My owners manual for my 2017 3.5L AWD Titanium says the following.
“Initial replacement at six years or 100000 miles (160000 kilometers), then every three years or 50000 miles (80000 kilometers).”
If there are so many water pump failures with 3.5L engines, why wouldn’t Ford recommend earlier coolant changes if that is an easy, cost effective way to extended the water pump life?