Accord 3.0L
- Remove throttle body cover, intake manifold covers and intake manifold cover stay. Disconnect EVAP canister hose from throttle body. Disconnect vacuum hose and breather pipe from intake air duct, and remove intake air duct. Loosen lock nuts on throttle and cruise control cables and remove cables from accelerator linkage.
- Disconnect vacuum hoses, brake booster vacuum hose and PCV hose from manifold. Disconnect vacuum hose, breather hose and water by-pass hoses from throttle body. Remove intake manifold, valve covers and front upper timing belt cover. Adjustment of exhaust and intake valves for each cylinder are done at same time.
- Rotate crankshaft clockwise until cylinder No. 1 Top Dead Center (TDC) mark on front camshaft pulley is aligned with TDC mark on back cover. See Fig 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.
- Tighten valve adjuster lock nuts to 14 ft. lbs. (19 N.m) and check valve clearance. Repeat adjustment, if necessary. Rotate crankshaft clockwise until cylinder No. 4 TDC mark on front camshaft pulley is aligned with TDC mark on back cover. Loosen valve adjuster lock nuts and adjust valves. Tighten valve adjuster lock nuts to 14 ft. lbs. (19 N.m) and check valve clearance. Readjust valve clearance, if necessary.
- Rotate crankshaft clockwise until TDC mark for next cylinder in firing order is aligned with TDC mark on back cover. See Fig 3. Loosen valve adjusting lock nuts, adjust valve clearances. Tighten adjusting lock nuts. Check valve clearance and readjust if necessary. Repeat valve adjusting procedure in cylinder firing order until all valve clearances are correct.
- After adjusting valve clearances, retighten crankshaft pulley bolt to 181 ft. lbs. (245 N.m). To complete valve adjusting procedure, reverse removal procedures. Tighten intake manifold sequentially in 2-3 passes to 16 ft. lbs. (22 N.m). See Fig 1. Tighten valve covers sequentially in 2-3 passes to 106 INCH. lbs. (12 N.m). See Fig 2.
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Courtesy of AMERICAN HONDA MOTOR CO., INC.