1999 Cat with 93,543 miles. Going across KY into WVa when I got a lot of "rapping" under the valve covers. I am in dier need of advice before I proceed. I have at least 500 miles more to go before I get home. Oil pressure is good, not over heating, plenty of power. No lights, bells, or SES lights. No apparent leaks or anything. Actually oil pressure is a tad bit hgher than normal. What options do I have to get the car home? What can I expect to have to pay to get this fixed?? I need to get my wife's car home . . . . .