Have you checked if its a belt or a chain?
left hand thread i had to take mine off on my 1993 2.4 frontera hope this helps
On a Vauxhall Cavalier Ecotec 2.0L, the timing marks are located on the front of the crank pulley. It is marked under the cam.
Remove bolt, and use a harmonic puller to remove pulley.
Help in setting a cam belt pulley
You can remove the old serpentine belt on your 2004 Dodge Ram by loosening the tensioner pulley. Put the new serpentine belt on and tighten it with the tensioner pulley.
Which pulley?
The tension pulley should have a bolt that holds it on, allowing you to replace the unit.
Remove the old, damaged idler pulley and replace it with a new one.
Bottom left of engine near the pulley wheel
replace the pump
replace 1996 nissan 200sx se 1.6 tension pulley
Bottom left of engine near the pulley wheel