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 DIAGNOSISENGINE MECHANICALMECHANICAL3.5L V6 ENGINEOVERHAULCYLINDER HEADVALVE GUIDE INSPECTION
2004 Acura 3.5RL
Valve Guide Inspection
2004 Acura 3.5RLSECTION Valve Guide Inspection
- Place dial indicator against valve head. Lift valve 0.4" (10 mm) from seat. Rock valve stem from side to side, and measure valve wobble.
- If wobble exceeds 0.006" (0.16 mm) for intake valves or 0.009" (0.22 mm) for exhaust valves, install new valve and recheck wobble. If wobble still exceeds limit, go to next step.
- Measure Outside Diameter (O.D.) of valve stem and Inside Diameter (I.D.) of valve guide, in 3 places. Difference between valve stem O.D. and valve guide I.D. is stem-to-guide oil clearance. Subtract smallest measured valve stem O.D. from largest measured valve guide I.D. If difference exceeds service limit, replace valve and valve guide. See CYLINDER HEAD table under ENGINE SPECIFICATIONS.
CAUTION:
DO NOT heat cylinder head with a torch, as head may warp. DO NOT heat cylinder head to greater than 300°F (150°C). This may loosen valve seats.
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.