overheating problem one side of engine .i have pulled manifolds and risers water flows freely,they are 2 years old,replaced thermastat,replaced impeller and entire housing,gaskets,and seals.replaced circulating pump and gaskets.pulled drain plugs from lower side of engine flushed with fresh water.noticed some scaling and sand ,flushed until water flow appeared steady and clean.not sure what to try next other than new engine.
