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-178, "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-250, "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. Refer to PG-111, "How to Handle Battery".
• 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-558, "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:
Camshaft valve clearance
Valve Clearance
CHECKING AND ADJUSTING THE VALVE CLEARANCE
1. Install the tappet.
2. Install the camshaft.
3. Install the camshaft brackets.
: 11 N·m (1.1 kg-m, 8 ft-lb)
4. Place the valves of the cylinder concerned at the “end of
exhaust - beginning of inlet” position and check the clearance ...
Intelligent key warning buzzer
Component Function Check
1.CHECK FUNCTION
1. Select “INTELLIGENT KEY” of “BCM” using CONSULT-III.
2. Select “OUTSIDE BUZZER” in “ACTIVE TEST” mode.
3. Check that the function operates normally according to the following
conditions.
Is the inspection result normal?
YES >> Intelligent ...
P1723 speed sensor
Description
The secondary speed sensor detects the revolution of parking gear and
generates a pulse signal. The pulse
signal is sent to the TCM, which converts it into vehicle speed.
The prymary speed sensor detects the primary pulley revolution speed and sends a
signal to the TCM.
DTC Log ...
