Originally Posted By: sleddriver
Originally Posted By: 02SE
It was clearly severely neglected. But to your claim of coolant lubing the water pump bearing. That is simply wrong. Modern water pumps have sealed, lubricated spindle bearings. If coolant (or the rust laden acidic mess coursing through the cooling system in this case) reaches one or both of these bearings, that means a seal has failed. Once a seal fails, contamination will destroy the bearing(s) in short order.
Fair enough.
I thought they were completely sealed. However read something recently from Aisin that stated not to ever turn a WP rotor before installation. Thought that odd. Never heard of that before. So I concluded it might have something to do with needing coolant.
Obviously the seals, then the bearing failed on this one. Pure neglect.
You are right about Aisin pumps. You can google and read the Aisin warning.
Originally Posted By: 02SE
It was clearly severely neglected. But to your claim of coolant lubing the water pump bearing. That is simply wrong. Modern water pumps have sealed, lubricated spindle bearings. If coolant (or the rust laden acidic mess coursing through the cooling system in this case) reaches one or both of these bearings, that means a seal has failed. Once a seal fails, contamination will destroy the bearing(s) in short order.
Fair enough.
I thought they were completely sealed. However read something recently from Aisin that stated not to ever turn a WP rotor before installation. Thought that odd. Never heard of that before. So I concluded it might have something to do with needing coolant.
Obviously the seals, then the bearing failed on this one. Pure neglect.
You are right about Aisin pumps. You can google and read the Aisin warning.