3.2.3. Cylinder head z Carefully remove carbon from the lower face of the cylinder head using nonmetallic material to z Check the entire cylinder head for very fine cracks or damage invisible to ordinary sight using a prevent scratching of the valve seat faces. hydraulic tester or a magnetic flaw detector. 1) Cylinder head disassembly NOTE : Be careful for the cylinder head gasket contacting surface of cylinder head not to be damaged. z Remove the cotter pin pressing the valve spring by means of a special Valve spring compressor tool. EA0M4007 z Take out the valve stem seal. z Pull out the intake and exhaust valves.
z Remove the valve guides from the combustion room side of cylinder head by means of a special tool. EFM2034I 2) Inspection and measurement of cylinder head a) Inspection of cracks and damage z Eliminate the carbon residue and gasket piece from the cylinder head lower face thoroughly. Then be careful for the valve seat not to be damaged. z For cracks or damages to search difficult may be inspected by a hydraulic test or a magnetic powder test. (Hydraulic test is same as for cylinder block.) Inspection - 63 -