Originally Posted by andyh1956 (Post 7697046)

The reason I said the engine could be sludged up is cause if the oil can't drain down from the rocker area then when it gets to a level above the valve GUIDE then it will run down the valve STEM into the intake area of the head or into the exhaust. Also, when this area is sludged up the PCV cannot evacuate the blow by in the crankcase & excessive pressure builds up. Very few bolts to remove to check this, and there is ALREADY a rocker cover leaking! 283s are old enough to have been run for yrs with non detergent oil!