I own a 2010 Ford Fusion with 8000 miles and I have been hearing a waterfall sound when I start the car in the morning. Being a Supra owner when I heard the waterfall sound my first thought was air in the coolant system ... WTF. Well it turns out that I am not alone. Other Ford Fusion owners with 2.5 Ltr. engines are experiencing this same problem and Ford has yet to resolve the issue. Ford has purged the cooling system several different ways with no fix. One owner had his HG replaced but the sound is still there. Another member had his entire engine replaced because the Ford Engineer claimed there was "porosity in the block and head". I am posting some facts below in hope that someone might have a suggestion on this problem and a .mp3 file of the sound. The link to the forum is also posted below if anyone wants to read up on it. Any suggestions or ideas would be greatly appreciated and I will forward them to the forum. Thanks for your time.
WHO
Ford Fusion Forum Sloshing sound.
MP3 of waterfall sound.
1. Coolant flow sound happens when colder (< 25F) outside than when warmer (40F >).
2. It happens more on startup and initial acceleration. It can reoccur when taking off after idle for 30-60 seconds.
3. There is no overheating.
4. There is no loss of coolant
5. There is no steam in the exhaust.
6. There is no change in engine performance. (no missing, loss of power or MPG)
7. There is only nominal pressure in the coolant recovery tank at normal operating temperature. (low coolant pressure)
8. The cooling system has been through one cycle of purging according the the Ford recommended specification with no change.
9. The noise is less pronounced after driving it at highway speeds for extended periods (2+ hours), but becomes louder and more pronounced after 2-3 days (50-100 miles)
WHO
Ford Fusion Forum Sloshing sound.
MP3 of waterfall sound.
1. Coolant flow sound happens when colder (< 25F) outside than when warmer (40F >).
2. It happens more on startup and initial acceleration. It can reoccur when taking off after idle for 30-60 seconds.
3. There is no overheating.
4. There is no loss of coolant
5. There is no steam in the exhaust.
6. There is no change in engine performance. (no missing, loss of power or MPG)
7. There is only nominal pressure in the coolant recovery tank at normal operating temperature. (low coolant pressure)
8. The cooling system has been through one cycle of purging according the the Ford recommended specification with no change.
9. The noise is less pronounced after driving it at highway speeds for extended periods (2+ hours), but becomes louder and more pronounced after 2-3 days (50-100 miles)
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