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International Automotive Technicians Network
Re: Ford 4.9 oil in coolant
Posted to Technical Discussion Forum on 8/30/2024

Hi Larry,

I am in agreement that the cooling system needs to be pumped up and left sit overnight, but pull the spark plugs and check for coolant seep into one or more cylinders. Coolant will migrate past the rings when left sitting.

At this age it is highl... Login to read more.