6. CYLINDER HEAD/VALVES Downtown 300i ABS Nut Remove two nuts attaching to the upper/lower side of cylinder head. Remove two bolts attaching to the cylinder head. Remove the cylinder head. Remove the dowel pins and cylinder head gasket. Remove the cam chain guide. Bolts Remove all gasket material from the cylinder head mating surface. Cylinder Head Gasket Dowel pins Be careful not to drop any gasket material into the engine. CYLINDER HEAD DISASSEMBLY Remove the valve spring cotters, retainers, springs, spring seats and valve stem seals using a valve spring compressor. · Be sure to compress the valve springs Cam Chain Guide with a valve spring compressor. · Mark all disassembled parts to ensure correct reassembly. Special Valve spring compressor E040 Remove carbon deposits from the exhaust port and combustion chamber. Valve Spring Compressor 6-7