Small drops blowing from bottom of water pump when engine is running. Lowest water pump bolt is wet with anti freeze and I have tightened it but it still blows small drops. Do you think it is a bad gasket or is the pump leaking? What happens when a pump goes bad, a shaft seal leaks, a bearing leaks? If I replace the gasket, should I also replace the pump as long as I am that far into repairs? Really don't want to replace parts that are ok. Thanks for your input.