Camshaft Journal Clearance

Measure the outer diameter of the camshaft journal.
Standard No. 1 outer diameter: 27.935 - 27.955 mm (1.0998 - 1.1006 in)

Standard No. 2, 3, 4, 5, outer diameter: 23.435 - 23.455 mm (0.9226 - 0.9234 in)

Fig 1: Measuring Outer Diameter Of Camshaft Journal
Courtesy of NISSAN MOTOR CO., U.S.A.
Tighten the camshaft bracket bolts to the specified torque following the tightening pattern as shown. Refer to "INSTALLATION ".

Fig 2: Identifying Tightening Sequence Of Camshaft Bracket Bolts
Courtesy of NISSAN MOTOR CO., U.S.A.
Using inside micrometer, measure inner diameter of camshaft bracket.
Standard: 28.000 - 28.021 mm (1.1024 - 1.1032 in) No. 1

Standard: 23.500 - 23.521 mm (0.9252 - 0.9260 in) No. 2, 3, 4, 5

Fig 3: Measuring Inner Diameter Of Camshaft Bracket Using Inside Micrometer
Courtesy of NISSAN MOTOR CO., U.S.A.
Calculate camshaft journal clearance.
- (Journal clearance) = (inner diameter of camshaft bracket) - (outer diameter of camshaft journal)
  Standard: 0.045 - 0.086 mm (0.0018 - 0.0034 in)
- When out of the specified range above, replace either or both the camshaft and the cylinder head assembly.
  NOTE: Inner diameter of the camshaft bracket is manufactured together with the cylinder head. If the camshaft bracket is out of specification, replace the entire cylinder head assembly.