a new low?

[sphelps]

Originally Posted by cwickham

its not gonna run much hotter i dont think... its still surrounded by cold water and should run well under the acceptable operating temperatures.

Well not exactly, the pump is designed with fins to increase the surface area and therefore the heat exchange allowing the pump to run cooler. I can guarantee the company wouldn't spend the extra money on manufacturing if they didn't feel this feature was necessary. The covers you have installed prevent water flow around the pump, yes water will be there but it will be trapped reducing the conduction cooling effect the pump may require. It will run significantly hotter, which will likely lead to premature failure.

Often these pumps are noisy because the run too hot, the impeller gets warped from the heat and becomes unbalanced. This is why some people will say their quiet one is quiet and others will say the opposite.

You've created a temporary solution to reduce vibration noise but it may cause bigger problems than it has solved.