6. CYLINDER HEAD/VALVES K-XCT 125i Cylinder head Check the spark plug hole and valve areas for cracks. Check the cylinder head for warpage with a straight edge and feeler gauge. Service Limit: 0.05 mm Valve Spring Compressor ASSEMBLY Install the valve spring seats and oil seal. Be sure to install the new oil seals. Lubricate each valve with engine oil and insert the valves into the valve guides. Install the valve springs and retainers. Compress the valve springs using the valve spring compressor, then install the valve cotters. When assembling, a valve spring compressor must be used. Special tool: Valve Spring Compressor A120E00040 Plastic Hammer Tap the valve stems gently with a plastic hammer for 23 times to firmly seat the cotters. Be careful not to damage the valves. Cylinder Head 6-13