The camshaft after coming out of the engine should be cleaned using solvent and then dried before it is examined and the bearing journals for signs of lateral wear, surface pitting or signs of seizure there are high chances that the bearing inserts in the block are also damaged and therefore the both the camshaft and bearings must be replaced. If the journals are in good condition, check them by micrometer for wear and out of round condition, to check the inside diameter of each bearing telescopic gauge and micrometer will be used. Cam journal diameter should be subtracted from the corresponding bearing inside diameter to get the bearing oil clearance, which should be compared to the specified limits; if all clearances are too big new bearings must be installed by an automotive machine shop. Also, the camshaft lobes should be inspected for signs of heat-check, fatigue cracks, scoring, chips, pits, and unequal wear; if the camshaft lobes are acceptable and the lobe lift measurements are within the maximum allowable limits, the camshaft should be reinstalled, so long the bearing journals are also satisfactory. Camshaft lobe lift can be determined with the camshaft in place or with the camshaft removed, by measuring the major and minor diameters of each lobe with a micrometer and recording and calculating the lift; if any lobe's lift is below specification then the camshaft has to be replaced. For camshaft bearing replacement, tool and skill needed are special so it is advised that the block should taken to an automotive machine shop for handling.