Trying to find a coolant leak at the driver's side rear of the engine. Seems to only leak when it's cold. Changed the water pump thinking that the coolant was running down the engine cradle. Purchased new heater hoses but haven't installed them yet due to the difficulty in access. I have heard of engine block porosity leaking into the cylinders but never a leak facing the outside of the engine. There isn't much viewable in the back of the engine even with a light and a mirror. I am almost at the point of dropping the whole subframe with engine and tranny attatched in order to find the problem. Thanks.

 

what engine
coolant crossover gaskets were common on 3.9

 

It's a 3.6L.