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 MECHANICALMECHANICAL3.5L V6 ENGINEOVERHAULCYLINDER HEADVALVE GUIDE REPLACEMENT
2004 Acura 3.5RL
Valve Guide Replacement
2004 Acura 3.5RLSECTION Valve Guide Replacement
- Use an air hammer and Valve Guide Driver (07742-0010100) to remove and install valve guides. See Figure. Chill replacement guides in a freezer for about an hour. Use a hot plate or oven to heat cylinder head evenly to 300°F (150°C).CAUTION: Drill guides only in extreme cases. Cylinder head damage can occur if valve guide breaks.
- Working from camshaft side, drive valve guide about 5/64" (2 mm) toward combustion chamber to dislodge carbon and make removal easier. Turn cylinder head over, and drive valve guide out toward camshaft side. If guide does not move, drill guide with 5/16" drill, and then try again.
- Individually remove new guides, as needed, from freezer. Coat outside of new valve guide with a thin coat of engine oil. Using Valve Guide Driver (07742-0010100), install valve guide on heated cylinder head. Install guides from camshaft side of head. Valve guide (intake and exhaust) height should be 0.62-0.64" (15.75-16.25 mm).
- If replacing all valve guides, reheat cylinder head as necessary. Using cutting oil, ream new valve guides by rotating Valve Guide Reamer (07HAH-PJ7010B) clockwise the full length of valve guide bore.
- Continue rotating reamer clockwise while removing it from bore. Thoroughly wash guide in detergent and water to remove any cutting residue. Check valve stem-to-guide oil clearance. See CYLINDER HEAD table under ENGINE SPECIFICATIONS.
NOTE:
Always reface valve seat after replacing valve guide.
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.