I'm looking for some help in diagnosing this grapefruit tree for a friend. Sentimental value and the fruit is very good regardless of the structural issues with the cavities in the trunk (common in older citrus trees). I found several places where a clear sap was oozing out of the bark with no visible holes. The sap was hard and crystallized with no distinguishable odor. Lots of small deadwood in the crown and I noticed some of the sap at the branch collar of a couple dead twigs.