The only engine used in a Dodge vehicle that does not have a timing chain or belt would be the Cummins diesel. The Cummins diesel uses timing gears.
The Cummins diesel does not have a timing belt.
The Dodge 3.8L has a timing chain that should last for the life of the engine. There is no service interval.
Neither, it is all gear drive timing
It has a timing chain that does not need service.It has a timing chain that does not need service.
All 2003 Ram gasoline engines have timing chains. The diesel has timing gears.
60 to 100k depending on service
If equipped, it is behind the starter.
Timing rarley get off in a diesel and I recommend taking it to a diesel mechanic if it needs done for some reason, Here is a chart that might help. http://dodgeram.org/tech/dsl/FAQ/timing.htm
"Xtreme Diesel is a company in itself. Dodge, Chevy, Ford, and GMC are some of the companies that offer this service. Cummins diesel also offers the same service."
It is below the injection pump, in the back of the timing cover.
Dodge cummins. By far