Quote:
Originally Posted by 4GIVEN
Well, I had an oil change done and I noticed that my coolant was a little low and I had the oil tested at my local cat dealer and it came back positive for coolant. The guy there told me that the water pump was the main culprit for the coolant in the oil. My engine was just overhauled about 30k ago. I was just starting with the water pump.
I can't remember specifically with the c12, because i haven't worked on a lot of them... but, in 99.9% of cooling system water pumps, there is an airspace between the cooling system and the crankcase where a weep hole will leak coolant 'on it's way' to the oil side of the engine.
Therefore... it has to pass through; the coolant side seal, then across an open airspace (where it should leak out onto the ground), and then through the oil seal on the opposite side of the weep hole area.
...not a typical failure. Unless the weep hole is plugged, or there is some sort of flaw in that coolant pump mounting that i'm not aware of as a problem, which is also possible ; )