Engine Mechanical: 1D-33
11) Apply a small quantity of THREAD LOCK “1342” to
the thread of the intake pipe bolt.
: Thread lock cement 99000–32050 (Thread
Lock Cement 1342 or equivalent)
NOTE
• When replacing the intake pipes, identify
the different intake pipes according to
each I.D. code (1).
(1-32F0 for cylinder #1)
(1-32F0 for cylinder #2)
(3-32F0 for cylinder #3)
(3-32F0 for cylinder #4)
• Make sure that the “UP” mark faces up.
Cylinder Head Related Parts Inspection
B649G11406055
Refer to “Cylinder Head Disassembly and Assembly: ”.
Cylinder Head Distortion
1) Decarbonize the combustion chambers.
2) Check the gasket surface of the cylinder head for
distortion. Use a straightedge and thickness gauge.
Take clearance readings at several places. If
readings exceed the service limit, replace the
cylinder head.
Special tool
: 09900–20803 (Thickness gauge)
Cylinder head distortion
Service limit: 0.2 mm (0.008 in)
Valve Stem Runout
Support the valve using V-blocks, as shown, and check
its runout using the dial gauge. If the runout exceeds the
service limit, replace the valve.
Special tool
(A): 09900–20606 (Dial gauge (1/100 mm))
(B): 09900–20701 (Magnetic stand)
(C): 09900–21304 (V-block (100mm))
Valve stem runout
Service limit: 0.05 mm (0.002 in)
Valve Head Radial Runout
Place the dial gauge at a right angle to the valve head
face and measure the valve head radial runout. If it
measures more than the service limit, replace the valve.
Special tool
(A): 09900–20606 (Dial gauge (1/100 mm))
(B): 09900–20701 (Magnetic stand)
(C): 09900–21304 (V-block (100mm))
Valve head radial runout
Service limit: 0.03 mm (0.001 in)
1
I649G1140229-02
I649G1140230-01
(A)
(C)
(B)
I649G1140231-02
(A)
(B)
(C)
I649G1140232-02
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