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Accord 2.3L & Civic

  1. Remove timing belt upper cover, valve cover, spark plugs and distributor cap. Adjustment of exhaust and intake valves for each cylinder are done at same time.
  2. Rotate crankshaft counterclockwise to bring piston No. 1 to Top Dead Center (TDC) on compression stroke. "UP" mark on camshaft pulley should be at top, and TDC grooves on camshaft pulley should align with cylinder head surface. See Fig 1. TDC groove (White mark) on crankshaft pulley should align with timing pointer and distributor rotor should point to spark plug wire No. 1 on distributor cap.
  3. Measure clearance between valve stem and rocker arm. See VALVE CLEARANCE ADJUSTMENT SPECIFICATIONS (COLD)  table. See Figure. Adjust valve clearances to specification if necessary. Loosen valve adjuster lock nuts and turn adjusting screw for each valve on cylinder No. 1. Go to next step.
  4. On Accord and Civic with D16Y5 or D16Y8 engine, tighten valve adjuster lock nuts to 14 ft. lbs. (19 N.m). On Civic with D16Y7 engine, tighten valve adjuster lock nuts to 13 ft. lbs. (18 N.m). On all models, check valve clearance and repeat adjustment, if necessary.
  5. Rotate crankshaft counterclockwise 180 degrees (camshaft pulley rotates 90 degrees). Ensure "UP" mark on camshaft pulley is on exhaust side and cylinder No. 3 is at TDC. Adjust valves on cylinder No. 3. Repeat step  4 and go to next step.
  6. Rotate crankshaft counterclockwise 180 degrees (camshaft pulley rotate 90 degrees). Ensure "UP" mark on camshaft pulley is pointing downward, TDC grooves on camshaft pulley are aligned with cylinder head surface and cylinder No. 4 is at TDC. Adjust valves on cylinder No. 4. Repeat step  4 and go to next step.
  7. Rotate crankshaft counterclockwise 180 degrees (camshaft pulley rotate 90 degrees). Ensure "UP" mark on camshaft pulley is on intake side and cylinder No. 2 is at TDC. Adjust valves on cylinder No. 2. Repeat step  4 and go to next step.
  8. After adjusting valve clearances, retighten crankshaft pulley bolt to 181 ft. lbs. (245 N.m) on Accord and 134 ft. lbs. (182 N.m) on Civic. Install timing belt upper cover, valve cover, spark plugs and distributor cap. Tighten timing belt cover and valve cover bolts and nuts to 89 INCH lbs. (10 N.m). Tighten valve cover bolts sequentially in 2-3 passes. See Fig 2 or Fig 3 .
Fig 1: Aligning No. 1 Cylinder SOHC Pulley Top Dead Center (TDC) Marks (Accord 2.3L & Civic)
G90G17109Courtesy of AMERICAN HONDA MOTOR CO., INC.
Fig 2: Valve Cover Tightening Sequence (Accord 2.3L)
G99J08680Courtesy of AMERICAN HONDA MOTOR CO., INC.
Fig 3: Valve Cover Tightening Sequence (Civic)
G99B08681Courtesy of AMERICAN HONDA MOTOR CO., INC.
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