What caused my engine to seize on a 2004 ford explorer?

Asked by Apr 07, 2018 at 10:08 AM about the 2004 Ford Explorer

Question type: Maintenance & Repair

As I was driving there was a loud knocking sound
coming from under the truck... grew louder and
faster as I accelerated. Then it got even louder
followed by a loud pop that sounded like an
explosion under the vehicle and then it
stalled/seized. I turn key, it has battery power, but
won't even crank.  

2 Answers

299,445

Possible piston rod. Low oil level or pressure will contribute to accelerated engine wear. But don't bother trying to start the truck. You going to need another engine. If you like the truck, find a low milage used engine to replace it with.

23,920

The engine is blown, period. You'll need another one. Is it a 4.0 V6? If so and you decide to replace the engine make sure you get one specifically for the 2003 model year. The 4.0 engine was used for many years. There were probably a dozen or so modifications made to the engine over the course of it's use. Internal parts of those engines are not always interchangeable. Any repairs down the road could give a mechanic fits if he believes he's working on a 2004 engine when it is not.

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