Vehicle Questions and Answers
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As per the automaker, the 2001 Ford F-150 came with a plastic intake manifold, making it probable that you may encounter a coolant leak in that area during the truck's lifespan. The leak is a result of a manufacturing flaw, leading Ford to introduce an improved engine version, dubbed the "PI" version, which has a metal coolant passage on the front of the intake manifold. Unfortunately, if the leak is serious, your best option is to replace the faulty part with the updated one. However, this process is quite complicated, so seeking help from a professional mechanic would likely be a better choice if you need assistance with it.
Certain signs like a lit-up check engine light, inconsistent engine behavior, oil and coolant leaks, decreased fuel efficiency, and stalling could indicate issues with the intake manifold gasket. Engine performance could suffer due to a faulty gasket for this part. It is recommended to have the vehicle towed to a repair shop promptly if such symptoms occur to avoid exacerbating any existing problems.