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 DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 49 (3.2L V6 ENGINE)OVERHAULCYLINDER HEADVALVE GUIDE REPLACEMENT
2004 Acura 3.5RL
Valve Guide Replacement
2004 Acura 3.5RLSECTION Valve Guide Replacement
WARNING: This page is about a different car, the 2003 Acura 3.2CL, 2002 Acura 3.2CL, and 2001 Acura 3.2CL. However, it is still accessible from the selected car via links, so may be relevant.
- Inspect valve stem-to-guide clearance. See VALVE STEM-TO-GUIDE CLEARANCE INSPECTION .
- Use appropriate air-impact valve guide driver (A) modified to fit the diameter of the valve guides. See Fig 1. In most cases, the same procedure can be done using the driver and a conventional hammer.
- Select the proper replacement guides and chill them in the freezer section of a refrigerator for about an hour.
- Use a hot plate or oven to evenly heat the cylinder head to 300°F (150°C). See Fig 2. Monitor the temperature with a cooking thermometer. DO NOT get head hotter than 300°F (150°C); excessive heat may loosen the valve seats.
- Working from the camshaft side, use the driver and an air hammer to drive the guide about .1" (2 mm) towards the combustion chamber. See Fig 3. This will knock off some of the carbon and make removal easier. Hold the air hammer directly in line with the valve guide to prevent damaging the driver. Wear safety goggles or a face shield.
- Turn the head over and drive the guide out toward the camshaft side of the head.
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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.