Cat 3116 , Recently cleaned out my heat exchangers by removing the supply hose at he inlet and I was able to get out about 2/3 of a impeller worth of blades --- from each engine. Wow !!!! Now I am wondering what's in the oil cooler ! And in the westerbeke 8tbd . Anyone know how to access the oil cooler ? Will I loose the oil if I remove a end cap., Also on the generator heat exchanger , when the end clean out cap is removed , will I loose the coolant ?