427 SO overheats and loses water

[Michael C Henry]

If you have the bolt on the cooling pump problem solved you can move on to other problem caused when temps went too high. If you think you may have a leak into the valley or else where start with a Stant pressure tester . Not verry expensive and can be stored in a neet litle case. Pump up pressure on a full cooling system and watch for pressure to fall. One thing I'm real concerned about is that little hose in between the intake manifold and coolant pump. I had a 460 have all sorts of problems caused by that hose . It has a blister on the inside. Not appearent from outside but the blister would grow and stop any circulation flow. When cool the blister would shrink .But when hot it would swell stopping circulation flow .Hot coolant would stack up untill the coolant temp at the thermostat would open violently. It would blow the coolant out of the recovery tank. Hard to tell what the temperatures at the cylinders got to. Normally coolant ( small quantity)would flow out of the manifold into the pump and back into the block keeeping all the coolant in the engine at near the same temperature untill the coolant temp was high enough to open the thermostat.