While still excellent truck engines, some years of the Ford Modular 5.4-liter V8 are known for leaks where the exhaust manifold meets the engine. It can be caused by rusty bolts and studs ...

Bolted directly to the engine block, the exhaust manifold is the first section of a vehicle’s exhaust system. It funnels exhaust gases from all the cylinders and routes them to the car’s ...