3-Series (E21, E30)Chat relating to the BMW 3-Series from 1975-1983 and 1984-1991 line. Specific models: BMW 315, BMW 316, BMW 318, BMW 318i, BMW 320/4, BMW 320i, BMW 320/6, BMW 323i, BMW 320i. E30 Family models include: BMW 325e, BMW 325i, BMW 325is, BMW 325ix.
My e30 had the same issue Normally it is the sensor has gone bad there cheap to replace...
__________________ 1991 Ford Taurs SHO 5 Speed White on Tan
1996 Chevy Lumina LTZ Rep 3.4L
1992 318i Coupe parts car
1992 325i Ls1 swap with a T56 6 speed 12.2 quarter mile
1976 Mercedes Benz 300D with a Ford 5.0L Fuel Injected soon to be Modded I am Captain Obvious
what I do is fill the coolant resevour a little at a time while the engine is just a little bit warm, so that the cap comes off without spraying stuff all over the place but keeping the thermostat open...there's a point in there where you have both conditions...then I top the coolant off a little bit at a time and squeeze the radiator hoses one by one until no squishing sound. I always see the coolant level in the tank lower, then I add more coolant and do it again...eventually the system is stocked......button it up and there you go...good luck....
whatever, the only thing that trips the telltale lamp in the cabin is the cap on the overflow/filler tank.....that's it....try tapping the plunger on the cap and see if doesn't release....just a guess, but's that only thing that triggers that light...now...if the temp gauge runs high that's an issue.....
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