads.
> >
> > Fred - So.SF
> > '66 2L
> >
> > ______________________________ Reply Separator
> > Subject: Re: Re[2]: Radiator rebuild
> > Author: "Patrick P. Castronovo" <slick1@mohaveaz.com>
> > Date: 1/12/2001 1:47 PM
> >
> > Painting your Radiator cuts down on the cooling. Painting it does not cut
> > down on the rust, as it usually rusts from the inside-out. I no longer have
> > my radiators painted
> > ----- Original Message -----
> > From: <Fred_Katz@ci.sf.ca.us>
> > To: <az589@lafn.org>; <mickth@hotmail.com>;
> > <datsun-roadsters@autox.team.net>; <CalSpeed@aol.com>
> > Sent: Friday, January 12, 2001 11:39 AM
> > Subject: Re[2]: Radiator rebuild
> >
> >
> > > Same here, I paid the same for a 3-row, always ran cool. But I called
> > > around for estimates and the prices varied from $130 to $250 in the SF
> > > area. $150 is very reasonable.
> > >
> > > Note: you can save money by painting it yourself. I got that tip from a
> > > radiator shop guy, and he told me their paint is cheap low quality paint
> > so
> > > it's better to do it yourself.
> > >
> > > Fred - So.SF
> > >
> > > ______________________________ Reply Separator
> > > Subject: Re: Radiator rebuild
> > > Author: CalSpeed@aol.com
> > > Date: 1/12/2001 2:19 PM
> > >
> > >
> > > In a message dated 1/12/01 6:16:03 PM !!!First Boot!!!, az589@lafn.org
> > writes:
> > >
> > > << I recommend a 4 row core if you plan to recore the rad. >>
> > >
> > > Wow... a four core? Maybe in the SoCal Traffic jams in 100 degee heat.
> > ;>)
> > > I run with a three core here in SF with temps at around 60-75 year round.
> > > Except now of course. I paid $130.
> > >
> > > Calspeed
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