Camshaft Journal Clearance

Outer Diameter of Camshaft Journal 

• 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 Camshaft Journal Diameter

  Courtesy of NISSAN NORTH AMERICA, INC.

Inner Diameter of Camshaft Bracket 

• Tighten the camshaft bracket bolts to the specified torque following the tightening pattern as shown below.

  Step 1 (bolts 9 - 11): 1.96 N.m (0.2 kg-m, 17 in-lb) 

  Step 2 (bolts 1 - 8): 1.96 N.m (0.2 kg-m, 17 in-lb) 

  Step 3 (bolts 1 - 11): 5.88 N.m (0.6 kg-m, 52 in-lb) 

  Step 4 (bolts 1 - 11): 10.4 N.m (1.02 kg-m, 92 in-lb) 

  Fig 2: Identifying Camshaft Bracket Bolts Tightening Sequence

  Courtesy of NISSAN NORTH AMERICA, INC.
• Using inside micrometer, measure inner diameter of camshaft bracket.

  Standard No. 1: 28.000 - 28.021 mm (1.1024 - 1.1032 in) 

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

  Fig 3: Measuring Inner Diameter Of Camshaft Bracket

  Courtesy of NISSAN NORTH AMERICA, INC.

Calculation of 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 whole cylinder head assembly.