Valve Clearance Inspection
WARNING: This page is about a different car, the 2004 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.
- Disconnect the negative battery cable.
- Remove the tire (RH).
- Remove the splash shield (RH).
- Remove the plug hole plate. (See PLUG HOLE PLATE REMOVAL/INSTALLATION .)
- Remove the spark plugs. (See SPARK PLUG REMOVAL/INSTALLATION .)
- Remove the oil control valve (OCV) connector.
- Remove the ventilation hose.
- Remove the cylinder head cover.
- Verify that the engine is in cold condition.
- Measure the valve clearance.
- Turn the crankshaft clockwise so that the No.1 piston is at TDC of the compression stroke.
- Measure the valve clearance at A in the figure.
- If the valve clearance is out of the standard value, adjust it. (See VALVE CLEARANCE ADJUSTMENT .)
NOTE:- Make sure to note down the measured values for choosing the suitable replacement tappets.
Standard [Engine cold]
IN: 0.22-0.28 mm {0.0087-0.0110 in}
EX: 0.27-0.33 mm {0.0107-0.0129 in}
- Rotate the crankshaft 360° clockwise so that the No. 4 piston is at TDC of the compression stroke.
- Measure the valve clearance at B in the figure.
- If the valve clearance is out of the standard value, adjust it. (See VALVE CLEARANCE ADJUSTMENT .)
NOTE:- Make sure to note down the measured values for choosing the suitable replacement tappets.
Standard [Engine cold]
IN: 0.22-0.28 mm {0.0087-0.0110 in}
EX: 0.27-0.33 mm {0.0107-0.0129 in}
- Install the cylinder head cover. (See Cylinder Head Cover Installation Note .)
- Install the ventilation hose.
- Install the oil control valve (OCV) connector.
- Install the high-tension lead. (See HIGH-TENSION LEAD (L3) REMOVAL/INSTALLATION .)
- Install the spark plugs. (See SPARK PLUG REMOVAL/INSTALLATION .)
- Install the plug hole plate.
- Install the splash shield (RH).
- Install the tire (RH).