smkettner wrote:
Two pumps.... at what point do you replace both? Or do you always just replace the failed unit?
One pump.... I am thinking it might be less money and hassle to just replace the pump at about 10 years or 120,000 miles.
Assuming both pumps running as redundant units, so both have the same service life. They won't fail at exactly the same time, but they won't be far apart. So when one pump quits, you get a dash light that says you are running on only one pump. Now when you replace the pump, you'll have to replace two, since the other one is now due to fail, so to avoid double labor expense you change both pumps at the same time.
So you have increased mfg cost, doubled repair cost on the part since you now have to replace two instead of one, but prevented unexpected breakdowns.
