it shouldnt need to be, it was sealed fine for the first 3 or 4 years after it was rebuilt, after about 3 or 4 years i had a small amount of coolant that would come out of the front pass side bolt but would be one little dab of coolant once every month or so, here the first of this year it had gotten worse which is why i pulled the intake the first time. When i did have that small amount leak i thought the intake bolts went into the water jacket so i pulled that one and put sealant on it, stayed good for a little while but eventually that super small leak came back, ran it for another 2 or 3 years and then this year is when it started leaking worse.
