Originally posted by DIIRTY-30
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What I then did was placed another brand new brown e30 sender in a pot of hot water an measured it's temperature using an infrared thermometer and recorded the ohms vs. temperatures .
What I found that the stock e30 temp gauge when using e30 sender will read past 1/2 mark for the operating temperature of the m6x as these engines run hotter than e30 engines.... obd2 engines run hotter stock for emissions.
When my e30 cluster gauge was showing at or almost 3/4 mark I used my infrared thermometer to check the temperatures at the water pump, the coolant pipes, top of the radiator and rear coolant pipes and have not seen temperatures higher than 210f.
e30 cluster will read on the high side for 210f, but the stock e32/e34 clusters with their matching temp senders for these engines will not read as high.
Just sharing what I've learned by doing some measurements and readings. I've since purchased a stand alone vdo vision temp gauge and sender that I've yet to install for peace of mind (and same for engine oil temp).
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