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Q:

engine manifold leak on 2001 Ford Explorer

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
Is the manifold made of plastic. I have to keep adding coolant every hundred miles and was told it is not the thermostat but that the manifold is made of plastic and it becomes warped and a repair will cost over $1200.
(1) Answer
Yes the manifolds are plastic manifold and they commonly leak. And $1200 is abut right, sorry to say. But get a second opinion on the leak, because they usually run poorly or set a Check Engine Light, I have not heard of many leaking coolant, so make SURE the manifold is the source of the coolant leak, have someone pressure check the system and then SHOW the place on the manifold where it is leaking.