[ford3]

the design of that oiling system for the rockers was one of the worst setups ford ever designed, there is no way to clean the passage because it goes up thru the block to the head, then it makes a 90 degree turn, runs along for about an inch between the block and head, and the it makes another 90 degree turn up thru the head and into the rocker arm assembly, its that one inch passage between the block and head where the problem starts, the heat boils and burns the oil into a heavy sludge and stopping oil flow, and as i said earlier there is no way to clean the passage because of the two 90 degree turns, why ford didnt run the oil passage straight thru the head to the rocker arms, that way it could at least could have been opened up