ENGINE 56 K. Camshaft : 1. Check cam shaft run out at 2nd journal by supporting it on V-block at 1st and 3rd journal. 2. Check cam shaft journal dimensions. Record the readings. 3. Carry out visual inspection of cam shaft for: Overheating of journals, this is indicated by bluish/ brown color. Deep scoring marks on journals and cam lobes Cracks, which should be checked on a magnetic crack detector. 4. Check hardness of cam shaft journals and cam lobes, it should be 47 HRC. Camshaft journal and bearing bore dimensions : Cam shaft bearing bore diameter in cylinder head (mm) Cam shaft bearing journal diameter in cylinder head (mm) Standard 24 H 7 24f7 Standard 1 24.1H7 24.1f7 Bore dia. In 1st and 3rd cap for front oil seal (mm) Ø 32 F 7 Maximum permissible run out of camshaft bearing journal (mm) 0.02 Maximum permissible axial play of the camshaft in installed condition (mm) 0.18 - 0.25 Run out of oil seal mating diameter 0.02
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