Honda Civic/Del Sol 1996-2000

Valve Lash

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ADJUSTMENT





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Fig. Using a feeler gauge to adjust the valve lash

The radio may contain a coded anti-theft circuit. Obtain the security code before disconnecting the battery.

  1. Disconnect the negative battery cable.
  2.  
  3. The valves should be checked and adjusted when the engine is cold. If the engine has been run, allow it to cool to below 100° F (38° C) before beginning adjustments.
  4.  
  5. The valves must be checked or adjusted for each cylinder with the cylinder in the TDC position of the compression stroke.
  6.  
  7. Remove the cylinder head cover and the upper timing belt cover.
  8.  
  9. Rotate the crankshaft in a counterclockwise direction until the painted white notch Top Dead Center (TDC) mark on the crankshaft pulley is aligned with the pointer on the engine cover, and the UP mark on the camshaft sprocket is facing up. The No. 1 cylinder is at TDC/compression stroke in this position.
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  11. With the cylinder at TDC on the compression stroke, check the valve clearance by inserting the correct size feeler gauge between the rocker and the valve tip of the valves for that cylinder.
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  13. Hold the rocker arm against the camshaft and use a feeler gauge to check the clearance at the valve stem; intake valve clearance should be 0.010 in. (0.26mm), exhaust valve clearance should be 0.012 in. (0.30mm). The service limit for both intake and exhaust valves is plus or minus 0.0008 in. (0.02mm).
  14.  
  15. To check the intake valves proceed as follows:
    1. Using a 0.009in. (.24mm) feeler gauge, see if the gauge will slide between the valve tip and the rocker.
    2.  
    3. If the 0.009in. (.24mm) feeler gauge does not fit between the rocker and the valve tip, then adjust the valve. If the feeler gauge did fit, then try inserting a 0.011in. (.28mm) feeler gauge.
    4.  
    5. If the 0.011in. (.28mm) feeler gauge can be inserted between the rocker and the valve tip, then adjust the valve. If the feeler gauge cannot be inserted, then the valve adjustment for that valve is within the range specified.
    6.  

  16.  
  17. The valve adjustment specification for the intake valve is 0.010in. (.26mm). To adjust an intake valve, proceed as follows:
    1. Loosen the lock-nut and turn the adjusting screw counterclockwise to loosen the adjustment screw.
    2.  
    3. Hold the rocker arm against the camshaft and insert a 0.010 in. (0.26mm) feeler gauge between the rocker and the valve tip.
    4.  
    5. Hold the lock-nut and turn the adjusting screw until a very light resistance is felt. The feeler gauge should be able to be moved with a slight amount of drag.
    6.  
    7. While holding the adjustment screw in place, tighten the lock-nut and then recheck the clearance.
    8.  

  18.  
  19. To check the exhaust valve clearance proceed as follows:
    1. Using a 0.011in. (.28mm) feeler gauge, see if the gauge will slide between the valve tip and the rocker.
    2.  
    3. If the 0.011in. (.28mm) feeler gauge does not fit between the rocker and the valve tip, then adjust the valve. If the feeler gauge did fit, then try inserting a 0.013in. (.33mm) feeler gauge.
    4.  
    5. If the 0.013in. (.33mm) feeler gauge can be inserted between the rocker and the valve tip, then adjust the valve. If the feeler gauge cannot be inserted, then the valve adjustment for that valve is within the range specified.
    6.  

  20.  
  21. The valve adjustment specification for the exhaust valve is 0.012in. (0.30mm). To adjust an exhaust valve, proceed as follows:
    1. Loosen the lock-nut and turn the adjusting screw counterclockwise to loosen the adjustment screw.
    2.  
    3. Hold the rocker arm against the camshaft and insert a 0.012in. (0.30mm) feeler gauge between the rocker and the valve tip.
    4.  
    5. Hold the lock-nut and turn the adjusting screw until a very light resistance is felt. The feeler gauge should be able to be moved with a slight amount of drag.
    6.  
    7. While holding the adjustment screw in place, tighten the lock-nut and then recheck the clearance.
    8.  

  22.  
  23. Repeat the checking procedure for each valve and adjust the clearance for any valve found to be out of adjustment.
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  25. Once all of the valves for a cylinder have been checked, the crankshaft must be rotated counterclockwise to check the valves of another cylinder.
  26.  
  27. When rotating the crankshaft counterclockwise, the adjustment order is cylinder No. 1, cylinder No. 3, cylinder No. 4, cylinder No. 2.
  28.  
  29. Rotate the crankshaft counterclockwise 180° to bring the next cylinder to the TDC/compression position.
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  31. Refer to the following information to verify the cylinder to be checked is in the TDC/compression position.

    At TDC/compression for the No. 1 cylinder, the camshaft sprocket UP mark should be pointed straight up, and the TDC marks align with the edge of the cylinder head.
     
    At TDC/compression for the No. 3 cylinder, the camshaft sprocket UP mark should be horizontal, and pointed to the left.
     
    At TDC/compression for the No. 4 cylinder, the camshaft sprocket UP mark should be pointed straight down, and the TDC mark should align with the edge of the cylinder head.
     
    At TDC/compression for the No. 2 cylinder, the camshaft sprocket UP mark should be horizontal, and pointed to the right.
     

  32.  
  33. After checking the valves, check and if necessary, retighten the crankshaft pulley bolt in a clockwise direction to 181 ft. lbs. (245 Nm).
  34.  
  35. Thoroughly clean the cylinder head cover gasket and make sure it is fully seated into the head cover. Apply a liquid gasket sealant to the corners of the half circle portions of the gasket.
  36.  
  37. Install the cylinder head and timing belt covers, tightening the fasteners evenly to 86 inch pounds (9.8 Nm).
  38.  
  39. Reconnect the negative battery cable. Enter the radio security code.
  40.  

 
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