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 ...

Ford's EcoBoost engine is one of the most ... which included coolant leaks, a fault with its exhaust manifold, boost-pressure leaks, wastegate canister failure, intercooler heat-soak issues ...