[tegreen]

1990 chevy pickup, changed the water pump and new hose. Trust is still over heating. No heater or a/c. What could this be caused from? Little money and not sure what to do.

[TxGreaseMonkey]

Try reverse flushing the radiator and heater core. If the problem persists, the radiator may need replacing, due to phosphate scale blocking many of the internal passages. Afterwards, refill with a 50/50 mixture of the proper antifreeze and distilled water. Never use tap or well water in cooling systems, due to the high mineral content.