On the bearing journals of the camshaft, scuffing, nicks, scratches, aluminum enveloping from bearing housings are not allowed. On the working surfaces of the cams, wear of more than 0.5 mm is not allowed, as well as scuffing and wear of the cams in the form of a cut.
Install the camshaft with the outer journals on two prisms placed on the calibration plate, and measure the radial runout of the middle journals with an indicator, which should be no more than 0.04 mm. If the runout exceeds the specified value, then straighten the shaft on a straightening press.