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Q: low power, backfiring on 1992 Dodge D350

Thanks again valleyautotech for your recent answers. I think I have found the problem with th 92 D350 5.9L eng. I was cleaning the intake manifold and heads when I decided to go ahead and pull the pushrods and lifters out. Everything looked good. I still had a feeling that the timing was just not right due to the fact that at idle it would jump a degree every few rotations and jump 15-20 degrees at high rpm. Since the lifters were not in I had a straight shot at the cam. I took a ratchet and rotated the crank back and forth multiple times and as soon as I turned it bam the cam would rotate as to tell me that the timing chain is good. Just as I was ready to assemble everything I noticed that the pinion gear on the oil pump did not move as abruptly as the cam did. I could rotate the crank an eighth of an inch or more and then the gear would catch. I called two dodge dealers and both had the part in stock. My question is by changing the oil pump gear should I in turn remove the cam and change that gear or cam as well, or is the cam gear made of harder steel causing the oil pump gear to wear instead? Thanks again I appreciate it! Mike
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The cam gear is machined into the camshaft and the only way to change it is to change the cam, the oil pump gear should be changed if there is too much play and you should be fine. Good job
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