Nissan Juke Service and Repair Manual : Compression pressure
Inspection
1. Warm up engine thoroughly. Then, stop it.
2. Release fuel pressure. Refer to EC-551, "Work Procedure".
3. Remove ignition coil and spark plug from each cylinder. Refer to EM-53, "Exploded View".
4. Connect engine tachometer (not required in use of CONSULT-III).
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.
a : 20 mm (0.79 in)
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.
Compression pressure : Refer to EM-129, "General Specification".
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 piston rings and replace if necessary.
- If the compression pressure remains at low level despite the addition of engine oil, valves may be malfunctioning.
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 cylinder 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 EC-147, "Description".
Camshaft valve clearance
Inspection and Adjustment
INSPECTION
Perform inspection as follows after removal, installation or replacement of
camshaft or valve-related parts, or if
there is unusual engine conditions regardin ...
Symptom diagnosis
NOISE, VIBRATION AND HARSHNESS
(NVH) TROUBLESHOOTING
NVH troubleshooting Chart
1. Locate the area where noise occurs.
2. Confirm the type of noise.
3. Specify the operating condition of engine
...
Other materials:
Back door opener system
System Diagram
System Descr
BACK DOOR OPENER OPERATION
When back door opener switch is pressed, BCM operates back door opener
actuator.
NOTE:
Back door opener actuator is not for locking the back door. The function is only
to open the back door.
OPERATION CONDITION
If the following ...
Loss of power
Description
CHART 12: LOSS OF POWER
Diagnosis Procedure
1.CHECK FUEL
Check that the fuel reservoir is correctly filled and with the right fuel.
>> GO TO 2.
2.CHECK FUEL FILTER
Check the correctness of the fuel filter.
Is the fuel filter correct?
Yes >> GO TO 3.
No >& ...
4WD warning lamp
Component Function Check
1.CHECK 4WD WARNING LAMP FUNCTION
1. Turn the ignition switch ON.
2. Check that 4WD warning lamp turns on.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Proceed to diagnosis procedure. Refer to DLN-80, "Diagnosis Procedure".
Diag ...
