Water Pump Maintenance

[Tom Wesenberg]

Originally Posted by Hoogah

It's kind of pressed into the back of the impeller. Is it meant to stand proud of the back of the impeller against the back of the housing, because it doesn't! I can't figure out what its purpose is.

I always use the square brass thrust washer. The two corners fit into the two raised angles on the impellor. It serves as a bearing surface for the forward pull of the fan.