Update to Archive submit (Oops?)

[Dave Head <dhead@sundial.sundial.net>]

Got my new Thermoswitch from Blau today - Stocked under part number:
443 959 481 price 37.95. Dealer also lists under other part numbers.

Previously submitted:
>Dan, here is info for the Turbo/Turbo Quattro After run cooling system.
I've included info on cooling fan operation, since the Bentley doesn't give
much detail.
>
>The after-run cooling system for 86 up turbos and turbo quattros consists
of a relay, thermoswitch, and an electric cooling pump. The relay is brown
and under the dash at the aux panel. The thermoswitch is located right next
to the upper radiator hose at the block connection, two blade connection.
The electric cooling pump is mounted above the ABS unit, beside the injector
cooling fan system.
>Basically, when the engine is turned off, this system runs the engine
cooling fan at low speed and the cooling pump runs until the preset temp
(85C) is reached.
>Additionally, this relay turns on the low speed portion of the engine
cooling fan whenever the AC is on (Bi-Level, AUTO, DEFROST) to assist in
providing more air flow across the condensor and radiator.
>PART NUMBERS
>Relay: 447 965 571A dealer cost about 105-112.00. Blau same, Shokan 45.00
used plus shipping.
>
>Thermoswitch: 035 919 369S (old PN) or 054 919 369B. Dealer - 37.00, Blau
35.76. (this is for 87 tq - other years may differ...) Dealers have a very
hard time finding this on the microfiche.
>
>Pump: 034 965 561C Dealer - 175-186.00, Blau 160.00, Shokan used 95.00.
Chris Semple has them for 135.00 plus shipping ($143.00). 
>
>Audi 3 stage cooling system.
>Audi provides a 3 stage engine cooling fan system via a flat, 90 degree
resistor pack mounted in front of the radiator, down on the 'frame rail'.
Older model resistor pack are blue anodized, newer are gold. The older
models are prone to failure. There are also low, medium, and high speed
relays to connect the fan to the appropriate portion of the resistor pack.
>
>Low speed operates when the AC is on (some models controlled by AC
programmer, some by after-run relay), and when the engine is turned off, as
listed above.
>
>Medium speed - cycles by the setpoint of the 3 wire thermoswitch located in
the radiator (around 92C to 85C).
>
>High speed - Operates via the high pressure switch in the AC system. High
speed is not fused - direct input from the battery via the relay under the
dash. I know of no other thermoswitch control. If there is, please let me know.
>
>
********************************AUDI FAN******************************
EMCM(SW) Dave Head (nuclear grade electrician)
87 5KCSTQ 170K miles and not counting (damned VDO odometers)...
1.9 bar boost (charlie spring, no shim) - @ 1.3 the shuttle launches!
Maitland FL
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