Originally Posted By: dnewton3
Overall very good engines; they wear well. No special lube needed.
The Achilles heel is the water pump's location; tucked inside the engine and driven by the timing chain. About a $1500 job to R&R. If it leaks internally, coolant will pervert the lube and scrap an engine if left unchecked. For this engine, once it gets to 100k miles, I would either starting doing UOAs every 5k miles looking for coolant, or just bite the bullet and pre-emptively change the water pump. Some pumps have gone as far as 150k before needing replacement; others not near that long. No oil, regardless of base stock, viscosity, etc will stop this problem; lubes cannot stop mechanical design issues from manifesting into a problem at some point.
That's interesting to know. How do engineers not foresee these glaring design issues? (a $1500 R&R every 100K or less, because of poor design is ridiculous, IMO.)
Does the 3.0 Duratec used in older Fusions have this same (poorly) designed waterpump placement?....how about the 2.7?