Valve Stem Seal Replacement - Takeuchi TB 175 Handbuch

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.
Model Number of valves
3TNV82A
4TNV84
2 valves
3TNV84 (T)
4TNV88
4TNV84T
4TNV94L
4 valves
4TNV98 (T)
4TNE106 (T)
mm
Projection
15.7 to 16.0
18.7 to 19.0
9.9 to 10.2
11.7 to 12.0
15.4 to 15.6
Stem seal projection
82
Valve stem seal inserting tool
Stem seal
Valve guide
Cylinder head
Stem seal insertion
Stem seal
Valve guide projection
Valve guide