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Balance Shaft: Service and Repair






REMOVAL SERVICE POINTS


OIL PAN REMOVAL

1. Remove all oil pan bolts.







2. Drive in the service tool between the cylinder block and oil pan.

NOTE: Never use a screwdriver or chisel, instead of the service tool. as a deformed oil pan flange will result in oil leakage.


PLUG REMOVAL






1. If the plug is too tight, hit the plug head with a hammer two to three times, and the plug will be easily loosened.



FLANGE BOLT REMOVAL







1. Remove the plug on the side of cylinder block.
2. Insert a Phillips screwdriver - shank diameter 8 mm (.32 in.) - into the plug hole to lock the silent shaft.






3. Loosen the flange bolt.


SILENT SHAFT FRONT BEARING REMOVAL







1. Using the special tool remove the silent shaft front bearing from the cylinder block.

NOTE: Be sure to remove the front bearing first. If it has not been removed. the Rear Bearing Puller cannot be used.



LEFT SILENT SHAFT REAR BEARING REMOVAL






1. Using the special tool, remove the left silent shaft rear bearing from the cylinder block.



REAR BEARING REMOVAL






1. Using the special tool, remove the right silent shaft rear bearing from the cylinder block.



INSPECTION

FRONT CASE

1. Check oil holes for clogging and clean if necessary.
2. Check left silent shaft front bearing section for wear damage and seizure. If there is anything wrong with the section, replace the front case.
3. Check the front case for cracks and other damage. Replace cracked or damaged front case.

OIL SEAL

1. Check the oil seal lip for wear and damage. Replace oil seal if necessary.
2. Check the oil seal lip for deterioration. Replace oil seal if necessary.



SILENT SHAFT






1. Check oil holes for clogging.
2. Check journal for seizure, damage and contact with bearing. If there is anything wrong with the journal, replace silent shaft, bearing or front case assembly.


OIL PUMP





1. Assemble the oil pump gear to the front case and rotate it to ensure smooth rotation with no looseness.
2. Ensure that there is no ridge wear on the contact surface between the front case and the gear surface of the oil pump cover.
3. Check the side clearance

Standard value:

Drive gear 0.08- 0.14 mm (.0031 - .0055 in.)
Driven gear 0.06-0.12 mm (.0024 - .0047 in.)


OIL COOLER BYPASS VALVE
(ENGINE WITH AIR COOLING TYPE OIL COOLER)

1. Make sure that the valve moves smoothly.






2. Ensure that the dimension (L) measures the standard value under normal temperature and humidity.

Standard value (L): 34.5 (1.358 in.)

3. The dimension must be the standard value when measured after the valve has been dipped in 100°C (212°F) oil.

Standard value (L): 40 mm (1.57 in.) or more


INSTALLATION SERVICE POINTS




SILENT SHAFT OIL SEAL INSTALLATION





OIL PUMP OIL SEAL INSTALLATION





CRANKSHAFT FRONT OIL SEAL INSTALLATION
1. Using the special tool, install the crankshaft front oil seal into the front case.



OIL PUMP DRIVEN GEAR / OIL PUMP DRIVE GEAR INSTALLATION






1. Apply engine oil amply to the gears and line up the alignment marks.



SEALANT APPLICATION TO OIL PRESSURE GAUGE UNIT






1. Coat the threads of switch with sealant and install the switch using the special tool.

Specified sealant: 3M ATD Part No.8660 or equivalent. Keep the end of threaded portion clear of sealant. Avoid an overtightening.



SEALANT APPLICATION TO OIL PRESSURE SWITCH






1 Coat the threads of switch with sealant and install the switch using the special tool.

Specified sealant: 3M ATD Part No.8660 or equivalent. Keep the end of threaded portion clear of sealant. Avoid an overtightening.



RIGHT SILENT SHAFT REAR BEARING INSTALLATION







1. Apply engine oil to the outer surface of bearing.

2. Using special tools. install right rear bearing. Make sure that oil hole of bearing is aligned with oil hole of cylinder block.


LEFT SILENT SHAFT REAR BEARING INSTALLATION





1. Install the special tool (GUIDE PLATE) tool to the cylinder block.
2. Apply engine oil to the rear bearing outer circumference and bearing hole in cylinder block.






3. Using the special tool, install the rear bearing.

NOTE: The left rear bearing has no oil holes.



SILENT SHAFT FRONT BEARING INSTALLATION






1. Using special tools, install front bearing.



FRONT CASE INSTALLATION






1. Set the special tool on the front end of crankshaft and apply a thin coat of engine oil to the outer circumference of the special tool to install the front case.






2. Install the front case assembly through a new front case gasket and temporarily tighten the flange bolts (other than those for tightening the filter bracket).



FLANGE BOLT INSTALLATION






1. Insert a Phillips screwdriver into a hole in the left side of the cylinder block to lock the silent shaft.






2. Secure the oil pump driven gear onto the left silent shaft by tightening the flange bolt to specified torque.



PLUG INSTALLATION






1. Install a new 0-ring to the groove of front case.
2. Using the special tool, install the plug and tighten to specified torque.


OIL PAN INSTALLATION






1. Clean both mating surfaces of oil pan and cylinder block.
2. Apply a 4 mm (.16 in.) wide bead of sealant to the entire circumference of the oil pan flange.

Specified sealant: MITSUBISHI GENUINE PART No. MD970389 or equivalent

3. The oil pan should be installed in 15 minutes after the application of sealant.






4. Note the difference in bolt lengths at the location shown.
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