7. CYLINDER HEAD/VALVES MXU 300/250 ASSEMBLY Install the valve spring seats and oil seal. Be sure to install new oil seal. 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. · Install the cotters with the pointed ends facing down from the upper side of the cylinder head. Special tool: Valve Spring Compressor E040 Tap the valve stems gently with a plastic hammer for 23 times to firmly seat the cotters. Be careful not to damage the valves. Gasket INSTALLATION Install the dowel pins and a new cylinder head gasket. Reverse the "CYLINDER HEAD REMOVAL" procedures. After camshaft holder is installed and tighten the nuts, then tighten cylinder head bolts. Torque: Cylinder head bolt: Dowel Pins 1 kgf-m (10 Nm, 7.2 lbf-ft) 7-13