4. DISASSEMBLY, INSPECTION AND REASSEMBLY OF ENGINES 4.2.8 Valve stem seal replacement Always use a new seal after the intake/exhaust valve is disassembled. Since the one for the exhaust valve is marked with yellow paint, do not confuse the intake and exhaust valves. 1) Apply engine oil to the lip. 2) Push with the inserting tool (Refer to No.5 of 4.1.2 in Chapter 4) for installation. 3) Measure and check the projection of valve stem seal to keep proper clearance between valve guide and stem seal. mm 82E-5 – 98E-5 SERIES 4-25 Model Number of valves Projection 3D82AE 2 valves 15.7 – 16.0 4D84E (S)3D84E 4D88E 18.7 – 19.0 S4D84E 4 valves 9.9 – 10.2 4D94LE (S)4D98E 11.7 – 12.0