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I posted a couple of weeks ago about a thermoquad issue on a 340 that I thought I had. Well it turns out that the problem is with the lifters. I could not get the engine to run right so I had another carb installed that worked, and still a rough idle. I took the valve covers off today and discovered a lifter had come apart and the plunger cap was laying in the lifter sidways. Has anyone else had problems with the Mopar Performance cams and lifters?



i had the same thing happen with an MP 484 smallblock cam .

you better get out the wrenches because when that happenes it stops the lifter from rotating and flattens the cam lobe in short order , the reason for your rough running issue .

motor has to come out and be completely gone thru , metal is everywhere