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Old 12-01-2012, 09:16 AM   #11 (permalink)
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No I never have seen a such picture Wow ! Thanks for my education! Do you know how old this pump was? The owner must have used acid for coolant. Yet I still think the thermostat is the culprit.

Last edited by twiggy144; 12-01-2012 at 09:19 AM.
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Old 12-01-2012, 11:06 AM   #12 (permalink)
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Would be a good time to back flush heater core when you change thermostat. Make sure the anti freeze is 60/40 -50/50 for winter. Use the Motorcraft Thermostat. Jiggle valve up^
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Old 12-01-2012, 08:13 PM   #13 (permalink)
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Quote:
Originally Posted by twiggy144 View Post
No I never have seen a such picture Wow ! Thanks for my education! Do you know how old this pump was? The owner must have used acid for coolant. Yet I still think the thermostat is the culprit.
It's caused by lack of coolant maintenance. Once the coolant breaks down the engine starts to rust from the inside out. The severe erosion on the water pump is usually a combination of corrosion and abrasion from the rust particles in the water (they act like sandpaper).

You can read about that particular case here: 99 Taurus Overheating
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