1D-24 Engine Mechanical:
Valve Stem Runout
Support the valve with V-blocks as shown, and check its
runout with the dial gauge. The valve must be replaced if
the runout exceeds the limit.
Special tool
: 09900–20607 (Dial gauge (1/100 mm, 10 mm))
: 09900–20701 (Magnetic stand)
: 09900–21304 (V-block (100 mm))
Valve stem runout (IN. & EX.)
Service limit: 0.05 mm (0.002 in)
Valve Head Radial Runout
Place the dial gauge at a right angles to the valve head
face, and measure the valve head radial runout. If it
exceeds limit, replace the valve.
Special tool
: 09900–20607 (Dial gauge (1/100 mm, 10 mm))
: 09900–20701 (Magnetic stand)
: 09900–21304 (V-block (100 mm))
Valve head radial runout (IN. & EX.)
Service limit: 0.03 mm (0.001 in)
Valve Face Wear
Visually inspect each valve face for wear or damage. If
any abnormal wear is found, replace the respective
valve with a new one. Measure the valve head thickness
“T”. If the valve head thickness is not within the specified
value, replace the value with a new one.
Special tool
: 09900–20101 (Vernier calipers (1/15 mm, 150
mm))
Valve head thickness “T”
Service limit: 0.5 mm (0.02 in)
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, by positioning the
dial gauge as shown. If the deflection measured
exceeds the limit, (see below) then determine whether
the valve or the guide should be replaced with a new
one.
Special tool
: 09900–20607 (Dial gauge (1/100 mm, 10 mm))
: 09900–20701 (Magnetic stand)
Valve stem deflection (IN. & EX.)
Service limit: 0.35 mm (0.014 in)
I827H1140060-01
I827H1140061-01
“T”
I827H1140062-01
I827H1140063-01
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