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Originally Posted by blue2000s
I'd rather not have little pieces of water pump vane floating around in my coolant lines.
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Here's the info from Pelicans discussion from 2 who responded. Just FYI info.
The gasket is a coated steel gasket. No doctoring required or recommended.
1) Water pumps are truly hit or miss- one may last 100k, one may last 10k.
A new pump may fail before the one currently in the car.
Usually they give you plenty of warning by the weep hole. Inspect inspect inspect.
Sometimes you get even more warning by the bearings growling.
Rarely they fail w/o any warning.
I would rate a water pump 4/10 in difficulty. Without a lift to get under the car, may want to revise that to 6/10.
2) OK I will take a stab at it. Since our coolants are silicate free wear on the impeller should not be an issue. If the shaft seal begins to wear it should start dripping or maybe squeaking and you will most likely smell some coolant. Yes it could just seize up and the belt flip off, or the impeller shear from the shaft, but what are the chances. Unless you have some real mean time between failure data I would leave it alone. At least this one is a proven item. Right out of the box is the highest failure probability there is until you reach some mid time service life. And we do not know what that is. At least I do not know it. You can bet Porsche knows it, but we will never ever see those data sheets. I had a friend who had a car with a water pump that began to squeak. He purchased a new one and put it in the trunk, just in case. He sold the car with 350,000 miles with the new pump in the trunk.
I think that is called a scare tactic.