The recommended replacement interval for the timing belt on a 2001 Ford Truck with a 5.4L engine is
every 100,000 miles or 10 years, whichever comes first. However, this is just a guideline.
It's crucial to consult your owner's manual for the *exact* recommendation from Ford for your specific vehicle. The manual may specify a shorter interval depending on driving conditions.
Ignoring this recommendation is risky. Timing belt failure can cause catastrophic engine damage, requiring a very expensive repair. It's far better to replace the belt proactively within the recommended timeframe than to risk a much more costly repair later.
