Nissan Juke F15. Manual — part 657
EM-182
< BASIC INSPECTION >
[MR EXCEPT FOR NISMO RS MODELS]
COMPRESSION PRESSURE
COMPRESSION PRESSURE
Inspection
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1. Warm up engine thoroughly. Then, stop it.
2. Release 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 (B) with an adapter (A) (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, and 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
PBIC3541J
a
: 20 mm (0.79 in)
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Compression pressure : Refer to
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING
EM-183
< SYMPTOM DIAGNOSIS >
[MR EXCEPT FOR NISMO RS MODELS]
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SYMPTOM DIAGNOSIS
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING
Diagnosis Chart By Symptom
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1. Narrow down the locations where noise is occurring.
2. Narrow down the types of noise.
JPBIA7071GB
EM-184
< SYMPTOM DIAGNOSIS >
[MR EXCEPT FOR NISMO RS MODELS]
NOISE, VIBRATION AND HARSHNESS (NVH) TROUBLESHOOTING
3. Narrow down the presumed causes from the relationship between the engine operating conditions when
the noise occurs and the symptoms.
4. Inspect the part that is presumed to be the source of the noise.
If necessary, repair or replace the specific part.
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 BELT
EM-185
< PERIODIC MAINTENANCE >
[MR EXCEPT FOR NISMO RS MODELS]
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PERIODIC MAINTENANCE
DRIVE BELT
Exploded View
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Removal and Installation
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REMOVAL
1. Fully turn the steering wheel to the right.
2. Disconnect the front side of the front fender protector (RH), and peel back the protector to create work
space. Refer to
.
3. Securely hold the hexagonal part (A) of the drive belt auto ten-
sioner (1) with a box wrench, and move it to the direction shown
by the arrow (loosening direction of tensioner) in the figure.
CAUTION:
Never put hand in a dangerous position where it could be
pinched, taking into consideration the possibility that the
fixing tool may become disconnected.
4. Insert a rod approximately 6 mm (0.24 in) in diameter such as
short-length screwdriver into the hole (B) of the retaining boss to
fix drive belt auto-tensioner.
• Keep drive belt auto-tensioner pulley arm locked after drive
belt is removed.
5. Remove drive belt.
INSTALLATION
1. Set the drive belt onto all the pulleys.
CAUTION:
• Never put hand in a dangerous position where it could be pinched, taking into consideration the
possibility that the fixing tool may become disconnected.
• Check that the drive belt path is normal. Refer to
• Check that the drive belt is securely inside the groove on each pulley.
• Check for engine oil, engine coolant, or other oil or grease on the drive belt and surrounding
locations.
2. Release drive belt auto-tensioner, and apply tension to drive belt.
3. Turn crankshaft pulley clockwise several times to equalize tension between each pulley.
4. Confirm tension of drive belt at indicator (notch on fixed side) is within the possible use range. Refer to
.
1.
Alternator
2.
Drive belt auto tensioner
3.
Crankshaft pulley
4.
A/C compressor
5.
Water pump
6.
Drive belt
A. Possible use range
B. Range when new drive belt is in-
stalled
C. Indicator
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