[jokerstime]

Ok, I have an engine knock, from a suspected water pump, replaced water pump, same knock. Take the belts off, no knock .Belts back on knock. I used a copper pipe, I don't hear any knock anywhere unless I am just standing there. Not on the heads, water pump, alternator, power steering pump, oil pan, no where. Noise goes away on higher rpm, engine runs fine, drives fine. Could it be a cheap, bad, new water pump? Neither leaked. Pontiac 1970 engine. Only the new pump had a small amount of play in pump shaft. Thanks regardless. mike