REMOVAL SERVICE POINTS |
<<A>> CYLINDER HEAD BOLT REMOVAL |
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Use the special tool Cylinder head
bolt wrench (MB991654) to loosen the cylinder head
bolts. |
<<B>> RETAINER LOCK REMOVAL |
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Compress the valve spring using the
special tool Valve spring compressor (MD998735) and
Retainer holder C (MB992089), then remove the retainer
lock.
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<<C>> VALVE STEM SEAL REMOVAL |
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INSTALLATION SERVICE POINTS |
>>A<< VALVE STEM SEAL INSTALLATION |
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1.The special tool valve
stem seal installer adjustable (MB992922) is composed of the
components
shown in the illustration. 1: Chuck 2: Sleeve 3: Lock nut (small) 4: Outer pipe 5: Lock nut (large) 6: Guide pin (5.9) 7: Guide pin (4.9) 8: Cap 9: Guide pin (5.4) |
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2.Adjust the inside chuck
diameter, obeying the following procedures. (1) Install the sleeve to the chuck as shown in the illustration. (2) Install the shoulder of the valve stem seal to the chuck, aligning with the outer circumference line of the chuck as shown in the illustration. (3) Turn the sleeve to wring the chuck. (4) Stop the sleeve at the position where you can easily remove the valve stem seal by hand. (5) Use the (small) lock nut to fix the sleeve. |
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3.Adjust the stem seal
insertion length, obeying the following procedures. (1) The position, in which the end face of the outer pipe is aligned with the outer circumference line of the chuck, is 0 mm of the insertion length. Insert the chuck and the sleeve into the outer pipe to fit the nut as shown in the illustration. (2) Turn the chuck to adjust the valve stem seal insertion length.
Standard value: 16.0 mm (4) Use the (large) lock nut to fix the sleeve. |
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4.Install the cap to the
guide pin. 5.Install the guide pin as shown in the illustration. 6.Apply the engine oil to the valve stem seal to set the chuck. 7.Install the valve spring seat. |
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8.Use the plastic hammer to
insert the valve stem seal. |
>>B<< VALVE SPRING INSTALLATION |
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Install each valve spring with the
painted end toward the rocker arm. |
>>C<< RETAINER LOCK INSTALLATION |
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Compress the valve spring using the
special tool Valve spring compressor (MD998735) and
Retainer holder C (MB992089), then install the retainer
lock. |
>>D<< CYLINDER HEAD BOLT INSTALLATION |
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1.When reusing a cylinder
head bolt, check that its nominal length (shank length) is
not greater than the limit. If the limit is exceeded,
replace the bolt. Limit: 99.4 mm 2.Apply engine oil to the threads and washer of the bolt. |
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3.Use the special tool
Cylinder head bolt wrench(MB991654) to tighten the bolts to
the
specified torque in the indicated
sequence. Tightening torque: 78 ± 2 N·m 4.Loosen all the bolts completely. 5.Tighten the bolts again to a torque of 20 ± 2 N·m in the indicated sequence. 6.Make paint marks on each bolt’s head and on the cylinder head. |
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7.Turn the bolts 90°
in the tightening direction and in the indicated
sequence. 8.Give another 90° turn in the tightening direction to each bolt, making sure that the paint mark on the bolt head and that on the cylinder head are on the same line.
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