OEM recommends every 75k miles. I have 170k on mine and have not had a problem.
CHAIN
The 2.3 liter Dual Over Head Cam engine in a 2001 Ford Ranger has a timing CHAIN
The 2.5 L - SOHC - 4 cylinder engine available in the 2001 Ford Ranger has a TIMING BELT
On a 2001 Ford Ranger : The 2.5 litre four cylinder engine has a timing BELT The 2.3 litre Dual Over Head Cam four cylinder engine has a timing CHAIN
How much does it cost for labor to change a timing chain in a 2001 Alltima ?
On a 2001 Ford Ranger : The 4.0 liter Single Over Head Cam , V6 engine has ( 3 ) timing CHAINS
You don't. It has a Timing Chain
The 2.5 liter , 4 cylinder , has a timing BELT
In a 2001 Ford Ranger : The 3.0 L V6 engine has ( 1 timing CHAIN ) The 4.0 L , Single Over Head Cam V6 engine has ( 3 timing CHAINS )
You don't the cam runs with a chain on the Duratech engines.
There is no belt to change; it uses an internal timing chain.
the 2001 does not have a timing belt,instead a timing chain,which does not required replacement as often as belt