Engine Repair Work Example 5

WorkKey Level: 4
NATEF Automotive Tasks: I.B.6, I.B.14, I.C.4, I.C.6, I.C.7, I.C.9

Find the difference between the major and minor diameter of the following components.

Type	Major Diameter	Minor Diameter	Difference
Valve Stem	0.375”	0.368”
Cylinder Bore	3.692”	3.686”
Crank Shaft Journal	2.499”	2.4965”
Cam Lobe	25.67 mm	20.86 mm
Cylinder Bore	93.77 mm	93.624 mm

Solution:

Difference is Major Diameter minus Minor Diameter.

Valve Stem:  0.375 –0.368 = 0.007"
Cylinder Bore:  3.692 – 3.686 = 0.006"
Crank Shaft Journal:  2.499 – 2.4965 = 0.0025"
Cam Lobe:  25.67 – 20.86 = 4.81 mm
Cylinder Bore:  93.77 –- 93.624 = 0.146 mm