Composite or metal water pump impellers?

[itskenallen]

Originally Posted by JFP in PA

Get the composite impeller pump.

Could u elaborate on this a bit please?
The pump I received is manufactured by GEBA and apparently has uprated bearings.

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[JFP in PA]

Originally Posted by itskenallen

Could u elaborate on this a bit please?
The pump I received is manufactured by GEBA and apparently has uprated bearings.

Sent from my Galaxy S8+ using Tapatalk

When the bearings go bad in these water pumps, and they all will go bad regardless of who makes the pump, the shaft starts to move side to side resulting in the impeller hitting the front of the engine case. With a composite impeller, the impeller breaks up, which can cause cooling system blockage if you don't flush all the bits out. If the impeller is metal, it starts machining away the engine case, which also fills the cooling system with fine metal which is a royal pain to get out, but it also permanently enlarges the clearance between the pump impeller and engine case, resulting in permanently reduced coolant flow regardless of which type of pump is used, and ongoing cooling issues.