Chevrolet Repair: Upper engine noise, 1997 geo prism, soundes

Question
I have a 1997 Geo Prism, with 68,000 miles, there is an upper engine noise allmost soundes like the valves, but I understand they are not hydraulic but a solid roller cam. Did Chevy have problems with the upper engine ? How would you adjust the noise out?    Thank you,
                    Bob

Answer
As far as I know I havent heard any reports with Chev having this problem. Also this is no adjustable, what I would reccommend is a can of engine flush, add this to the crankcase and then change the oil after 5 minutes. You could have a stcky lifter hanging up..