Quote:
Originally Posted by 66sprint6
Also, I’m seeing coolant collecting below the intake and valley pan. This requires further diagnosis, but I believe that it’s from the water pump gasket.
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I'm assuming that you meant under the intake but on top of the valley pan? If so, your most likely suspect is the mating surface between the water pump and intake, as mentioned above. It's a very common seepage area. I always put a smear of Permatex on that o-ring and those two passage points
at the intake coolant crossover during assembly (Being that the crossover to head mating points are another possible source if water is resting on the valley pan).
If you find the o-rinng to be the culprit, loosen the intake bolts a little before drawing that junction tight on the o-ring, then come back and re-tighten the intake bolts.
Generally speaking, when looking for a leak source, look at the highest wet spot on the engine. The leak will be above that point somewhere....