Quote:
Originally Posted by funola
You forgot about the exhaust manifold and the turbo, which is under the inlet manifold. Heat rises and you have the pump mounted at the highest point in the engine compartment above the hottest components. There are much better spots, like next to the aux water pump, away from the heat of the turbo.
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What Turbo ? No turbo in a OM617.912 engine.
Heat does rise, but I cannot see how in the world that much heat will transfer from parts A (anything which radiates heat) to part B (pump). I guess the real test is to drive it around a bunch tomorrow and get the thermogun out. I am betting 125F would be the max on the worst of a S.C. day in mid-August. Better yet, having opened the hood in the dog days of Columbia, S.C. heat after driving around a lot, I know for a fact that once I opened the hood, there was no 100+F heat wave from the engine. If I can touch a part immediately next to the pump with my hands, I have a hard time imagining that temp is 150F or more. Since there is around 4" of air space from the hottest thing possible (exhaust manifold), not sure radianting heat not in a direct line of sight so to speak could heat up the pump to 150F.
After your first post, I drove the car around to operating temp. I can hold my hand about 1" from the exhaust manifold and there's no heat wave so to speak--not even close. However, as I said, I will get the thermogun out tomorrow. Might be a good catch.
The temp gun is the great equalizer, however.