I need to replace the timing chain on my 98 Dodge Dakota 3.9L.
When looking at timing chain sets, there are about three different price points: $60, $170, $250. In the $170 and $250 sets, a needle thrust bearing is included and I assume that means the cam sprocket is already machined to accept that, i.e. I don't have to machine the block. The $60 sets do NOT include a needle thrust bearing or brass bushing.
According to this, my stock engine (which I will be keeping stock) has a roller cam. I thought with a roller cam you were supposed to use a needle thrust bearing and cam button. On O'Reilly's, there is no thrust plate listed either.
The absence of a bearing in the $60 sets has me wondering if my stock engine does not use a thrust bearing. Is there one that I'm supposed to reuse?
Do I need to purchase a timing set with a needle thrust bearing? Can this be generalized to other people?
I'm not asking about single vs double rollers.
Edit: I sprang for a nicer manual and it includes a torque specification for a thrust plate so I guess my truck has one. Does that mean using a cam sprocket without a bearing or bushing is acceptable?