Qashqai J11. Engine mechanical (HRA2DDT, K9K, MR20DD) — part 9
PREPARATION
EM-129
< PREPARATION >
[MR20DD]
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PREPARATION
PREPARATION
Special Service Tools
INFOID:0000000010715449
Tool number
Tool name
Description
KV10111100
Seal cutter
Removing oil pan (upper and lower) etc.
KV10116200
Valve spring compressor
1. KV10115900
Attachment
2. KV10109220
Adapter
Disassembling and assembling valve mecha-
nism
Part
is a component of KV10116200, but
Part
is not so.
KV10112100
Angle wrench
Tightening bolts for main bearing cap, cylinder
head, etc.
KV10117100
Heated oxygen sensor wrench
Loosening or tightening heated oxygen sen-
sor 1
For 22 mm (0.87 in) width hexagon nut
KV10107902
Valve oil seal puller
KV10116100
Valve oil seal puller adapter
Removing valve oil seal
KV10115600
Valve oil seal drift
Installing valve oil seal
Use side A.
a: 20 (0.79) dia. d: 8 (0.31) dia.
b: 13 (0.51) dia. e: 10.7 (0.421)
c: 10.3 (0.406) dia. f: 5 (0.20)
Unit: mm (in)
S-NT046
PBIC1650E
S-NT014
NT379
S-NT605
S-NT603
EM-130
< PREPARATION >
[MR20DD]
PREPARATION
Commercial Service Tools
INFOID:0000000010715450
EM03470000
Piston ring compressor
Installing piston assembly into cylinder bore
KV11103000
Pulley puller
Removing crankshaft pulley
KV11105210
Stopper plate
Fixing drive plate and flywheel
Tool number
Tool name
Description
S-NT044
NT676
ZZA0009D
Tool name
Description
Pilot bushing puller
Removing pilot converter
Spark plug wrench
Removing and installing spark plug
: 14 mm (0.55 in)
Pulley holder
Crankshaft pulley removing and installing
S-NT045
JPBIA0399ZZ
ZZA1010D
PREPARATION
EM-131
< PREPARATION >
[MR20DD]
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Valve seat cutter set
Finishing valve seat dimensions
Piston ring expander
Removing and installing piston ring
Valve guide drift
Removing and installing valve guide
Valve guide reamer
Reaming valve guide inner hole
Reaming hole for oversize valve guide
Oxygen sensor thread cleaner
Reconditioning the exhaust system threads
before installing a new heated oxygen sensor
(Use with anti-seize lubricant shown below.)
a: 18 mm (0.71 in) dia. for zirconia heated
oxygen sensor
b: 12 mm (0.47 in) dia. for titania heated ox-
ygen sensor
Anti-seize lubricant (Permatex 133AR
or equivalent meeting MIL specifica-
tion MIL-A-907)
Lubricating oxygen sensor thread cleaning
tool when reconditioning exhaust system
threads
Tool name
Description
S-NT048
S-NT030
PBIC4012E
PBIC4013E
AEM488
AEM489
EM-132
< PREPARATION >
[MR20DD]
PREPARATION
Lubricant or/and Sealant
INFOID:0000000010715451
Manual lift table caddy
Removing and installing engine
Tube presser
Pressing the tube of liquid gasket
Tool name
Description
ZZA1210D
S-NT052
Name
Description
Note
Three bond 1215
Cylinder block
Water drain plug
Three bond 1217H
• Oil pan (lower)
• Rocker cover
• Timing chain
• Oil pan (upper)
• Camshaft
• Cylinder block
—
Three bond 1386B
Cylinder block
Plug
CAMSHAFT VALVE CLEARANCE
EM-133
< BASIC INSPECTION >
[MR20DD]
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BASIC INSPECTION
CAMSHAFT VALVE CLEARANCE
Inspection and Adjustment
INFOID:0000000010715452
INSPECTION
Perform inspection as follows after removal, installation or replacement of camshaft or valve-related parts, or if
there is unusual engine conditions regarding valve clearance.
1.
Remove rocker cover. Refer to
2.
Measure the valve clearance with the following procedure:
a.
Set No. 1 cylinder at TDC of its compression stroke.
• Rotate crankshaft pulley
clockwise and align TDC mark (no
paint)
to timing indicator
on front cover.
• At the same time, check that both intake and exhaust cam
noses of No. 1 cylinder face inside (
) as shown in the figure.
• If they do not face inside, rotate crankshaft pulley once more
(360 degrees) and align as shown in the figure.
b.
Using a feeler gauge, measure the clearance between valve
lifter and camshaft.
: White paint mark (Not use for service)
PBIC3960E
: Camshaft (INT)
: Camshaft (EXH)
: Engine front
JPBIA4347ZZ
Valve clearance
: Refer to
.
PBIC3192J
EM-134
< BASIC INSPECTION >
[MR20DD]
CAMSHAFT VALVE CLEARANCE
• By referring to the figure, measure the valve clearances at
locations marked “
×
” as shown in the table below [locations
indicated with black arrow (
) in the figure] with a feeler
gauge.
c.
Set No. 4 cylinder at TDC of its compression stroke.
• Rotate crankshaft pulley
one revolution (360 degrees) and
align TDC mark (no paint)
to timing indicator
on front
cover.
• By referring to the figure, measure the valve clearance at loca-
tions marked “
×
” as shown in the table below [locations indi-
cated with black arrow (
) in the figure] with a feeler gauge.
3.
If out of standard, perform adjustment. Refer to “ADJUSTMENT”.
ADJUSTMENT
• Perform adjustment depending on selected head thickness of valve lifter.
1.
Remove camshaft. Refer to
2.
Remove valve lifters at the locations that are out of the standard.
: Exhaust side
: No. 1 cylinder
: No. 2 cylinder
: No. 3 cylinder
: No. 4 cylinder
: Intake side
: Engine front
JPBIA5120ZZ
Measuring position
No. 1 CYL.
No. 2 CYL.
No. 3 CYL.
No. 4 CYL.
No. 1 cylinder at compression TDC
EXH
×
×
INT
×
×
: White paint mark (Not use for service)
PBIC3960E
: Exhaust side
: No. 1 cylinder
: No. 2 cylinder
: No. 3 cylinder
: No. 4 cylinder
: Intake side
: Engine front
JPBIA5121ZZ
Measuring position
No. 1 CYL.
No. 2 CYL.
No. 3 CYL.
No. 4 CYL.
No. 4 cylinder at compression TDC
EXH
×
×
INT
×
×
CAMSHAFT VALVE CLEARANCE
EM-135
< BASIC INSPECTION >
[MR20DD]
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3.
Measure the center thickness of the removed valve lifters with a
micrometer (A).
4.
Use the equation below to calculate valve lifter thickness for replacement.
• Thickness of new valve lifter
can be identified by stamp
mark
on the reverse side (inside the cylinder).
• Stamp mark “302H” indicates 3.02 mm (0.1189 in) in thick-
ness.
NOTE:
Available thickness of valve lifter: 26 sizes range 3.00 to 3.50 mm (0.1181 to 0.1378 in) in steps of 0.02
mm (0.0008 in) (when manufactured at factory). Refer to
5.
Install the selected valve lifter.
6.
Install camshaft. Refer to
7.
Install timing chain and related parts. Refer to
8.
Manually rotate crankshaft pulley a few rotations.
9.
Check that the valve clearances is within the standard. Refer to “INSPECTION”.
10. Install remaining parts in the reverse order of removal.
11. Warm up the engine, and check for unusual noise and vibration.
JPBIA0169ZZ
Valve lifter thickness calculation:
t = t
1
+ (C
1
– C
2
)
t
= Valve lifter thickness to be replaced
t
1
= Removed valve lifter thickness
C
1
= Measured valve clearance
C
2
= Standard valve clearance:
Intake
: 0.28 mm (0.011 in)
Exhaust
: 0.30 mm (0.012 in)
PBIC3196J
EM-136
< BASIC INSPECTION >
[MR20DD]
COMPRESSION PRESSURE
COMPRESSION PRESSURE
Inspection
INFOID:0000000010715453
1.
Warm up engine thoroughly. Then, stop it.
2.
Release the fuel pressure. Refer to
.
3.
Remove ignition coil and spark plug from each cylinder. Refer to
4.
Connect engine tachometer (not required in use of CONSULT).
5.
Install compression gauge (A) with an adapter (B) (commercial
service tool) onto spark plug hole.
• Use the adapter whose picking up end inserted to spark plug
hole is smaller than 20 mm (0.79 in) in diameter. Otherwise, it
may be caught by cylinder head during removal.
6.
With accelerator pedal fully depressed, turn ignition switch to “START” for cranking. When the gauge
pointer stabilizes, read the compression pressure and the engine rpm. Perform these steps to check each
cylinder.
CAUTION:
Always use a fully charged battery to obtain the specified engine speed.
• If the engine speed is out of the specified range, check battery liquid for proper gravity. Check the
engine speed again with normal battery gravity.
• If compression pressure is below minimum value, check valve clearances, and parts associated with
combustion chamber (valve, valve seat, piston, piston ring, cylinder bore, cylinder head, cylinder head
gasket). After the checking, measure compression pressure again.
• If some cylinder has low compression pressure, pour small amount of engine oil into the spark plug hole
of the cylinder to recheck it for compression.
- If the added engine oil improves the compression, piston rings may be worn out or damaged. Check pis-
ton rings and replace if necessary.
- If the compression pressure remains at low level despite the addition of engine oil, valves may be mal-
functioning. Check valves for damage. Replace valve or valve seat accordingly.
• If two adjacent cylinders have respectively low compression pressure and their compression remains
low even after the addition of engine oil, cylinder head gaskets are leaking. In such a case, replace cyl-
inder head gaskets.
7.
After inspection is completed, install removed parts.
8.
Start the engine, and check that the engine runs smoothly.
9.
Perform trouble diagnosis. If DTC appears, erase it. Refer to
.
JPBIA6826ZZ
: 20 mm (0.79 in)
JPBIA0171ZZ
Compression pressure
: Refer to
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING
EM-137
< SYMPTOM DIAGNOSIS >
[MR20DD]
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SYMPTOM DIAGNOSIS
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING
NVH troubleshooting Chart
INFOID:0000000010715454
1.
Locate the area where noise occurs.
2.
Confirm the type of noise.
3.
Specify the operating condition of engine.
4.
Check specified noise source.
If necessary, repair or replace these parts.
JPBIA6913GB
EM-138
< SYMPTOM DIAGNOSIS >
[MR20DD]
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING
A: Closely related
B: Related
C: Sometimes related
—: Not related
Location
of noise
Type of
noise
Operating condition of engine
Source of
noise
Check item
Refer-
ence page
Before
warm-
up
After
warm-
up
When
start-
ing
When
idling
When
racing
While
driving
Top of en-
gine
Rocker
cover
Cylinder
head
Ticking or
clicking
C
A
—
A
B
—
Tappet
noise
Valve clearance
Rattle
C
A
—
A
B
C
Camshaft
bearing
noise
Camshaft journal oil
clearance
Camshaft runout
Crank-
shaft pul-
ley
Cylinder
block
(Side of
engine)
Oil pan
Slap or
knock
—
A
—
B
B
—
Piston pin
noise
Piston to piston pin oil
clearance
Connecting rod bushing
oil clearance
Slap or
rap
A
—
—
B
B
A
Piston
slap noise
Piston to cylinder bore
clearance
Piston ring side clear-
ance
Piston ring end gap
Connecting rod bend
and torsion
Knock
A
B
C
B
B
B
Connect-
ing rod
bearing
noise
Connecting rod bushing
oil clearance
Connecting rod bearing
oil clearance
Knock
A
B
—
A
B
C
Main bear-
ing noise
Main bearing oil clear-
ance
Crankshaft runout
Front of
engine
Front cov-
er
Tapping or
ticking
A
A
—
B
B
B
Timing
chain and
chain ten-
sioner
noise
Timing chain cracks
and wear
Timing chain tensioner
operation
Front of
engine
Squeak-
ing or fizz-
ing
A
B
—
B
—
C
Drive belt
(Sticking
or slip-
ping)
Drive belt deflection
Creaking
A
B
A
B
A
B
Drive belt
(Slipping)
Idler pulley bearing op-
eration
Squall
Creak
A
B
—
B
A
B
Water
pump
noise
Water pump operation
DRIVE BELTS
EM-139
< PERIODIC MAINTENANCE >
[MR20DD]
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PERIODIC MAINTENANCE
DRIVE BELTS
Exploded View
INFOID:0000000010715455
Removal and Installation
INFOID:0000000010715456
REMOVAL
1.
Remove front wheel and tire (RH). Refer to
(with TPMS) or
(without TPMS).
2.
Remove front fillet molding (RH). Refer to
.
3.
Remove front fender protector (RH). Refer to
4.
Hold the hexagonal part
of drive belt auto-tensioner
with a
wrench securely. Then move the wrench handle in the direction
of arrow (loosening direction of tensioner).
CAUTION:
Avoid placing hand in a location where pinching may occur
if the holding tool accidentally comes off.
5.
Insert a rod approximately 6 mm (0.24 in) in diameter such as
short-length screwdriver into the hole
of the retaining boss to
drive belt auto-tensioner.
• Keep drive belt auto-tensioner pulley arm locked after drive
belt is removed.
INSTALLATION
CAUTION:
• Confirm drive belt is completely set to pulleys.
• Check for engine oil, working fluid and engine coolant are not adhered to drive belt and each pulley
groove.
1.
Release drive belt auto-tensioner, and apply tension to drive belt.
2.
Turn crankshaft pulley clockwise several times to equalize tension between each pulley.
3.
Confirm tension of drive belt at indicator (notch on fixed side) is within the possible use range. Refer to
.
Alternator
Drive belt auto-tensioner
Crankshaft pulley
A/C compressor
Water pump
Drive belt
Possible use range
Range when new drive belt is in-
stalled
Indicator
JPBIA4302ZZ
JPBIA4351ZZ
EM-140
< PERIODIC MAINTENANCE >
[MR20DD]
DRIVE BELTS
Inspection
INFOID:0000000010715457
WARNING:
Perform this step when engine is stopped.
• Check that the indicator (notch on fixed side) of drive belt auto-tensioner is within the possible use range
in the figure.
NOTE:
• Check the drive belt auto-tensioner indication when the engine is cold.
• When new drive belt is installed, the indicator (notch on fixed side) should be within the range
in the fig-
ure.
• Visually check entire drive belts for wear, damage or cracks.
• If the indicator (notch on fixed side) is out of the possible use range or belts is damaged, replace belts.
Adjustment
INFOID:0000000010715458
Alternator
Drive belt auto-tensioner
Crankshaft pulley
A/C compressor
Water pump
Drive belt
Possible use range
Range when new drive belt is in-
stalled
Indicator
JPBIA4302ZZ
Refer to
AIR CLEANER FILTER
EM-141
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[MR20DD]
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AIR CLEANER FILTER
Exploded View
INFOID:0000000010715459
Removal and Installation
INFOID:0000000010715460
REMOVAL
1.
Release air resonator pawls and remove to upper direction.
Mounting rubber
Air duct assembly
Air cleaner filter unit assembly
Air cleaner filter unit bracket
Air resonator bracket
Air Resonator
Air duct inlet
Clip
Air duct assembly bracket 1
Air duct assembly bracket 2
: Always replace after every disassembly.
: N·m (kg-m, in-lb)
E1BIA1175GB
EM-142
< PERIODIC MAINTENANCE >
[MR20DD]
AIR CLEANER FILTER
2.
Remove the clips
of air cleaner cover
.
3.
Shifte air cleaner cover
to car front side and remove air
cleaner element
.
INSTALLATION
Install in the reverse order of removal.
• Insert the projection
of air cleaner element
in such a way so
that it becomes the position (upper front side of car) of illustration.
• Verify that there is no looseness in air cleaner cover and has been
fixed accurately.
• Check that pawls of air resonator are engaged.
Inspection (Dry Paper Type)
INFOID:0000000010715461
INSPECTION AFTER REMOVAL
Examine with eyes that there is no stain, clogging, or damage on air cleaner element.
• Remove dusts (such as dead leafs) on air cleaner element surface and inside cleaner case.
• To clean air cleaner element
, blow air on it from the air intake manifold side
to remove trash or dust.
CAUTION:
• When blowing air on the air cleaner element, attach the
cover to the air cleaner case and stay away from the vehicle
as much as possible to prevent the entry of dirt into the air
cleaner case.
• Never blow air from the ambient air side to prevent clogging.
When the ambient air side needs to be cleaned, attach the
cover to the intake manifold side and lightly dust by hand.
• If clogging or damage is observed, replace the air cleaner element.
: Vehicle front
JPBIA6829ZZ
: Projection
JPBIA6830ZZ
: Projection
JPBIA6830ZZ
Ambient air side
Air blow direction
JSBIA3460ZZ
AIR CLEANER FILTER
EM-143
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[MR20DD]
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MAINTENANCE INTERVAL
MA-22, "MR20DD : Periodic Maintenance"
.
Inspection (Viscous Paper Type)
INFOID:0000000010715462
INSPECTION AFTER REMOVAL
Examine with eyes that there is no stain, clogging, or damage on air cleaner element.
• Remove dusts (such as dead leafs) on air cleaner element surface and inside cleaner case.
• If clogging or damage is observed, replace the air cleaner element.
CAUTION:
Never clean the viscous paper type air cleaner element by blowing as there is a risk of deterioration of
its performance
MAINTENANCE INTERVAL
MA-22, "MR20DD : Periodic Maintenance"
.
EM-144
< PERIODIC MAINTENANCE >
[MR20DD]
SPARK PLUG
SPARK PLUG
Exploded View
INFOID:0000000010715463
Removal and Installation
INFOID:0000000010715464
REMOVAL
1.
Remove resonater of air duct assembly. Refer to
.
2.
Remove ignition coil. Refer to
Ignition coil
Spark plug
Rocker cover
Rocker cover gasket
Oil filler cap
PCV valve
O-ring
Comply with the installation proce-
dure when tightening. Refer to
: Always replace after every disassembly.
: N·m (kg-m, ft-lb)
: N·m (kg-m, in-lb)
JPBIA6815GB
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