Motorcraft orange10/29/2023 ![]() ![]() The cooling system is designed as a sealed system with a flow through Degas bottle to help burp the system, which could lend itself to the use of a small inline filter at the pressurized feed line to the Degas bottle.įor comparison purposes, and due to the longer history of the vehicle/engine, we will look at Ford's coolant recommendations for the Taurus which uses the same drivetrain as the Flex and followed the same coolant recommendations. I am also interested in recommendations for a coolant filter for this engine in case some of the damage could have been caused by dirt particles in the system (casting sand, rust, etc.). I want to avoid another water pump failure, with now about 40k in the new engine, and I am specifically interested in fact based recommendations for coolants that will have the best odds of preserving the water pump seal (both compatibility and lubricity) for these Ford engines. When this happened to me, I suspected that the premature water pump seal failure could have been caused, in part, by a change by Ford in it's coolant recommendations starting in mid-2009 from their Motorcraft Gold to the Motorcraft Specialty Green coolant as shown in this application chart: This is the second engine in the car (remanufactured engine by Ford) as the original engine was destroyed due to catastrophic failure of the water pump dumping coolant into the oil pan (it's chain driven for anyone not familiar with the design). I have 2010 Flex with the 3.5L Ford Ecoboost engine. I could use some help for coolant suggestions.
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