Nissan Frontier D40. Instruction — part 617
EM-200
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CYLINDER HEAD
6.
Remove cylinder head bolts in reverse order as shown using
suitable tool and power tool to remove cylinder heads (right and
left banks).
7.
Remove cylinder head gaskets.
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 the bolt 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 checked. Refer to
1.
Using suitable tool, wipe off oil, scale, gasket, sealant and carbon deposits from surface of cylinder head.
CAUTION:
Do not allow gasket fragments to enter engine oil or engine coolant passages.
2.
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.
INSTALLATION
PBIC2057E
Limit [(d1) - (d2)]
: 0.11 mm (0.0043 in)
PBIC2480E
Limit
: 0.1 mm (0.004 in)
SEM861E
CYLINDER HEAD
EM-201
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1.
Install new cylinder head gasket.
2.
Turn crankshaft until No. 1 piston is set at TDC.
• Crankshaft key should line up with the right bank cylinder cen-
ter line as shown.
3.
Install cylinder head follow the steps below to tighten cylinder
head bolts in numerical order as shown.
CAUTION:
If cylinder head bolts re-used, check their outer diameters
before installation. Refer to
EM-199, "Removal and Installa-
(Cylinder Head Bolts Outer Diameter).
Measure the tightening angle using Tool.
SEM532G
Step a
: 98 N·m (10 kg-m, 72 ft-lb)
Step b
: Loosen to 0 N·m in the reverse order of tight-
ening.
Step c
: 39.2 N·m (4.0 kg-m, 29 ft-lb)
PBIC2057E
Tool number
: KV10112100 (BT-8653-A)
Step d
: 90
°
clockwise
Step e
: 90
°
clockwise
WBIA0581E
EM-202
< ON-VEHICLE REPAIR >
[VQ40DE]
CYLINDER HEAD
4.
After installing cylinder head, measure distance between front
end faces of cylinder block and cylinder head (left and right
banks).
• If the measured value is out of the standard, re-install cylinder
head.
5.
Installation of the remaining parts is in the reverse order of removal.
INSPECTION AFTER INSTALLATION
• Before starting the engine, check oil/fluid levels including engine coolant and engine oil. If the levels are
lower than required quantity, fill to the specified level. Refer to
MA-16, "For North America: Fluids and Lubri-
• Use procedure below to check for fuel leakage.
• Turn ignition switch ON (with engine stopped). With fuel pressure applied to the fuel piping, check for fuel
leakage at the 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.
NOTE:
If hydraulic pressure inside timing chain tensioner drops after removal and installation, slack in the guide
may generate a pounding noise during and just after engine start. However, this is normal. Noise will stop
after hydraulic pressure rises.
• Warm up engine thoroughly to make sure there is no leakage of fuel, exhaust gas, or any oil/fluids including
engine oil and engine coolant.
• Bleed air from passages in lines and hoses, such as in cooling system.
• After cooling down the engine, again check oil/fluid levels including engine oil and engine coolant. Refill to
specified level if necessary.
• Summary of the inspection items:
* Transmission/transaxle/CVT fluid, power steering fluid, brake fluid, etc.
Standard
: 14.1 - 14.9 mm (0.555 - 0.587 in)
EMQ0662D
Item
Before starting engine
Engine running
After engine stopped
Engine coolant
Level
Leakage
Level
Engine oil
Level
Leakage
Level
Other oils and fluids*
Level
Leakage
Level
Fuel
Leakage
Leakage
Leakage
Exhaust gas
—
Leakage
—
CYLINDER HEAD
EM-203
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Exploded View
INFOID:0000000005274353
Disassembly and Assembly
INFOID:0000000005274354
DISASSEMBLY
1.
Remove spark plug.
2.
Remove valve lifter.
• Identify installation positions, and store them without mixing them up.
3.
Remove valve collet.
• Compress valve spring and remove valve collet with magnet
hand using Tool.
CAUTION:
When working, take care not to damage valve lifter holes.
4.
Remove valve spring retainer, valve spring and valve spring seat.
5.
Push valve stem to combustion chamber side, and remove valve.
• Identify installation positions, and store them without mixing them up.
1.
Valve lifter
2.
Valve collet
3.
Valve spring retainer
4.
Valve spring
5.
Valve oil seal
6.
Valve spring seat
7.
Valve guide
8.
Spark plug
9.
Spark plug tube
10. Cylinder head (right bank)
11.
Valve seat
12. Valve (EXH)
13. Valve (INT)
14. Cylinder head (left bank)
PBIC2637E
Tool numbers
: KV10109220 (
—
)
: KV10116200 (J-26336-B)
: KV10115900 (J-26336-20)
WBIA0578E
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