I had been trying to find the cause of erratic behavior in the temperature gauge on my ’73 BMW 2002. The needle jumped about randomly and would
Here’s a fix that should be done on your car even if you don’t have any such electrical problems, just to forestall them.
Erratic temperature gauge and signal indicators may be caused by the small ground strap to the chassis of the car being broken.
An independent circuit can make your engine run about 15 degrees cooler.
Running 100% antifreeze is not the answer to better cooling.