Infiniti Q45. Manual — part 567
CYLINDER BLOCK
EM-85
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ii.
Loosen mounting bolts diagonally.
CAUTION:
●
Be careful not to damage drive plate. Especially, avoid
deforming and damaging of signal plate teeth (circumfer-
ence position).
●
Place drive plate with signal plate surface facing other
than downward.
●
Keep magnetic materials away from signal plate.
b.
Remove engine rear plate.
3.
Lift the engine with hoist to install it onto the widely use engine stand.
CAUTION:
Use an engine stand that has a load capacity [240 kg (529 pound) or more] large enough for sup-
porting the engine weight.
●
If the load capacity of the stand is not adequate, remove the following parts beforehand to reduce the
potential risk of overturning the stand.
–
Remove intake manifold (upper and lower). Refer to
–
Remove fuel injector and fuel tube assembly. Refer to
EM-32, "FUEL INJECTOR AND FUEL TUBE"
–
Remove ignition coil. Refer to
–
Remove rocker cover. Refer to
–
Remove exhaust manifold and three way catalyst. Refer to
–
Other removable brackets.
NOTE:
The figure shows an example of widely use engine stand that
can hold mating surface of transmission with drive plate and
rear plate removed.
CAUTION:
Before removing the hanging chains, make sure the
engine stand is stable and there is no risk of overturning.
4.
.
5.
Drain engine coolant from inside engine by removing water
drain plugs “B” as shown in the figure.
6.
Remove oil pan and oil strainer. Refer to
EM-26, "OIL PAN AND OIL STRAINER"
7.
Remove crankshaft pulley as follows:
PBIC2367E
PBIC0085E
PBIC1265E
EM-86
CYLINDER BLOCK
a.
Lock crankshaft with a hammer handle or similar tool to loosen
crankshaft bolt.
b.
Pull crankshaft pulley with both hands to remove it.
CAUTION:
●
Do not remove crankshaft pulley bolt. Keep loosened
crankshaft pulley bolt in place to protect removed crank-
shaft pulley from dropping.
●
Do not remove balance weight (inner hexagon bolt) at the
front of crankshaft pulley.
8.
Remove the following components and associated parts (The parts listed in step 3 are not included here.)
●
Front cover and timing chain: Refer to
●
Camshaft: Refer to
●
Cylinder head: Refer to
.
9.
Remove knock sensor.
CAUTION:
Carefully handle the sensor, avoiding shocks.
10. Remove piston and connecting rod assembly.
●
Before removing piston and connecting rod assembly, check the connecting rod side clearance. Refer
to
EM-100, "CONNECTING ROD SIDE CLEARANCE"
a.
Position crankshaft pin corresponding to connecting rod to be removed onto the bottom dead center.
b.
Remove connecting rod bearing 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 the cylinder wall and crankshaft
pin, resulting from an interference of connecting rod big
end.
11. Remove connecting rod bearings.
CAUTION:
●
When removing them, note the installation position. Keep them in the correct order.
12. Remove piston rings form piston.
●
Before removing piston rings, check the piston ring side clearance. Refer to
●
Use the piston ring expander (commercial service tool).
CAUTION:
●
When removing piston rings, be careful not to dam-
age piston.
●
Be careful not to damage piston rings by expanding
them excessively.
13. Remove piston from connecting rod as follows.
PBIC0053E
PBIC0086E
PBIC0087E
CYLINDER BLOCK
EM-87
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a.
Using the snap ring pliers, remove snap ring.
b.
Heat piston to 60 to 70
°
C (140 to 158
°
F) with industrial use drier
or equivalent.
c.
Push out piston pin with stick of outer diameter approximately 20
mm (0.8 in).
14. Remove rear oil seal retainer from cylinder block.
●
Insert a screwdriver or similar tool between the rear end of the crankshaft counter weight and rear oil
seal retainer, and separate the liquid gasket to remove.
CAUTION:
Be careful not to damage the mating surface.
15. Using a screwdriver or similar tool, and lever off rear oil seal from rear oil seal retainer.
16. Remove main bearing cap as follows:
●
Before loosening main bearing cap bolts, measure the crankshaft end play. Refer to
.
●
Loosen main bearing cap bolts in several different steps.
a.
Remove cover attached to the rear right side of cylinder block
(next to the starter motor housing).
NOTE:
Bolts (No. 28 shown in the figure) are installed on the inside of
cover.
b.
Loosen the side bolts (M10) starting from 30 to 21 to remove.
c.
Loosen main bearing cap sub bolts (M9) starting from 20 to 11 to
remove.
d.
Loosen main bearing cap bolts (M12) starting from 10 to 1 to
remove.
PBIC0088E
PBIC0089E
EMM0072D
PBIC0090E
EM-88
CYLINDER BLOCK
e.
Using the main bearing cap remover (SST), remove main bear-
ing cap.
17. Remove crankshaft.
18. Remove main bearings and thrust bearings from cylinder block and main bearing caps.
CAUTION:
When removing them, note the installation position. Keep them in the correct order.
19. If pilot converter must be removed, remove it from the rear end
of crankshaft using the pilot bushing puller (SST).
ASSEMBLY
1.
Fully air-blow engine coolant and engine oil passages in cylinder block, the cylinder bore, and crankcase
to remove any foreign material.
CAUTION:
Use a goggles to protect your eye.
2.
Install each plug to the cylinder block. (Only screwed-type plugs
are shown in the figure.)
●
Apply sealant to the thread of each plug “A” and “D”.
Use Genuine High Strength Locking Sealant or equiva-
lent. Refer to
GI-45, "RECOMMENDED CHEMICAL PROD-
●
Apply sealant to the thread of each plug “B” and “C”.
Use Anaerobic Liquid Gasket or equivalent. Refer to
45, "RECOMMENDED CHEMICAL PRODUCTS AND SEAL-
ANTS"
.
●
Replace copper washers with new ones.
●
Tighten each plug as specified below.
PBIC0091E
PBIC0092E
PBIC1265E
Part
Washer
Tightening torque
A
Yes
53.9 N·m (5.5 kg-m, 40 ft-lb)
B
No
19.6 N·m (2.0 kg-m, 15 ft-lb)
C
Yes
62.7 N·m (6.4 kg-m, 46 ft-lb)
D
Yes
62.7 N·m (6.4 kg-m, 46 ft-lb)
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