Water temp#2

[Ti Kan]

ARPCAxPREZ at aol.com writes:
> Thanks to all who replied about my recent colder water temperatures...looks like the thermostat is the violator.  It must be stuck open, now my questions:
> Where is this located? ('97A4Tq)

On the 1.8T engine, the thermostat is located inside of the lower
radiator hose flange, on the bottom of the water pump assembly,
near the oil pan (just like in all VW/Audi 4 cylinder engines).

> Can I just tap the thing with a BFH and maybe the spring would close?  (fingersX)

Maybe, maybe not.

> Is it a tough job to replace
> Who's gotta good price, if I haveta buy one.

The thermostat should be an inexpensive item.  Buy a good OEM quality
unit (usually Wahler brand) rated at the right temperature for your car
(87 deg C).

> Do you think this stuck thermostat triggered my check engine light, cause it's on now.

The thermostat itself has no connection to the diagnostic system, but
maybe the fact the engine is running too cold caused the check engine
light.  You won't know unless you look at the specific DTCs (diagnostic
trouble code(s)) stored in the ECU.  You need VAG-COM
(http://www.ross-tech.com), Prodiag (http://www.shadetreesoftware.com)
or a factory VAG-1552 or VAS-5051 to get the codes.

-Ti
2003 A4 1.8T multitronic
2001 S4 biturbo 6-sp
1984 5000S turbo
1980 4000 2.0 5-sp
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