I see plenty of threads about the drivers who own the 603 getting overheated. I've yet to see a single thread where the actual 603 engine overheated (with the proviso that the belt and water pump remained functional and the engine didn't run out of coolant).

Yes and you will never run out of fuel if you keep filling the tank up. Obviously (at least to me) the car will never over heat if every component of the cooling system is kept up, but that's not always the case or all those engines would still have #14 heads on them.

What I'm trying to achieve as aaa pointed out is a baseline for other folks with these engines that don't have all their cooling components in working order. If you are seeing 95-100°C in conditions where most others are running at 80-85°C, then you might want to sort that out before you head over Loveland Pass with the A/C set at 65°F!

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1987 300TD 309, xxx 2.8.2014 10,000 mile OCI


Be careful of the toes you step on today, as they may be connected to the ass you have to kiss tomorrow. anonymous

“Be who you are and say what you feel, because those who mind don’t matter, and those who matter won’t mind.” Dr. Seuss

I'd like to find just ONE OM603 that actually overheated from the exact conditions that you describe above. Again, with the proviso that the belt is intact and the coolant level is maintained.