Engine overheating
Can old antifreeze cause the engine to overheat. The tester shows that it is still okay for minus 45 degrees celsius.
Forum Discussion
Diesel engines tend to heat up more than gas ones. If the hill is long and "sloping" it might increase by 20 degrees or so but not into red. Downshifting helps anyway on long, steep hills for all engines. I had a V10 which overheated on long hills.Certainly, a well maintained cooling system helps a lot. In my experience all/all engines heat up on long hills and even though people say NO, it happens. My 5 series BMW oil temp gauge(no water temp on them) goes up on the long and steep Cocquihalla highway to Kamloops BC.
