Engine swap underway-02 mountaineer with mustang heart transplant | Page 2 | Ford Explorer Forums
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Engine swap underway-02 mountaineer with mustang heart transplant

Fuel filter had something akin to mud in it. New filter and it's running like a champ!
 






SinistrV6 said:
I noticed another problem too. When the themostat opens, the upper radiator hose is being sucked flat. Wonder if that's what caused it to overheat on the previous owner?
Click to expand...

Pop the cap on the coolant reservoir and see what happens. It sounds like the water pump is being driven backwards.
 






JoshMcMadMac said:
Pop the cap on the coolant reservoir and see what happens. It sounds like the water pump is being driven backwards.
Click to expand...

It was just a bad radiator cap. Replaced it and it works fine now.
 






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