Honda Civic DIYs and Civic Tech ChatHonda Civic DIYs and Civic Tech Chat - for the true gearheads! Bring your wrench, it's time for some Honda Civic DIY projects! Questions about problems with your car do NOT go here.
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B16A Dual Overhead Camshafts (DOHC)
1. With engine cold, remove upper timing belt cover, valve cover, spark plugs and distributor cap. Adjustment of exhaust and intake valves are done at same time.
FYI: On some applications, the word UP will be cast into the camshaft pulley. On other applications the UP mark will be represented by an arrow pointing to the outer edge of the camshaft pulley.
2. Rotate crankshaft to bring piston No. 1 to TDC on compression stroke. UP marks on camshaft pulleys should be at top, and TDC grooves on camshaft pulleys should align with cylinder head surface. Distributor rotor should point to spark plug wire No. 1 on cap.
3. Loosen lock nuts on valves for cylinder No. 1, and adjust valve clearances to specification.
4. Tighten valve adjuster lock nuts to 15 ft. lbs. (20 N.m). Recheck valve clearance. Readjust valve clearance, if necessary.
5. Rotate crankshaft counterclockwise 180 degrees. Ensure cylinder No. 3 is at TDC. Adjust valves on cylinder No. 3. For remaining cylinders, repeat steps 3) - 5).
6. Replace valve cover and distributor cap. Tighten timing cover bolts and valve cover crown nuts to 7 INCH lbs. (10 N.m).
Single Overhead Camshaft (SOHC)
1. With engine cold, remove timing belt upper cover, valve cover, spark plugs and distributor cap. Adjust exhaust and intake valves at the same time.
2. Rotate crankshaft to bring piston No. 1 to 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. Distributor rotor should point to spark plug wire No. 1 on distributor cap.
3. Loosen lock nuts on valves for cylinder No. 1, and adjust valve clearances to specification.
4. Tighten valve adjuster lock nuts on D15Z1 or D16Z6 engines to 14 ft. lbs. (20 N.m). On all other applications, tighten valve adjuster lock nuts to 10 ft. lbs. (14 N.m). Recheck valve clearance and repeat adjustment, if necessary.
5. Rotate crankshaft counterclockwise 180 degrees. Ensure cylinder No. 3 is at TDC. Adjust valves on cylinder No. 3. For remaining cylinders, repeat steps 3) through 5).
6. Replace valve cover and distributor cap. Tighten timing cover bolts and valve cover crown nuts to 7 INCH lbs. (10 N.m).
