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Nissan Qashqai (2007-2010). Manual - part 33

EM-80

< ON-VEHICLE REPAIR >

[HR16DE]

CYLINDER HEAD

• Compress valve spring with the valve spring compressor, the

attachment and the adapter [SST: KV10116200] (A). Install
valve collet with a magnet hand (B).

CAUTION:

Be careful not to damage valve lifter holes.

• Tap valve stem edge lightly with a plastic hammer after instal-

lation to check its installed condition.

Install valve lifter.

10. Install spark plug with a spark plug wrench (commercial service tool).

Inspection

INFOID:0000000000943692

INSPECTION AFTER REMOVAL

Cylinder Head Bolts Outer Diameter

• Cylinder head bolts are tightened by plastic zone tightening

method. Whenever the size difference between “d1” and “d2”
exceeds the limit, replace them with a new one.

• If reduction of outer diameter appears in a position other than “d2”,

use it as “d2” point.

Cylinder Head Distortion

NOTE:
When performing this inspection, cylinder block distortion should be also checking. Refer to

EM-120, "Cylinder

Block"

Wipe off engine oil and remove water scale (like deposit), gasket, sealant, carbon, etc. with a scraper.

CAUTION:

Never allow gasket debris to enter passages for engine oil or engine coolant.

At each of several locations on bottom surface of cylinder head,
measure the distortion in six directions.

• If it exceeds the limit, replace cylinder head.

INSPECTION AFTER DISASSEMBLY

Valve Dimensions

• Check the dimensions of each valve. For the dimensions, refer to

EM-118, "Cylinder Head"

• If dimensions are out of the standard, replace valve and check valve seat contact. Refer to “VALVE SEAT

CONTACT”.

Valve Guide Clearance

Valve Stem Diameter

PBIC3727E

Limit (“d1”–“d2”): 0.15 mm (0.0059 in)

PBIC3717E

: Straightedge

: Feeler gauge

Limit

: Refer to

EM-118, "Cylinder Head"

PBIC3207J

CYLINDER HEAD

EM-81

< ON-VEHICLE REPAIR >

[HR16DE]

• Measure the diameter of valve stem with micrometer (A).

Valve Guide Inner Diameter

• Measure the inner diameter of valve guide with bore gauge.

Valve Guide Clearance

• (Valve guide clearance) = (Valve guide inner diameter) – (Valve

stem diameter)

• If the calculated value exceeds the limit, replace valve and/or valve guide. When valve guide must be

replaced, refer to “VALVE GUIDE REPLACEMENT”.

Valve Seat Contact

• After confirming that the dimensions of valve guides and valves are

within the specifications, perform this procedure.

• Apply prussian blue (or white lead) onto contacting surface of valve

seat to check the condition of the valve contact on the surface.

• Check if the contact area band is continuous all around the circum-

ference.

• If not, grind to adjust valve fitting and check again. If the contacting

surface still has “NG” conditions even after the re-check, replace
valve seat. Refer to

EM-76, "Disassembly and Assembly"

Valve Spring Squareness

• Set a try square (A) along the side of valve spring and rotate

spring. Measure the maximum clearance between the top of spring
and try square.

• If it exceeds the limit, replace valve spring.

Valve Spring Dimensions and Valve Spring Pressure Load

• Check the valve spring pressure at specified spring height.

• If the installation load or load with valve open is out of the stan-

dard, replace valve spring.

INSPECTION AFTER INSTALLATION

Inspection for Leaks

• Before starting engine, check oil/fluid levels including engine coolant and engine oil. If less than required

quantity, fill to the specified level. Refer to

MA-21, "Fluids and Lubricants"

Standard

: Refer to

EM-118, "Cylinder Head"

Standard

: Refer to

EM-118, "Cylinder Head"

Standard and Limit

: Refer to

EM-118, "Cylinder Head"

PBIC3213J

: OK

: NG

JPBIA0187ZZ

: Contact

Limit

: Refer to

EM-118, "Cylinder Head"

PBIC3219J

Standard

: Refer to

EM-118, "Cylinder Head"

SEM113

EM-82

< ON-VEHICLE REPAIR >

[HR16DE]

CYLINDER HEAD

• Use procedure below to check for fuel leakage.
- Turn ignition switch “ON” (with engine stopped). With fuel pressure applied to fuel piping, check for fuel leak-

age at connection points.

- Start engine. With engine speed increased, check again for fuel leakage at connection points.
• Run engine to check for unusual noise and vibration.
• Warm up engine thoroughly to make sure there is no leakage of fuel, exhaust gases, or any oil/fluids includ-

ing engine oil and engine coolant.

• Bleed air from lines and hoses of applicable lines, such as in cooling system.
• After cooling down engine, again check oil/fluid levels including engine oil and engine coolant. Refill to the

specified level, if necessary.

Summary of the inspection items:

*: Transmission/transaxle/CVT fluid, power steering fluid, brake fluid, etc.

Items

Before starting engine

Engine running

After engine stopped

Engine coolant

Level

Leakage

Level

Engine oil

Level

Leakage

Level

Other oils and fluid*

Level

Leakage

Level

Fuel

Leakage

Exhaust gases

—

Leakage

—

ENGINE ASSEMBLY

EM-83

< REMOVAL AND INSTALLATION >

[HR16DE]

REMOVAL AND INSTALLATION

ENGINE ASSEMBLY

Exploded View

INFOID:0000000000893871

Removal and Installation

INFOID:0000000000894026

WARNING:

• Situate the vehicle on a flat and solid surface.
• Place chocks at front and back of rear wheels.
• Attach proper slingers and bolts described in PARTS CATALOG if engine slingers are not equipped.

CAUTION:

• Always be careful to work safely, avoid forceful or uninstructed operations.
• Never start working until exhaust system and coolant are cool enough.
• If items or work required are not covered by the engine section, refer to the applicable sections.
• Always use the support point specified for lifting.

Engine mounting insulator (RH)

Engine mounting bracket (RH)

Engine mounting stay

Rear engine mounting bracket

Rear torque rod

Engine mounting bracket (LH)

Engine mounting insulator (LH)

Refer to

GI-4, "Components"

for symbols in the figure.

JPBIA0279GB

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