wally
Guest
Do you have crankcase blowby, a miss in the engine, anything like thatIJ Knocking noises in the CDC are not generally associated with the cooling system. Once in a great while, one will break a rocker arm or the rocker arm stanchion will come loose, but this would result in a steady misfire. A failed wrist pin bushing, very rare in these engines, will give you a knock that is worse on deceleration. The most common problem is piston ring carrier deterioration. look for too much smoke_vapor out of the crankcase blowby tube.