1D-53 Engine Mechanical:
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): 09900–20607 (Dial gauge (1/100 mm, 10
mm))
(B): 09900–20701 (Magnetic stand)
(C): 09900–21304 (V-block (100 mm))
Valve head radial runout (IN. & EX.)
Service limit: 0.03 mm (0.001 in)
Valve Stem and Valve Face Wear Condition
• Visually inspect each valve stem and valve face for
wear and pitting. If it is worn or damaged, replace the
valve with a new one.
Valve Stem Deflection
Lift the valve about 10 mm (0.39 in) from the valve seat.
Measure the valve stem deflection in two directions, “X”
and “Y”, perpendicular to each other. Position the dial
gauge as shown. If the deflection exceeds the service
limit, then determine whether the valve or the guide
should be replaced with a new one.
Special tool
(A): 09900–20607 (Dial gauge (1/100 mm, 10
mm))
(B): 09900–20701 (Magnetic stand)
Valve stem deflection (IN. & EX.)
Service limit: 0.25 mm (0.010 in)
(A)
(B)
(C)
I649G1140232-03
I823H1140130-01
(A)
(B)
YY
XX
I823H1140131-01
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