Quote:
Originally Posted by HighlandPete
Warm up time will not be a constant, can never be, as you say "engine loads". Then there is the ambient temperature and cooling efficiency. There is quite a bit of natural heat loss in the normal by-pass system around the engine, (even with good thermostats) during warm up. Then there is the HVAC demand, made worse at low temperatures.
I know from my own 330d you can even have temperature drop back during a proper warm up cycle. Simply due to coming off load on a long overrun, as there is just not enough waste heat to spare.
HighlandPete
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That is why I was wondering where the reference curve comes in that graph. The incline of the graph up to the stable temperature is probably just a best guess (as we both suggested that varies - so it can't be linear as depicted). But intersted in the source of the graph and whether the stable temperature (Tmax) is a fixed value from the manufacturer's data.
My temperatures are very similar to the graph posted - but probably take a bit longer to get to that temperature. Will be interesting to see how you get along, blutak.
D.