VALVE LIFTER AND PUSH ROD
Valve lifter
1. Check valve lifters for excessive wear on the surfaces.
2. Replace with new ones if worn beyond repair.
a. Valve lifter end should be smooth.
b. Valve lifter to lifter hole clearance:Standard0.030 - 0.073 mm (0.0012 - 0.0029 in)
Limit Less than 0.20 mm (0.0079 in)
Valve lifter outer diameter ªAº: Standard25.960 - 25.970 mm (1.0220 - 1.0224 in)
Cylinder block valve lifter hole diameter ªBº: Standard26.000 - 26.033 mm (1.0236 - 1.0249 in)
Push rod
1. Inspect push rod for excessive wear on the surfaces.
2. Replace if worn or damaged beyond repair.
3. Check push rod for bend using a dial gauge. Maximum allowable bend
(Total indicator reading):Less than 0.5 mm (0.020 in)
ROCKER SHAFT AND ROCKER ARM
1. Check valve rockers, brackets and rocker shafts for scoring,wear or distortion. Replace if necessary.
SEM636B
CYLINDER HEADTD27Ti
Inspection (Cont'd)
EM-111
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2. Check clearance between valve rockers and rocker shaft. Ifspecified clearance is exceeded, replace affected valve rockers
or shaft.Specified clearance: LimitLess than 0.15 mm (0.0059 in)
Rocker shaft outer diameter ªAº: Standard19.979 - 20.000 mm (0.7866 - 0.7874 in)
Rocker arm inner diameter ªBº: Standard20.014 - 20.035 mm (0.7880 - 0.7888 in)
3. Check rocker shaft bend at its center. If bend is greater than specified limit, replace rocker shaft.Rocker shaft bend
(Total indicator reading): LimitLess than 0.3 mm (0.012 in)
MEASURING CYLINDER HEAD TO VALVE DISTANCE
Measure distance from cylinder head surface to intake and exhaust
valves. If specified distance is exceeded, replace valve(s) or valve
seat(s). Specified distance:StandardIntake0.8 - 1.2 mm
(0.031 - 0.047 in)
Exhaust 0.8 - 1.2 mm
(0.031 - 0.047 in)
Limit Less than 1.75 mm (0.0689 in)
for intake and exhaust valves
SEM027
SEM028
SEM026
CYLINDER HEADTD27Ti
Inspection (Cont'd)
EM-112
http://vnx.su/
