Nissan Qashqai (2007-2010). Manual — part 78

EM-260

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DRIVE BELTS

4.

Remove drive belt.
• Turn clockwise adjusting bolt.

INSTALLATION

1.

Install the drive belt.

CAUTION:

• Make sure belt is correctly engaged with the pulley

groove.

• Check for oil and coolant on belt and each pulley groove.
• Certain drive belts have five teeth whereas the air condi-

tioning compressor pulley, power-assisted steering pump
pulley, and alternator pulley all have six teeth.In this case,
it is essential to check that inner tooth (O) of the pulleys
remains free when fitting the drive belt.
Never turn the engine in the opposite direction to its nor-
mal operating direction.
Use a brush to remove any deposits from the crankshaft
pulley V grooves.
For engines fitted with a mechanical tensioning roller, it is essential to replace the tensioning
roller mounting bolts.

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.

MBIB0353E

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AIR CLEANER FILTER

EM-261

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AIR CLEANER FILTER

Removal and Installation

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REMOVAL

1.

Open air cleaner case.

2.

Remove air cleaner filter (1).

INSTALLATION

Install in the reverse order of removal.

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EM-262

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CAMSHAFT VALVE CLEARANCE

CAMSHAFT VALVE CLEARANCE

Inspection and Adjustment

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INSPECTION

1.

Place the valves of the cylinder concerned at the “end of
exhaust - beginning of intake” position and inspect the clearance
(X).
NOTE:
Dimension (Y) corresponds to the tappet thickness sizes (there
are 25 sizes at the service parts).

2.

Compare the values recorded with the values specified, then
replace the tappets which are not within tolerance.

ADJUSTMENT

1.

The camshaft must be removed to replace the tappets.
Determining dimension (Y).

2.

Set up the following assembly using dial gauge stand
[KV113B0050 (Mot. 252-01) (commercial service tool) or equiva-
lent tool] and dial gauge, then calibrate the gauge.

3.

Raise the gauge extension (without modifying the position of the
magnetic support/gauge assembly), then slide in the tappet to
be measured.
Note dimension (Y) and repeat the operation for the tappets
where the valve clearance is not within tolerance.
Select the various thicknesses of the tappet(s). The service
parts supplies 25 sizes of single-piece tappets. Refer to

EM-329,

"Camshaft"

.

Clearance, when the engine is cold:

Refer to

EM-329, "Camshaft"

.

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COMPRESSION PRESSURE

EM-263

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COMPRESSION PRESSURE

Inspection

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1.

Warm up engine thoroughly. Then stop.

2.

Remove glow plug.

3.

Disconnect high-pressure supply pump harness connector to avoid fuel injection during measurement.

4.

Connect compression gauge attachment hose [SST:
KV113B0400 (Mot. 1592)] (A) to the hole for glow plug.

5.

Connect compression gauge (B) to attachment hose.

6.

Turn ignition switch to START for cranking and check compres-
sion gauge.

7.

Perform the same procedure for the other cylinders.
• 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 glow plug hole

of the cylinder to re-check 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 remain

slow even after the addition of engine oil, cylinder head gaskets are leaking. In such a case, replace cyl-
inder head gaskets.

8.

Disconnect compression gauge and attachment hose.

9.

After inspection is completed, install removed parts.

10. Start the engine, and make sure that the engine runs smoothly.

11. Perform trouble diagnosis. If DTC appears, erase it. Refer to

EC-1315, "Diagnosis Description"

.

Compression pressure

: Refer to

EM-329, "General Specification"

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