Civic L4-1668cc 1.7L SOHC MFI (2003)
Valve Clearance: Adjustments
Adjustment
NOTE: Adjust the valves only when the cylinder head temperature is less than 100°F (38°C).
1. Remove the ignition coil cover, then remove the four ignition coils.
2. Remove the throttle cable clamps and harness holder from the cylinder head cover.
3. Remove the cylinder head cover.
4. Remove the grommet from the upper cover, and disconnect the camshaft position (CMP) (top dead center (TDC)) sensor connector. Remove the
upper cover.
5. Set the No. 1 piston at TDC. The "UP" mark (A) on the camshaft pulley should be at the top, and the TDC marks (B) on the pulley should line up
with the top edge of the head.
6. Select the correct thickness feeler gauge for the valves you're going to check.
Intake: 0.18 - 0.22 mm (0.007 - 0.009 inch)
Exhaust: 0.23 - 0.27 mm (0.009 - 0.011 inch)
Adjusting screw location: