Nissan Frontier. Instruction — part 724
ENGINE UNIT
EM-85
< UNIT DISASSEMBLY AND ASSEMBLY >
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b. Heat piston to 60
° to 70°C (140° to 158°F) with an industrial use
drier or equivalent.
c. Push out piston pin with stick of outer diameter approximately 19
mm (0.75 in).
20. Remove lower cylinder block bolts.
• Before loosening lower cylinder block bolts, measure crankshaft end play. Refer to
• Loosen lower cylinder block bolts in reverse order as shown in
several different steps.
NOTE:
Use socket (size E14) for bolts No. 1 to 10.
21. Remove lower cylinder block.
• Use Tool to cut liquid gasket for removal.
CAUTION:
Be careful not to damage the mounting surfaces.
22. Remove crankshaft.
CAUTION:
• Be careful not damage or deform signal plate mounted on
crankshaft.
• When setting crankshaft on a flat floor surface, use a
block of wood to avoid interference between signal plate
and the floor surface.
• Do not remove signal plate unless it is necessary to do
so.
NOTE:
When removing or installing signal plate, use socket (size T30).
23. Pull rear oil seal out from rear end of crankshaft.
NOTE:
PBIC1639E
PBIC0262E
PBIC2718E
Tool number
: KV10111100 (J-37228)
SBIA0275E
EM-86
< UNIT DISASSEMBLY AND ASSEMBLY >
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ENGINE UNIT
When replacing rear oil seal without removing lower cylinder block, use a suitable tool to remove the oil
seal installed between crankshaft and cylinder block out.
CAUTION:
Be careful not to damage crankshaft and cylinder block.
24. Remove main bearings and thrust bearings from cylinder block and lower cylinder block.
CAUTION:
• Do not drop main bearing, or scratch the surface.
• Identify installation positions, and store them without mixing them up.
ASSEMBLY
1. Fully air-blow engine coolant and engine oil passages in cylinder block, cylinder bore and crankcase to
remove any foreign material.
WARNING:
Use approved safety glasses to protect your eyes.
2. Apply Silicone RTV Sealant to the drain plugs. Install the drain
plugs on the cylinder block.
• Use Genuine Silicone RTV Sealant, or equivalent. Refer to
21, "Recommended Chemical Products and Sealants"
.
CAUTION:
Do not reuse copper sealing washer.
NOTE:
For Canada, the cylinder block drain plug (3) as shown, is not a
cylinder block drain plug but a block heater.
3. Install main bearings and thrust bearings as follows:
a. Remove dust, dirt, and engine oil from the bearing mating sur-
faces of the cylinder block and lower cylinder block.
b. Install the thrust bearings to both sides of the No. 3 main bearing
journal on the cylinder block.
• Install the thrust bearings with the oil groove facing the crank-
shaft arm (outside).
AWBIA1524ZZ
PBIC0264E
ENGINE UNIT
EM-87
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c. Install the main bearings paying attention to their position and
direction.
• The main bearing with an oil hole and groove goes on the cyl-
inder block. The one without them goes on the lower cylinder
block.
• Only the main bearing (on the cylinder block) for No. 3 journal
has different specifications.
• Before installing the bearings, apply engine oil to the bearing
friction surface (inside). Do not apply oil to the back surface,
but thoroughly clean it.
• When installing, align the bearing stopper to the notch.
• Make sure that the oil holes on the cylinder block and those on
the corresponding bearing are aligned.
4. Install the signal plate to the crankshaft.
a. Position the crankshaft and signal plate using a positioning
dowel pin, and tighten the signal plate bolts to specification.
b. Remove the dowel pin.
CAUTION:
Be sure to remove dowel pin before installing the crank-
shaft.
NOTE:
Dowel pins for the crankshaft and signal plate are supplied as a set for each.
5. Install crankshaft to the cylinder block.
• While turning the crankshaft by hand, check that it turns smoothly.
CAUTION:
Do not install rear oil seal at this time.
6. Apply a continuous bead of liquid gasket using Tool to positions
shown and install the lower cylinder block.
• Use Genuine RTV Silicone Sealant, or equivalent. Refer to
GI-21, "Recommended Chemical Products and Sealants"
CAUTION:
After liquid gasket is applied, the lower cylinder block
installation must be finished within 5 minutes.
NOTE:
Cylinder block and lower cylinder block are machined together.
Neither of them can be replaced separately.
7. Tighten lower cylinder block bolts in three steps in the order as
shown using Tool.
NOTE:
• Apply new engine oil to threads and seat surfaces of the bolts.
CAUTION:
There are more processes to complete the tightening of
lower cylinder bolts. However stop procedure after step 1
and install rear oil seal.
SBIA0277E
Signal plate bolts
Type 1
: 18.5 N·m (1.9 kg-m, 14 ft-lb)
Type 2
: 22.0 N·m (2.2 kg-m, 16 ft-lb)
Tool number
: WS39930000 ( — )
SBIA0278E
WBIA0160E
Tool number
: KV10112100 (BT-8653-A)
KBIA0063E
EM-88
< UNIT DISASSEMBLY AND ASSEMBLY >
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ENGINE UNIT
Apply new engine oil to new rear oil seal and install it using
a suitable tool.
CAUTION:
• Do not touch grease applied onto oil seal lip.
• Be careful not to damage crankshaft and/or cylinder
block.
• Press fit oil seal straight to avoid causing burrs or tilting.
• Install new oil seal in the direction shown.
CAUTION:
Check tightening angle using Tool. Do not tighten by visual
inspection.
• Wipe off completely any protruding Silicone RTV Sealant on
the exterior of engine.
• Check crankshaft side clearance. Refer to
• After installing the bolts, make sure that the crankshaft can be
rotated smoothly by hand.
8. Install the piston to the connecting rod. Assemble the components in their original positions.
a. Using a snap ring pliers, install the snap ring into the grooves of the piston's rear side.
• Insert the piston pin snap ring fully into groove.
Lower cylinder block bolts
Step 1 (bolts 11 - 22)
: 25.1 N·m (2.6 kg-m, 19 ft-lb)
Step 2 (bolts 1 - 10)
: 39.2 N·m (4.0 kg-m, 29 ft-lb)
Step 3 (bolts 1 - 10)
: 60
° - 65° (target: 60°)
SBIA0280E
SEM715A
SBIA0281E
Tool number
: KV10112100 (BT-8653-A)
WBIA0619E
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