Disconnect the cable from the negative battery terminal. Remove the spark plugs, then take off the valve cover. Loosen the right front wheel lug nuts, raise the front of the vehicle, and support it securely on jackstands before removing the wheel and the fender splash shield. Using a wrench or socket on the crankshaft pulley bolt, rotate the crankshaft clockwise and check each lifter when its camshaft lobe is straight up, ensuring that the measurement is between the base circle of the camshaft lobe and the top of the lifter. Use feeler gauges to measure the clearances, ensuring a slight drag is felt when sliding the gauge between the lifter and the camshaft if the clearance is correct. Check the clearance between each camshaft lobe and the lifter it operates, keeping careful notes of the measurements recorded for each lifter. If some measurements fall outside the recommended clearances, the camshafts must be removed along with the out-of-spec lifters. New lifters are available with various thicknesses to correct the valve clearances, marked with a thickness number that only includes the digits after the decimal point. To determine the desired thickness for new lifters, add the thickness of the original lifter to the measured clearance, then subtract the midrange figure for ideal clearance to find the proper lifter thickness to order, noting that not every thickness is available. For installation of the camshafts, once the camshafts and timing chain have been installed, recheck the valve clearances. The remainder of the installation follows the reverse order of removal, and after running the engine, check for oil leaks.
