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.
Valve Inspection
- Remove all carbon from the valve stems and valve heads using a wire brush.
- Inspect each valve, install new valves if they show evidence of burn marks, warpage, scuffing, bending or valve tip spalling.
-
NOTE: The intake valve has a larger diameter.
Measure each valve stem for wear using a 0-25 mm (0-1 in) micrometer to measure valve stem diameter. Measure the valve at 2 locations 90 degrees apart. Install new valves if they are below the minimum stem diameter specifications. For additional information, refer to SPECIFICATIONS .
-
NOTE: To prevent engine damage, the minimum valve margin must be maintained around the entire valve perimeter. An insufficient margin will not provide correct heat dissipation and may lead to valve warpage or breakage. Install a new valve if the margin is less than the specified minimum.
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.