Heater valves

[Kneale Brownson]

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Has anyone determined why Audi chose to use an all-plastic heater valve in
a coolant system that includes a half-plastic heater core and a
half-plastic radiator?  Maybe the all-plastic heater valve had some
advantageous property like non corroding up and fouling the coolant?  I
don't know, I'm just asking.  Since the plastic valve costs about the same
as a tankful of gas, I'd think that changing it every six or seven years,
maybe with every other coolant flushing, would not be an inappropriate
expenditure.


At 04:52 PM 11/19/2001 -0500, Mark Woodland wrote:

>After the heads up on the heater valve issue, I cruised on down to Autozone
>for two, for Max and Gina. ('87 and '86 5KTQs)
>Turns out one was all metal and the other was half metal, half plastic.
>Both had the same part number.
>I got the metal, and left the conglomerate..
>Moral: open the box and check before buying.
>Or, better yet, call ahead and have them check it out.
>Does anyone have any input/data on the half metal/half plastic?
>best regards, and, as always, thanks to the list.
>Mark
>
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