mike01 wrote:The bad news is upon removing the motor to install the new mounts, I found out that my pump developed a small leak as there was some corrosion at the interface between the pump and motor. The motor seems to be fine, fortunately, but it's looking like I'm going to need a new pump. I guess it's better that I found it before the motor was ruined as well.
Good catch; also lucky. More typically, based on my experience and the anecdotes of others, the leak would continue silently, until one day you would notice the machine getting slightly louder, at which point you would be doubly screwed: by both a bad pump and a ruined upper motor bearing. In my case, the insidious aspect was that, other than a slight and externally invisible leak, the pump was completely asymptomatic: it was the growing noise of the corroded motor bearing that gave it away, and by then it was too late to save it. This was diagnosed by decoupling the pump and running the motor alone, which reproduced the same metallic ringing/grinding sound. My guess: if your "corrosion" is whitish scale or oxidized aluminum from the motor housing, your bearing may be fine. But if it's reddish (iron rust), it's likely the bearing is affected, which will shorten its life, perhaps drastically.