In Reply to: temperature gauge going funky posted by Stan on March 04, 2001 at 01:51:38:
"If the gauge reads too high
when the engine is cold,
disconnect the connector from
the sender. Turn the ignition
on. If the needle position does
not change, the wiring or the
gauge is shorted to ground. If
the gauge needle drops, the sender
is faulty and should be replaced..."
When the engine is cold (overnight), and on a level surface:
First, loosen the radiator bleed screw;
Second, fill with coolant 'til it overflows, and tighten bleed screw (carefully!);
Third, bring to operating temp., and loosen bleed screw for it to relieve any excess coolant;
Lastly, the next day, then, top-off to Kalt line, if needed.
It might be a good idea to check the level every morning for a while to see if yours is *happy* at a level slightly below the Kalt line...Just so long as your needle isn't in the red zone, it's ok.
PS We had an overheating problem recently with our 5/98 1.9. It's funny (well, sorta), how the Service Rep. -- who helped me with the process of elimination -- described some of the Z3's components. To wit: Thermostat = "Notorious"; Radiator = "Cheap sh/t plastic that BMW uses".