Qashqai J11. Engine mechanical (HRA2DDT, K9K, MR20DD) — part 13
TIMING CHAIN
EM-193
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[MR20DD]
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d.
Install front cover, and tighten mounting bolts in the order from 1
to 22 as shown in the figure.
• Refer to the following for the installation position of bolts.
CAUTION:
Attaching should be done within 5 minutes after liquid gas-
ket application.
e.
After all bolts are tightened, retighten them to specified torque in
numerical order as shown in the figure.
CAUTION:
Be sure to wipe off any excessive liquid gasket leaking.
12. Install VTC cover according to the following instructions:
a.
a.Apply liquid gasket
(Three Bond 1217H or an equivalent)
evenly (no break, no overlap) to the position shown in the figure.
Refer to
.
CAUTION:
Install within 5 minutes after applying liquid gasket.
NOTE:
Overlap the start and end of liquid gasket application positions
at least 5 mm.
M6 bolt
: No. 1
: 6.6 N·m (0.67 kg-m, 58 in-lb)
M10 bolts
: No. 6, 7, 10, 13, 21
: 55.0 N·m (5.6 kg-m, 41 ft-lb)
M12 bolts
: No. 2, 4, 8, 11
: 75.0 N·m (7.7 kg-m, 55 ft-lb)
M8 bolts
: Except the above
: 25.0 N·m (2.6 kg-m, 19 ft-lb)
JPBIA6821ZZ
: Front cover
: VTC cover
: Start/End of liquid gasket application
: 4.0 – 5.6 mm
:
φ
3.4 – 4.4 mm
JPBIA6823ZZ
EM-194
< UNIT DISASSEMBLY AND ASSEMBLY >
[MR20DD]
TIMING CHAIN
b.
Install O-ring to the groove of front cover
.
CAUTION:
Oil filter must be inserted to the end of O-ring installation
part.
c.
Tighten mounting bolts to the specified torque in the order from
1 to 8 as shown in the figure.
CAUTION:
After tightening mounting bolts, wipe out extra liquid gas-
ket.
NOTE:
Bolt 1 must be tightened twice, the second tightening is shown
by 6.
13. Install crankshaft pulley with the following procedure:
a.
When inserting crankshaft pulley with a plastic hammer, tap on its center portion (not circumference).
CAUTION:
Never damage front oil seal lip portion.
b.
Secure crankshaft pulley
with a pulley holder (commercial
service tool)
.
c.
Apply new engine oil to thread and seat surfaces of crankshaft
pulley bolt.
d.
Tighten crankshaft pulley bolt.
e.
Put a paint mark
on crankshaft pulley
, matching with any
one of six easy to recognize angle marks
on crankshaft pulley
bolt
flange.
f.
Turn another 60 degrees clockwise (angle tightening).
• Check the tightening angle with movement of one angle mark.
g.
Check that crankshaft rotates clockwise smoothly.
14. Install remaining parts in the reverse order of removal.
Inspection
INFOID:0000000010715501
INSPECTION AFTER REMOVAL
Timing Chain
: O-ring installation position
JPBIA6824ZZ
JPBIA6820ZZ
: 29.4 N·m (3.0 kg-m, 22 ft-lb)
PBIC3961E
PBIC3963E
TIMING CHAIN
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Check for cracks
and any excessive wear
at link plates and
roller links of timing chain. Replace timing chain if necessary.
INSPECTION AFTER INSTALLATION
Inspection for Leakage
The following are procedures for checking fluids leakage, lubricates leakage, and exhaust gases leakage.
• Before starting engine, check oil/fluid levels including engine coolant and engine oil. If less than required
quantity, fill to the specified level. Refer to
MA-59, "Fluids and Lubricants"
.
• Use procedure below to check for fuel leakage.
- Turn ignition switch “ON” (with engine stopped). With fuel pressure applied to fuel piping, check for fuel leak-
age at connection points.
- Start engine. With engine speed increased, check again for fuel leakage at connection points.
• Run engine to check for unusual noise and vibration.
NOTE:
If hydraulic pressure inside chain tensioner drops after removal/installation, slack in guide may generate a
pounding noise during and just after the engine start. However, this does not indicate an unusualness. Noise
will stop after hydraulic pressure rises.
• Warm up engine thoroughly to check there is no leakage of fuel, or any oil/fluids including engine oil and
engine coolant.
• Bleed air from lines and hoses of applicable lines, such as in cooling system.
• After cooling down engine, again check oil/fluid levels including engine oil and engine coolant. Refill to the
specified level, if necessary.
Summary of the inspection items:
*: Power steering fluid, brake fluid, etc.
PBIC3169J
Items
Before starting engine
Engine running
After engine stopped
Engine coolant
Level
Leakage
Level
Engine oil
Level
Leakage
Level
Transmission /
transaxle fluid
AT & CVT Models
Leakage
Level / Leakage
Leakage
MT Models
Level / Leakage
Leakage
Level / Leakage
Other oils and fluids*
Level
Leakage
Level
Fuel
Leakage
Leakage
Leakage
Exhaust gases
—
Leakage
—
EM-196
< UNIT DISASSEMBLY AND ASSEMBLY >
[MR20DD]
CAMSHAFT
CAMSHAFT
Exploded View
INFOID:0000000010715502
JSBIA1181GB
Exhaust valve timing control position sensor
O-ring
Camshaft bracket
Camshaft (EXH)
Camshaft sprocket (EXH)
Camshaft sprocket (INT)
Camshaft (INT)
Valve lifter (EXH)
Valve lifter (INT)
Signal plate (INT)
Signal plate (EXH)
O-ring
Camshaft position sensor (PHASE)
Comply with the assembly procedure when
tightening. Refer to
: N·m (kg-m, ft-lb)
: N·m (kg-m, in-lb)
: Always replace after every disassembly.
: Should be lubricated with oil.
: Sealing point
: Select with proper thickness.
CAMSHAFT
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Removal and Installation
INFOID:0000000010715503
CAUTION:
The rotating direction in the text indicates all directions seen from the engine front.
REMOVAL
1.
Remove the following parts.
• Intake manifold: Refer to
.
• Rocker cover: Refer to
• Front cover and timing chain related parts: Refer to
.
NOTE:
Removal of oil pump drive related part is not necessary.
2.
Remove camshaft position sensor (PHASE) and exhaust valve timing control position sensor from cam-
shaft bracket.
CAUTION:
• Handle camshaft position sensor (PHASE) and exhaust valve timing control position sensor
carefully and avoid impacts.
• Never disassemble camshaft position sensor (PHASE) and exhaust valve timing control position
sensor.
• Never place sensor where it is exposed to magnetism.
3.
Put the matching mark
on the camshaft sprocket (INT)
,
camshaft sprocket (EXH)
and the camshaft bracket
as
shown in the figure.
NOTE:
It prevents the knock pin of the camshaft (INT) from engaging
with the incorrect pin hole when installing the camshaft sprocket
(INT).
4.
Remove camshaft sprockets (INT and EXH).
• Secure hexagonal part
of camshaft with a wrench. Loosen
camshaft sprocket mounting bolts and remove camshaft
sprocket.
CAUTION:
• Never rotate crankshaft or camshaft while timing chain
is removed. It causes interference between valve and
piston.
• Never loosen the mounting bolts with securing anything
other than the camshaft hexagonal part or with tensioning the timing chain.
5.
Remove camshaft bracket with the following procedure:
a.
Loosen mounting bolts in reverse order as shown in the figure.
JPBIA4404ZZ
: Camshaft sprocket (INT)
: Camshaft sprocket (EXH)
JPBIA4405ZZ
: Engine front
JPBIA4406ZZ
EM-198
< UNIT DISASSEMBLY AND ASSEMBLY >
[MR20DD]
CAMSHAFT
b.
Cut liquid gasket by prying the position (
) shown in the figure,
and then remove the camshaft bracket.
CAUTION:
• Never damage the mating surface.
• A more adhesive liquid gasket is applied compared to pre-
vious types when shipped, so it should not be forced off
the position not specified.
6.
Remove camshafts.
7.
Remove valve lifters.
• Identify installation positions, and store them without mixing them up.
8.
Remove signal plate from camshaft, if necessary.
INSTALLATION
CAUTION:
Do not reuse O-rings.
1.
Install valve lifters.
• Install them in the original positions.
2.
Install camshafts.
• Clean camshaft journal to remove any foreign material.
• Distinguish between the intake and the exhaust by looking at
the different shapes of the front and rear ends of the camshaft
or using the identification colors
and
.
• Install camshafts so that camshaft dowel pins
on the front
side are positioned as shown in the figure.
NOTE:
Though camshaft does not stop at the positions as shown in
the figure, for the placement of cam nose, it is generally
accepted camshaft is placed for the same direction of the fig-
ure.
3.
Install camshaft bracket with the following procedure:
a.
Remove foreign material completely from camshaft bracket backside and from cylinder head installation
face.
: Engine front
JPBIA4407ZZ
: Camshaft (EXH)
: Camshaft (INT)
Identification color
Camshaft (EXH)
—
Brown
Camshaft (INT)
Purple
—
: Camshaft (EXH)
: Camshaft (INT)
JPBIA4408ZZ
JPBIA4409ZZ
CAMSHAFT
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b.
Apply liquid gasket
to camshaft bracket as shown in the fig-
ure.
Use Genuine Liquid Gasket (Three Bond 1217H) or equiva-
lent.
c.
Tighten mounting bolts of camshaft brackets in the following
steps, in numerical order as shown in the figure.
• There are two types of mounting bolts. Refer to the following
for locating bolts.
i.
Tighten mounting bolts in numerical order.
ii.
Tighten mounting bolts in numerical order.
iii.
Tighten mounting bolts in numerical order.
CAUTION:
After tightening mounting bolts of camshaft brackets, be sure to wipe off excessive liquid gasket
from the mating surface of cylinder head.
4.
Install the camshaft sprocket to the camshaft with the following procedure.
: Plug hole inner wall
:
φ
3.4 - 4.4 mm (0.134 - 0.173 in)
: Engine front
: Engine outside
JPBIA4410ZZ
: Engine front
M6 bolts [thread length: 57.5 mm (2.264 in)]
: 13, 14, and 15 in the figure
M6 bolts [thread length: 35.0 mm (1.378 in)]
: Except the above
: 1.96 N·m (0.20 kg-m, 17 in-lb)
: 5.88 N·m (0.60 kg-m, 52 in-lb)
: 9.5 N·m (0.97 kg-m, 84 in-lb)
JPBIA4406ZZ
EM-200
< UNIT DISASSEMBLY AND ASSEMBLY >
[MR20DD]
CAMSHAFT
a.
When the camshaft sprocket (INT)
and camshaft sprocket
(EXH)
is removed, refer to the paint mark
put according to
step “3”. Securely align the knock pin and the pin hole, and then
install them.
b.
Tighten bolts in the following steps.
• Secure the hexagonal part of camshaft using wrench to tighten mounting bolt.
i.
Tighten camshaft mounting bolt.
ii.
Turn 30 degrees clockwise (angle tightening).
CAUTION:
Check the tightening angle by using an angle wrench [SST:
KV10112100] (B) or protractor. Never judge by visual
inspection without an angle wrench.
5.
Install timing chain and related parts. Refer to
.
6.
Inspect and adjust valve clearance. Refer to
EM-133, "Inspection and Adjustment"
7.
Install remaining parts in the reverse order of removal.
Inspection
INFOID:0000000010715504
INSPECTION AFTER REMOVAL
Camshaft Runout
1.
Put V-block on a precise flat table, and support No. 2 and 5 journal of camshaft.
CAUTION:
Never support No. 1 journal (on the side of camshaft sprocket) because it has a different diameter
from the other four locations.
2.
Set dial indicator (A) vertically to No. 3 journal.
3.
Turn camshaft to one direction with hands, and measure the
camshaft runout on dial indicator. (Total indicator reading)
4.
If it exceeds the limit, replace camshaft.
Camshaft Cam Height
: Camshaft bracket
JPBIA4404ZZ
: 35.0 N·m (3.6 kg-m, 26 ft-lb)
: Camshaft sprocket
: Camshaft hexagonal part
JPBIA4412ZZ
Standard and Limit
: Refer to
.
JSBIA2445ZZ
CAMSHAFT
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1.
Measure the camshaft cam height with a micrometer (A).
2.
If it exceeds the limit, replace camshaft.
Camshaft Journal Oil Clearance
CAMSHAFT JOURNAL OUTER DIAMETER
Measure the outer diameter of camshaft journal with a micrometer
(A).
CAMSHAFT BRACKET INNER DIAMETER
• Tighten camshaft bracket bolts with specified torque. Refer to
EM-197, "Removal and Installation"
• Measure the inner diameter of camshaft bracket with a cylinder
gauge .
CAMSHAFT JOURNAL OIL CLEARANCE
• (Oil clearance) = (Camshaft bracket inner diameter) – (Camshaft journal diameter)
• If it exceeds the limit, replace camshaft or cylinder head, or both.
NOTE:
Camshaft bracket cannot be replaced as a single part, because it is machined together with cylinder head.
Replace whole cylinder head assembly.
Camshaft End Play
1.
Install camshaft in cylinder head. Refer to
EM-197, "Removal and Installation"
.
Standard and Limit
: Refer to
.
JPBIA6382ZZ
Standard
: Refer to
JPBIA6337ZZ
: Measuring direction of inner diameter
Standard
: Refer to
PBIC3180J
Standard and Limit
: Refer to
.
EM-202
< UNIT DISASSEMBLY AND ASSEMBLY >
[MR20DD]
CAMSHAFT
2.
Install dial indicator in thrust direction on front end of camshaft.
Read the end play of dial indicator
when camshaft is moved
forward/backward (in direction to axis).
• Measure the following parts if out of the standard.
- Dimension (A) for groove of cylinder head No. 1 journal
- Dimension (B) for camshaft flange
• Refer to the standards above, and then replace camshaft and/
or cylinder head.
Camshaft Sprocket Runout
1.
Put V-block on precise flat table, and support No. 2 and 5 journals of camshaft.
CAUTION:
Never support No. 1 journal (on the side of camshaft sprocket) because it has a different diameter
from the other four locations.
2.
Measure the camshaft sprocket runout with a dial indicator (A).
(Total indicator reading)
• If it exceeds the limit, replace camshaft sprocket.
Valve Lifter
Check if surface of valve lifter has any wear or cracks.
• If anything above is found, replace valve lifter. Refer to
.
Valve Lifter Clearance
VALVE LIFTER OUTER DIAMETER
Standard and Limit
: Refer to
.
PBIC3181J
Standard
: 4.000 - 4.030 mm (0.1575 - 0.1587 in)
Standard
: 3.877 - 3.925 mm (0.1526 - 0.1545 in)
PBIC3183J
Limit
: Refer to
.
JPBIA4413ZZ
KBIA0182E
CAMSHAFT
EM-203
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[MR20DD]
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• Measure the outer diameter of valve lifter with a micrometer (A).
VALVE LIFTER HOLE DIAMETER
Measure the inner diameter of valve lifter hole of cylinder head with
an inside micrometer
.
VALVE LIFTER CLEARANCE
• (Valve lifter clearance) = (Valve lifter hole diameter) – (Valve lifter
outer diameter)
• If out of the standard, referring to the each standard of valve lifter
outer diameter and valve lifter hole diameter, replace either or both
valve lifter and cylinder head.
INSPECTION AFTER INSTALLATION
Inspection of Camshaft Sprocket (INT), (EXH) Oil Groove
CAUTION:
• Perform this inspection only when DTC P0011 or P0014 is detected in self-diagnostic results of CON-
SULT and it is directed according to inspection procedure of EC section. Refer to
(P0011) or
ECM-161, "Diagnosis Procedure"
• Check when engine is cold so as to prevent burns by the splashing engine oil.
1.
Check engine oil level. Refer to
2.
Perform the following procedure so as to prevent the engine from being unintentionally started while
checking.
a.
Release the fuel pressure. Refer to
.
b.
Remove intake manifold. Refer to
c.
Disconnect ignition coil and injector harness connectors.
d.
Support the bottom surface of engine using a transmission jack, and then remove the engine mounting
bracket (RH) and engine mounting insulator (RH). Refer to
.
3.
Remove intake or exhaust valve timing control solenoid valve. Refer to
.
• Lift the front side of the engine with a jack base to remove intake or exhaust valve timing control sole-
noid valve.
4.
Clean the mounting area of intake or exhaust valve timing control solenoid valve, and then insert a clean
waste with no oil adhesion into the oil hole of the cylinder head.
5.
Install engine mounting insulator (RH) and engine mounting bracket (RH). (After the removal of intake or
exhaust valve timing control solenoid valve and insertion of a waste into the oil hole.)
6.
Perform cranking to check that engine oil comes out from the oil hole (mounting hole of intake or exhaust
valve timing control solenoid valve) of cylinder head.
• Regarding the engine oil check, judge it by the amount of oil adhered to the wasted inserted into the oil
hole.
WARNING:
• Never insert fingers into the oil hole.
• Never touch rotating parts (drive belt, idler pulleys and crankshaft pulley, etc.).
CAUTION:
Standard
: Refer to
.
JPBIA0125ZZ
Standard
: Refer to
.
Standard
: Refer to
.
PBIC3184J
EM-204
< UNIT DISASSEMBLY AND ASSEMBLY >
[MR20DD]
CAMSHAFT
• Never perform cranking without installing the engine mounting insulator (RH) and engine mount-
ing bracket (RH).
• Prevent splashing by using a shop cloth so as to prevent the worker from injury from engine oil
and so as to prevent engine oil contamination.
• Prevent splashing by using a shop cloth so as to prevent engine oil from being splashed to
engine and vehicle. Especially, be careful not to apply engine oil to rubber parts of drive belt,
engine mounting insulator, etc. Wipe engine oil off immediately if it is splashed.
7.
Perform the following inspection if engine oil does not come out from intake or exhaust valve timing con-
trol solenoid valve oil hole of the cylinder head.
• Clean oil groove between oil strainer and intake valve timing control solenoid valve. Refer to
LU-21, "Engine Lubrication System Schematic"
8.
Remove components between intake or exhaust valve timing control solenoid valve and camshaft
sprocket (INT) or (EXH), and then check each oil groove for clogging.
• Clean oil groove if necessary. Refer to
LU-20, "Engine Lubrication System"
.
9.
After inspection, install removed parts in the reverse order.
OIL SEAL
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OIL SEAL
VALVE OIL SEAL
VALVE OIL SEAL : Removal and Installation
INFOID:0000000010715505
REMOVAL
1.
Remove camshafts. Refer to
.
2.
Remove valve lifters. Refer to
.
3.
Rotate crankshaft, and set piston whose valve oil seal is to be removed to TDC. This will prevent valve
from dropping into cylinder.
CAUTION:
When rotating crankshaft, be careful to avoid scarring front cover with timing chain.
4.
Remove valve collet.
• Compress valve spring with the valve spring compressor [SST:
KV10116200] (A), the attachment [SST: KV10115900] (C), and
the adapter [SST: KV10109220] (B). Remove valve collet with
magnet hand.
CAUTION:
• Never damage valve lifter holes.
• Fit the attachment [SST: KV10115900] in the center of
valve spring retainer to press it.
5.
Remove valve spring retainer and valve spring (with valve spring seat).
CAUTION:
Never remove valve spring seat from valve spring.
6.
Remove valve oil seal with the valve oil seal puller [SST:
KV10107902] .
INSTALLATION
1.
Apply new engine oil to valve oil seal joint surface and seal lip.
JPBIA1365ZZ
: Valve spring retainer
: Attachment
JPBIA4477ZZ
PBIC3210J
EM-206
< UNIT DISASSEMBLY AND ASSEMBLY >
[MR20DD]
OIL SEAL
2.
Press in valve oil seal to the height (H) shown in the figure with
the valve oil seal drift [SST: KV10115600]
.
3.
Install in the reverse order of removal, for the rest of parts.
FRONT OIL SEAL
FRONT OIL SEAL : Removal and Installation
INFOID:0000000010715506
REMOVAL
1.
Remove the following parts.
• Front fender protector (RH): Refer to
• Drive belt: Refer to
.
• Crankshaft pulley: Refer to
.
2.
Remove front oil seal with a suitable tool.
CAUTION:
Never damage front cover and crankshaft.
INSTALLATION
1.
Apply new engine oil to new front oil seal joint surface and seal lip.
2.
Install front oil seal so that each seal lip is oriented as shown in
the figure.
• Press-fit front oil seal using a suitable drift with outer diameter 57 mm (2.24 in) and inner diameter 45
mm (1.77 in).
CAUTION:
• Never damage front cover and crankshaft.
• Press-fit oil seal straight to avoid causing burrs or tilting.
3.
Install in the reverse order of removal, for the rest of parts.
REAR OIL SEAL
REAR OIL SEAL : Removal and Installation
INFOID:0000000010715507
REMOVAL
Height (H)
: 15.1 - 15.7 mm (0.594 - 0.618 in)
PBIC3211J
: Dust seal lip
: Oil seal lip
: Engine outside
: Engine inside
PBIC3485J
Within 0.3 mm (0.012 in) toward engine front (crankshaft pulley side)
Within 0.5 mm (0.020 in) toward engine rear (crankshaft sprocket side)
OIL SEAL
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1.
Remove transaxle assembly. Refer to
(6MT models).
2.
Remove clutch cover and clutch disk (6MT models). Refer to
CL-19, "MR20DD : Exploded View"
3.
Remove drive plate (CVT models) or flywheel (6MT models). Refer to
(CVT
models) or
(6MT models).
4.
Remove rear oil seal with a suitable tool.
CAUTION:
Never damage crankshaft and cylinder block.
INSTALLATION
1.
Apply the liquid gasket lightly to entire outside area of new rear oil seal.
Use Genuine Liquid Gasket or equivalent.
2.
Install rear oil seal so that each seal lip is oriented as shown in
the figure.
• Press-fit rear oil seal with a suitable drift (A) outer diameter
115 mm (4.53 in) and inner diameter 90 mm (3.54 in).
CAUTION:
• Never damage crankshaft and cylinder block.
• Press-fit oil seal straight to avoid causing burrs or tilt-
ing.
• Never touch grease applied onto oil seal lip.
• Press in rear oil seal
to the position as shown in the figure.
3.
Install in the reverse order of removal, for the rest of parts.
: Dust seal lip
: Oil seal lip
: Engine outside
: Engine inside
PBIC3485J
JPBIA4414ZZ
: Rear end surface of cylinder block
PBIC3952E
EM-208
< UNIT DISASSEMBLY AND ASSEMBLY >
[MR20DD]
CYLINDER HEAD
CYLINDER HEAD
Exploded View
INFOID:0000000010715508
REMOVAL
DISASSEMBLY
Cylinder head assembly
Cylinder head bolt
Cylinder head gasket
Comply with the installation procedure
when tightening. Refer to
: Always replace after every disassembly.
: N·m (kg-m, ft-lb)
: Should be lubricated with oil.
JPBIA4316ZZ
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