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Camshaft Inspection

WARNING: This page is about a different car, the 2013 Honda Fit, 2012 Honda Fit, 2011 Honda Fit, 2010 Honda Fit, and 2009 Honda Fit. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove the camshaft sprocket (see CAMSHAFT SPROCKET REMOVAL  ).
  2. Remove the rocker arm assembly (see ROCKER ARM ASSEMBLY REMOVAL  ), then disassemble the rocker arm (see ROCKER ARM AND SHAFT DISASSEMBLY/REASSEMBLY  ).
  3. Put the rocker shaft holder bridge/rocker shaft holders on the cylinder head, then tighten the bolts to the specified torque.

    Specified Torque 

    6 x 1.0 mm 

    (1)-(10): 15 N.m (1.5 kgf.m, 11 lbf.ft) 

    (11): 9.8 N.m (1.0 kgf.m, 7.2 lbf.ft) 

    Fig 1: Identifying Cylinder Head Bolt Torque Sequence
    G05952538Courtesy of AMERICAN HONDA MOTOR CO., INC.
  4. Seat the camshaft by pushing it toward the rear of the cylinder head.
  5. Zero the dial indicator against the end of the camshaft. Push the camshaft back and forth, and read the end play. If the end play is beyond the service limit, replace the thrust cover and recheck. If it is still beyond the service limit, replace the camshaft.

    Camshaft End Play 

    Standard (New): 0.05-0.25 mm (0.002-0.010 in.) 

    Service Limit: 0.5 mm (0.02 in.) 

    Fig 2: Identifying Camshaft End Play
    G05952539Courtesy of AMERICAN HONDA MOTOR CO., INC.
  6. Remove the camshaft (see CAMSHAFT REMOVAL  ).
  7. Wipe the camshaft clean, then inspect the lift ramps. Replace the camshaft if any lobes are pitted, scored, or excessively worn.
  8. Measure the diameter of each camshaft journal.
    Fig 3: Measuring Diameter Of Camshaft Journal
    G05952540Courtesy of AMERICAN HONDA MOTOR CO., INC.
  9. Zero the gauge (A) to the journal diameter.
    Fig 4: Identifying Gauge
    G05952541Courtesy of AMERICAN HONDA MOTOR CO., INC.
  10. Clean the camshaft bearing surfaces in the cylinder head. Measure the inside diameter of each camshaft bearing surface, and check for an out-of-round condition.
    • If the camshaft-to-holder clearance is within limits, go to step  12.
    • If the camshaft-to-holder clearance is beyond the service limit, and the camshaft has been replaced, replace the cylinder head.
    • If the camshaft-to-holder clearance is beyond the service limit, and the camshaft has not been replaced, go to step 11.

    Camshaft-to-Holder Oil Clearance 

    Standard (New): 0.045-0.084 mm 

    (0.0018-0.0033 in.) 

    Service Limit: 0.100 mm (0.004 in.) 

    Fig 5: Measuring Inside Diameter Of Camshaft-To-Holder Oil Clearance
    G05952542Courtesy of AMERICAN HONDA MOTOR CO., INC.
  11. Check the total runout with the camshaft supported on V-blocks.
    • If the total runout of the camshaft is within the service limit, replace the cylinder head.
    • If the total runout is beyond the service limit, replace the camshaft, and recheck the oil clearance. If the oil clearance is still out of tolerance, replace the cylinder head.

    Camshaft Total Runout 

    Standard (New): 0.03 mm (0.0012 in.) max. 

    Service Limit: 0.04 mm (0.002 in.) 

    Fig 6: Identifying Camshaft Total Runout
    G05952543Courtesy of AMERICAN HONDA MOTOR CO., INC.
  12. Measure the cam lobe height.

    Cam Lobe Height Standard (New): 

    CAM LOBE HEIGHT SPECIFICATION TABLE

    - INTAKE EXHAUST
    PRI 35.241 mm (1.3874 in.) 35.471 mm (1.3965 in.)
    SEC 36.173 mm (1.4241 in.)

    PRI: Primary, SEC: Secondary

    C/C: Cam Chain, IN: Intake, EX: Exhaust

    Fig 7: Identifying Cam Lobe Height
    G05952544Courtesy of AMERICAN HONDA MOTOR CO., INC.
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