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 MANUALSACURA19983.5RL SPECIAL EDITIONREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCEENGINE CONTROLS - ADJUSTMENTSADJUSTMENTVALVE CLEARANCE2.3CL
1998 Acura 3.5RL Special Edition
Valve Clearance: 2.3CL
1998 Acura 3.5RL Special EditionSECTION 2.3CL
- Ensure cylinder head temperature is less than 100°F (38°C). Remove cylinder head cover and upper timing belt cover. Loosen valve adjusting screw locknut and adjust valve clearance. Tighten locknut and recheck valve clearance. After adjusting valves, ensure crankshaft pulley bolt is tightened to 181 ft. lbs. (245 N.m). Tighten valve adjusting screw locknut to 14 ft. lbs. (19 N.m).
- Rotate crankshaft counterclockwise until cylinder No. 1 is at TDC. TDC grooves on camshaft sprocket should be aligned with surface of cylinder head and "UP" mark on camshaft sprocket should be at top. Adjust valves on cylinder No. 1.
- Rotate crankshaft counterclockwise 180 degrees (camshaft sprocket will rotate 90 degrees) to bring No. 3 piston to TDC on compression stroke. "UP" mark on camshaft sprocket should be on exhaust side. Adjust valves on cylinder No. 3.
- Rotate crankshaft counterclockwise 180 degrees (camshaft sprocket will rotate 90 degrees) to bring No. 4 piston to TDC on compression stroke. TDC grooves on camshaft sprocket should be aligned with surface of cylinder head and "UP" mark on camshaft sprocket should be pointing straight down. Adjust valves on cylinder No. 4.
- Rotate crankshaft counterclockwise 180 degrees (camshaft sprocket will rotate 90 degrees) to bring No. 2 piston to TDC on compression stroke. "UP" mark on camshaft sprocket should be on intake side. Adjust valves on cylinder No. 2.VALVE CLEARANCE ADJUSTMENT (2.3CL)
Application (1) In. (mm) Intake .009-.011 (.23-.28) Exhaust .011-.013 (.28-.33) (1) Adjust valves when engine temperature is less than 100°F (38°C).
RENDER: 1.0x
NO RELATED
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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.