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Home >> Acura >> 2014 >> RDX AWD >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System & Engine Mechanical - Testing & Troubleshooting >> Inspection/Adjustment >> Valve Clearance Adjustment (2016-18) >> Adjustment

Valve Clearance Adjustment (2016-18): Adjustment

NOTE:  Connect the HDS to the DLC, and monitor ECT SENSOR 1. Adjust the valve clearance only when the engine coolant temperature is less than 100 °F (38 °C).

  1. Cylinder Head Cover - Remove
  2. Valve Clearance - Adjust
    GHH72905Courtesy of HONDA, U.S.A., INC.
    1. Set the No. 1 piston at top dead center (TDC). Align the pointer (A) on the front upper cover with the No. 1 piston TDC mark (B) on the front camshaft pulley.
    REAR 
    GHH72906GHH72907Courtesy of HONDA, U.S.A., INC.HONDA, U.S.A., INC.

    FRONT 

    GHH72906GHH72907Courtesy of HONDA, U.S.A., INC.HONDA, U.S.A., INC.
    2. Select the correct feeler gauge for the valve clearance you are going to check.
    Valve Clearance 
    Intake:  0.20-0.24 mm (0.008-0.009 in)
    Exhaust:  0.28-0.32 mm (0.011-0.012 in)
    INTAKE 
    GHH72908GHH72909Courtesy of HONDA, U.S.A., INC.HONDA, U.S.A., INC.

    EXHAUST 

    GHH72908GHH72909Courtesy of HONDA, U.S.A., INC.HONDA, U.S.A., INC.
    3. Insert the feeler gauge (A) between the adjusting screw and the end of the valve stem on the No. 1 cylinder, and slide it back and forth; you should feel a slight amount of drag.
    INTAKE 
    GHH72910GHH72911Courtesy of HONDA, U.S.A., INC.HONDA, U.S.A., INC.

    EXHAUST 

    GHH72910GHH72911Courtesy of HONDA, U.S.A., INC.HONDA, U.S.A., INC.
    4. If you feel too much or too little drag, loosen the locknut, and turn the adjusting screw until the drag on the feeler gauge is correct

    5. While holding the adjusting screw with the screw driver, tighten the locknut, then recheck the clearance. Repeat the adjustment, if necessary.

    Specified Torque 
    Intake: 
    20 N.m (2.0 kgf.m, 15 lbf.ft) 
    Apply new engine oil to the nut threads. 
    Exhaust: 
    20 N.m (2.0 kgf.m, 15 lbf.ft) 
    Apply new engine oil to the nut threads. 
    GHH72912Courtesy of HONDA, U.S.A., INC.
    6. Rotate the crankshaft clockwise. Align the pointer (A) on the front upper cover with the No. 4 piston TDC mark (B) on the front camshaft pulley

    7. Check and, if necessary, adjust the valve clearance on the No. 4 cylinder.

    GHH72913Courtesy of HONDA, U.S.A., INC.
    8. Rotate the crankshaft clockwise. Align the pointer (A) on the front upper cover with the No. 2 piston TDC mark (B) on the front camshaft pulley

    9. Check and, if necessary, adjust the valve clearance on the No. 2 cylinder.

    GHH72914Courtesy of HONDA, U.S.A., INC.
    10.Rotate the crankshaft clockwise. Align the pointer (A) on the front upper cover with the No. 5 piston TDC mark (B) on the front camshaft pulley

    11. Check and, if necessary, adjust the valve clearance on the No. 5 cylinder.

    GHH72915Courtesy of HONDA, U.S.A., INC.
    12.Rotate the crankshaft clockwise. Align the pointer (A) on the front upper cover with the No. 3 piston TDC mark (B) on the front camshaft pulley

    13. Check and, if necessary, adjust the valve clearance on the No. 3 cylinder.

    GHH72916Courtesy of HONDA, U.S.A., INC.
    14.Rotate the crankshaft clockwise. Align the pointer (A) on the front upper cover with the No. 6 piston TDC mark (B) on the front camshaft pulley

    15. Check and, if necessary, adjust the valve clearance on the No. 6 cylinder.

  3. All Removed Parts - Install
      1. Install the parts in the reverse order of removal.