Combustion Chamber
WARNING: This page is about a different car, the 2011 Suzuki SX4. However, it is still accessible from the selected car via links, so may be relevant.
- Remove all carbon deposits from all combustion chambers.NOTE: Do not use any sharp-edged tool to scrape off carbon deposits. Be careful not to scuff or nick metal surfaces when removing carbon deposits. The same applies to valves and valve seats, too.
- Check cylinder head for cracks on intake and exhaust ports, combustion chambers, and head surface.
Cylinder Head Flatness
Using a straightedge (1) and thickness gauge (2), check flatness of gasket surface at a total of 6 locations. If any measure value exceeds its limit, correct gasket surface with a surface plate and abrasive paper of about #400 (Waterproof silicon carbide abrasive paper): place abrasive paper on and over surface plate, and rub gasket surface against paper to grind off high spots.
If it is impossible to correct cylinder head distortion, replace cylinder head.
NOTE:
Distorted mating surface of cylinder head and cylinder head gasket causes combustion gas leakage, overheating and reduced power output.
Distortion of mating surface of cylinder head and cylinder head gasket
Limit: 0.03 mm (0.0011 in.)