It has a chain. Replace when it breaks, no maintenance interval like a belt.
Buick Regals don't have timing belts. They have a timing chain.
Engines that have a chain generally about 150,000 miles. Ones that have belts, 60,000 miles.
Your 2003 Ford Explorer Sport Trac - 4.0 L - SOHC - V6 engine has 3 timing CHAINS - 2 chains at the front of the engine and 1 chain at the back of the engine
You don't change the belt because it has a timing chain.
timing chain
It has a timing chain.
Timing chain.
Chain.
The 2001 Ford Explorer Sport V-6 has a timing belt. Ford engines have not use a timing chain since the 1980s.
What year
Yes.
The 3.4 litre V6 engine in a 1999 Pontiac Trans Sport has a timing CHAIN