Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSACURA20043.5RLREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCEENGINE CONTROLS - ON-VEHICLE ADJUSTMENTSVALVE CLEARANCERSX
2004 Acura 3.5RL
Valve Clearance: RSX
2004 Acura 3.5RLSECTION RSX
- Ensure cylinder head temperature is less than 100°F (38°C). Remove cylinder head cover.
- Rotate crankshaft clockwise until cylinder No. 1 is at TDC. Align TDC marks on Variable Valve Timing Control (VTC) actuator and exhaust camshaft sprocket. See Fig 1 . Loosen valve adjusting screw lock nuts and adjust valve clearances on cylinder No. 1. See VALVE CLEARANCE ADJUSTMENT table. Tighten valve adjusting screw lock nut to 10 ft. lbs. (14 N.m) and recheck valve clearance. Repeat adjustment if necessary.
- Rotate crankshaft clockwise 180 degrees (camshaft sprockets will rotate 90 degrees). Adjust valves on cylinder No. 3. Loosen valve adjusting screw lock nuts and adjust valve clearances on cylinder No. 3. Tighten valve adjusting screw lock nut to 10 ft. lbs. (14 N.m) and recheck valve clearance. Repeat adjustment if necessary.
- Rotate crankshaft clockwise 180 degrees (camshaft sprockets will rotate 90 degrees). Loosen valve adjusting screw lock nuts and adjust valve clearances on cylinder No. 4. Tighten valve adjusting screw lock nut to 14 ft. lbs. (20 N.m) and recheck valve clearance. Repeat adjustment if necessary.
- Rotate crankshaft clockwise 180 degrees (camshaft sprockets will rotate 90 degrees). Loosen valve adjusting screw lock nuts and adjust valve clearances on cylinder No. 2. Tighten valve adjusting screw lock nut to 14 ft. lbs. (20 N.m) and recheck valve clearance. Repeat adjustment if necessary. Reinstall cylinder head cover and ensure crankshaft pulley bolt is tightened to 181 ft. lbs. (245 N.m).
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.