96 328 cab overheating
Ive read all the threads on overheating here and in the manual, so I think I know the problem/answer, but I thought I'd check with the car detectives to seeif there are clues that can save me time and money.
some months ago replaced the cap on the expansion tank as was losing coolant. Months of delightful, top down driving followed ( yeah!!) LAst week I inadvertently "red lined" (RPM) the car in second gear overtaking - no problem - car ran smoothly for another hour or so. as I arrived near home the temp gauge went into the red. Pulled over and let it cool a bit then coasted home. steam around everywhere. Seemed like the cap wasnt on tightly. Topped up with coolant. ( didnt bleed) next day after a mile or so temp gauge in red again so coasted home. rad and hoses cool, engine hot. no apparent leakage.
\engine oil is not milky coolant isnt oily so far as I can tell, car starts and runs beautifully.
Questions: Seems like a jammed closed thermostat? Did thew "red lining"incident have anything to do with this or is it coincidence? what does the evidence suggest? Was it just failure to bleed after first top up after loose cap incident?
Before I start stripping to get to the thermostat, would appreciate sage advice.