| Re: [GMCnet] Radiator Antifreeze Additive and Anode [message #229497] |
Tue, 12 November 2013 11:37  |
rallymaster
Messages: 662
Registered: February 2004
Location: North Plains, ORYGUN
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"steel radiator"?????
When did they have a steel radiator?
ronC
On Tue, 12 Nov 2013 09:24:00 -0700 Emery Stora <emerystora@me.com>
writes:
> Neither radiator has anodes.
>
> New antifreeze has several additives. They deplete over time which
> is why I recommend replacing the antifreeze every two years.
> (Biannual means twice a year. - I think you meant biennial. )
>
> The additives in antifreeze are corrosion inhibitors, anti-foam
> agents, rubber swell additives, and water pump lubricants.
>
> You won't find one additive that has all of that and if you add more
> than one additive you don't know if they are compatible. They might
> interact to form deposits or negate the properties of each of them.
>
>
> Just replace the antifreeze with a known brand and you know your
> system is safe.
>
> Yes, a system will corrode while just sitting -- it doesn't have to
> be running.
>
> The higher the pressure of the cap, the more boilout protection.
> BUT, the GMC steel radiator was designed for a 9 pound cap. The
> tubes are "flat" and higher pressures expand the sides. When cooled
> they flatten again. The constant flexing can cause tubes to crack.
> So don't use a higher pressure cap.
>
> Since caps are constantly opening and closing, perhaps hundreds of
> thousands of times per year of use, most caps lose their ability to
> hold pressure within about two years. So, I have a Stant pressure
> tester and find that I have to replace my cap about every two years
> along with the antifreeze.
>
> Antifreeze is getting expensive but so is the cost of replacing a
> radiator, heater core, water pump, etc. so it is good insurance to
> replace that antifreeze biennially.
>
> Emery Stora
>
> On Nov 12, 2013, at 8:49 AM, Mickey Szilagyi
> <mickey@apex-internet.com> wrote:
>
> >
> >
> > We've had our 77 Kingsley just over a year and have changed all
> the fluid except the radiator coolant. It's still clean and tests
> to well below 0 degrees but we don't know how old it is. We're
> concerned about it's anti-corrosion and lubricating properties.
> We've read that Emery Stora recommends changing it I think he says
> annually or perhaps biannually.
> >
> > We believe we still have the original steel radiator. Do both
> steel and aluminum radiators have anodes? And if we have an anode
> in ours where is it located and can we remove it for
> inspection/replacement without draining the coolant? Does corrosion
> or oxidation occur when the coach is sitting in storage or only when
> the engine is running?
> >
> > Can we add an additive and, if so, what's a good one? Do they
> really work? We realize it takes about 5 gallons of 50/50 mix to
> change it but wonder if an additive might basically do the same
> thing.
> >
> > We currently have a 15 psi cap on the radiator. Should we change
> to a 9 psi cap? What difference does this make?
> >
> > As always, we appreciate the input.
> > --
> > Mickey
> >
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Ron & Linda Clark
1978 Eleganza II
North Plains, ORYGUN
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Ron & Linda Clark
North Plains, ORYGUN
78 Eleganza II
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