I have 2010 3.7L MKS. Trying to find specifics on changing coolant. Dealer price seems really high for something I've done many times myself. And searching I find nothing specific to this auto. But have found videos of other engines relating to 3.5L & 3.7L Duratec. Is my engine the Duratec?
What I've seen is nightmare videos relating to the water pump because it is timing chain driven and becomes a very expensive issue to repair. Very labor intensive and if not caught early on it can involve replacing a lot of parts besides the water pump!!!
And if that is not confusing enough there does not seem to be a known cause for the pump failures. Some might guess type of coolant. Some guess not changing oil at minimum requirements. And Ford seems to be very confused about what is the best coolant.
My vehicle has yellow and supposed production was DEC 2009. Per chart mine should be Dark Green. Ford was apparently using four different colors. Also over the years there have been law suits over coolants not doing the job and mixing is supposedly a major problem. Even after a major flush because of residuals. Blamed for ruining head gaskets even. I have to question Ford engineering because coolant in oil had been a troublesome issue going back to the 80's in Taurus lineup with 3.0L. The source was totally different but still getting in oil. Around 100K miles you could expect the oil pan gasket to pop out at the front of the motor and directly above was the water pump. If the pump started dripping the gasket would act like a scoop to catch the coolant putting it in the pan. WTH?? Designed a new twist to an old problem? Seems to be true with GM as well.
With all the advertising of what is best it now appears Ford does not know.
How to? Which? And any other pertinent information please.