Nissan Qashqai J11. Manual — part 71
CYLINDER BLOCK
EM-223
< UNIT DISASSEMBLY AND ASSEMBLY >
[MR20DD]
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Disassembly and Assembly
INFOID:0000000010715516
DISASSEMBLY
1.
Remove oil pan (upper). Refer to
.
2.
Remove thermostat housing. Refer to
3.
Remove knock sensor.
CAUTION:
Handle it carefully and avoid impacts.
4.
Remove crankshaft position sensor (POS) cover and crankshaft position sensor (POS).
CAUTION:
• Handle crankshaft position sensor (POS) carefully and avoid impacts.
• Never disassemble.
• Never place crankshaft position sensor (POS) in a location where it is exposed to magnetism.
5.
Remove oil filter (for intake valve timing control).
6.
Remove piston and connecting rod assembly with the following procedure:
• Before removing piston and connecting rod assembly, check the connecting rod side clearance. Refer to
.
a.
Position crankshaft pin corresponding to connecting rod to be removed onto the bottom dead center.
b.
Remove connecting rod cap.
c.
Using a hammer handle or similar tool, push piston and connect-
ing rod assembly out to the cylinder head side.
CAUTION:
• Be careful not to damage matching surface with connect-
ing rod cap.
• Be careful not to damage the cylinder wall and crankshaft
pin, resulting from an interference of the connecting rod
big end.
7.
Remove connecting rod bearings.
CAUTION:
When removing them, note the installation position. Keep them in the correct.
Oil pressure switch
Oil tempareture sensor
Oil jet
Top ring
Second ring
Oil ring
Snap ring
Piston
Piston pin
Connecting rod
Thrust bearing
Connecting rod bearing (upper)
Main bearing (upper)
Crankshaft key
Main bearing (lower)
Connecting rod bearing (lower)
Connecting rod cap
Connecting rod cap bolt
Main bearing cap
Main bearing cap bolt
Crankshaft
Signal plate
Rear oil seal
Comply with the installation procedure
when tightening. Refer to
: Always replace after every disassembly.
: N·m (kg-m, ft-lb)
: N·m (kg-m, in-lb)
: Sealing point
: Should be lubricated with oil.
: Select with proper thickness.
PBIC0259E
EM-224
< UNIT DISASSEMBLY AND ASSEMBLY >
[MR20DD]
CYLINDER BLOCK
8.
Remove piston rings form piston.
• Before removing piston rings, check the piston ring side clearance. Refer to
.
• Use a piston ring expander (commercial service tool) (A).
CAUTION:
• When removing piston rings, be careful not to damage
the piston.
• Be careful not to damage piston rings by expanding
them excessively.
9.
Remove piston from connecting rod with the following procedure:
a.
Using snap ring pliers (A), remove snap rings.
b.
Heat piston to 60 to 70
°
C (140 to 158
°
F) with an industrial use
drier (A) or equivalent.
c.
Push out piston pin with stick (A) of outer diameter approxi-
mately 18 mm (0.71 in).
10. Remove main bearing cap bolts.
• Measure crankshaft end play before loosening main bearing cap bolts. Refer to
.
JSBIA2493ZZ
JSBIA2494ZZ
JSBIA2495ZZ
JSBIA2496ZZ
CYLINDER BLOCK
EM-225
< UNIT DISASSEMBLY AND ASSEMBLY >
[MR20DD]
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• Loosen and remove main bearing cap bolts in the order from
10 to 1 as shown in the figure.
• Use TORX socket.
11. Remove main bearing caps.
• Tap main bearing caps lightly with a plastic hammer for removal.
CAUTION:
Be careful not to damage the mounting surface.
12. Remove crankshaft.
CAUTION:
• Be careful not to damage or deform signal plate
mounted on rear end of crankshaft
.
• When setting crankshaft on a flat floor surface, use a
block of wood to avoid interference between signal plate
and the floor surface.
• Never remove signal plate unless it is necessary to do so.
NOTE:
When removing or installing signal plate, use TORX socket.
13. Pull rear oil seal out from rear end of crankshaft.
14. Remove main bearings and thrust bearings from cylinder block and main bearing caps.
CAUTION:
Identify installation positions, and store them without mixing them up.
ASSEMBLY
CAUTION:
Do not reuse O-rings or washers.
1.
Fully air-blow engine coolant and engine oil passages in cylinder block, cylinder bore and crankcase to
remove any foreign material.
CAUTION:
Use a goggles to protect your eye.
2.
Install each plug to cylinder block as shown in the figure.
CAUTION:
Do not reuse washer.
• Apply liquid gasket to the thread of water drain plug
.
Use Genuine Liquid Gasket (Three Bond 1215) or equiva-
lent.
• Apply sealant to the thread of plug
.
Use genuine high strength thread locking sealant (Three
Bond 1386B) or equivalent.
NOTE:
Do not apply liquid gasket or high strength thread locking sealant to the plug
.
• Tighten each plug as specified below.
: Engine front
JSBIA4604ZZ
PBIC3234J
: Washer
: Engine front
PBIC3999E
EM-226
< UNIT DISASSEMBLY AND ASSEMBLY >
[MR20DD]
CYLINDER BLOCK
3.
Install main bearings and thrust bearings with the following procedure:
a.
Remove dust, dirt, and engine oil on the bearing mating surfaces of cylinder block and main bearing cap.
b.
Install thrust bearings to the both sides of the No. 3 journal hous-
ing
on cylinder block.
• Install thrust bearings with the oil groove
facing crankshaft
arm (outside).
c.
Install the main bearings paying attention to the direction.
• Before installing main bearings, apply new engine oil to the bearing surface (inside). Do not apply new
engine oil to the back surface, but thoroughly clean it.
• When installing, align main bearing to the center position of cylinder block and main bearing cap.
• The difference
between main bearing (upper)
and main
bearing (lower)
should be 0.85 mm (0.0335 in) or less when
installing.
• Ensure the oil holes on cylinder block and oil holes
on the
main bearings
are aligned.
4.
Install signal plate to crankshaft if removed.
a.
Set the signal plate with the flange facing toward the counter weight side (engine front side) to the crank-
shaft rear surface.
b.
Apply new engine oil to threads and seat surfaces of mounting bolts.
Part
Washer
Tightening torque
Yes
54.0 N·m (5.5 kg-m, 40 ft-lb)
No
19.6 N·m (2.0 kg-m, 14 ft-lb)
No
9.8 N·m (1.0 kg-m, 87 in-lb)
: Engine front
PBIC3258J
: Cylinder block
: Main bearing cap
PBIC3237J
PBIC3236J
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