engine INFINITI QX56 2011 Factory Service Manual
[x] Cancel search | Manufacturer: INFINITI, Model Year: 2011, Model line: QX56, Model: INFINITI QX56 2011Pages: 5598, PDF Size: 94.53 MB
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ENGINE UNITEM-105
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ENGINE UNIT
DisassemblyINFOID:0000000006289580
1. Remove intake manifold. Refer to
EM-30, "Exploded View".
2. Remove exhaust manifold. Refer to EM-40, "
Exploded View".
3. Remove oil pan (lower). Refer to EM-54, "
Exploded View".
4. Remove ignition coil and spark plug. Refer to EM-23, "
Exploded View".
5. Remove rocker cover. Refer to EM-33, "
Exploded View".
6. Remove timing chain. Refer to EM-61, "
Exploded View".
7. Remove exhaust camshaft and VVEL ladder assembly. Refer to EM-74, "
Exploded View".
8. Remove cylinder head. Refer to EM-86, "
Exploded View".
AssemblyINFOID:0000000006289581
Assemble in the reverse order of disassembly.
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a. Loosen side bolts starting from No. 30 to 21 to remove.
b. Loosen main bearing cap sub bolts starting from No. 20 to 11 to
remove.
c. Loosen main bearing cap bolts starting from No. 10 to 1 to remove.
d. Remove the main bearing cap. Insert bolts (1) into bolt holes, and then remove main bearing
cap (2) by lifting up and shaking forward and backward.
CAUTION:
Be careful not to damage the mounting surface.
11. Remove crankshaft.
12. Remove main bearings and thrust bearings from main bearing cap and cylinder block. CAUTION:
Be careful not to drop main bear ing, and to scratch the surface.
Identify installation positions, and store them without mixing them up.
13. Remove pilot converter using the pilot bushing puller (commercial service tool), if necessary.
14. Remove oil jet.
ASSEMBLY
1. Fully air-blow engine coolant and engine oil passages in cylinder block, cylinder bore and crankcase to remove any foreign material.
CAUTION:
Use goggles to protect your eyes.
: Engine front
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2. Install each plug to cylinder block as shown in the figure. Tighten each plug as specified below.
Replace washers (1), (5) with new ones.
Apply sealant to the thread of water drain plug (3).Use Genuine RTV silicone seal ant or equivalent. Refer to
GI-22, "
Recommended Chemical Pr oducts and Sealants".
Apply sealant to the thread of plug (4). Use high strength thread lo cking sealant or equivalent.
Refer to GI-22, "
Recommended Chemical Products and
Sealants".
3. Install pilot converter to crankshaft, if removed. With drift [outer diameter: appr ox. 35 mm (1.38 in)], press-fit
as far as it will go.
Press-fit pilot converter with its chamfering side facing crank- shaft as shown in the figure.
4. Install main bearings and thrust bearings as per the following: CAUTION:
Be careful not to drop main b earing, and to scratch the surface.
a. Remove dust, dirt, and engine oil on bearing mating surfaces of cylinder block and main bearing caps.
: Engine front
Refer to GI-4, "
Components" for symbols in the figure.
Part Tightening torque
Plug (2) 78.0 N·m (8.0 kg-m, 58 ft-lb)
Water drain plug (3) 19.6 N·m (2.0 kg-m, 14 ft-lb) Plug (4) 53.9 N·m (5.5 kg-m, 40 ft-lb)
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EMP0569D
: Crankshaft side
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b. Install thrust bearings (2) to both sides of the No. 3 journal hous-
ing on cylinder block (1).
Install thrust bearings with the oil groove (A) facing crankshaftarm (outside).
c. Install main bearings paying attention to the direction. Main bearing with oil hole (B) and groove (C) goes on cylinderblock. The one without them goes on main bearing cap.
Before installing main bearings, apply engine oil to the bearing surface (inside). Do not apply engine oil to the back surface,
but thoroughly clean it.
When installing, align main bearing stopper protrusion to cut-
out of cylinder block and main bearing.
Ensure the oil holes on cylinder block and those on the corre-
sponding bearing are aligned.
5. Install crankshaft to cylinder block. While turning crankshaft by hand, check that it turns smoothly.
6. Install main bearing caps as per the following: Align the identification number to the journal position to install.
Install it with the front mark (indicated by stamping) facing thefront of engine.
Using plastic hammer or similar tool, tap them lightly to seat them on the installation position.
NOTE:
Main bearing cap cannot be replaced as a single parts,
because it is machined together with cylinder block.
7. Install each main bearing cap bolts as per the following: CAUTION:
If main bearing cap bolts and sub bolts are re-u sed, check their outer diameters before installa-
tion. Refer to EM-115, "
Inspection".
a. Apply new engine oil to threads and seat surfaces of main bearing cap bolts and sub bolts.
b. Tighten all bolts in order of (No. 1 - 30) temporarily.
c. Tighten main bearing cap bolts (M12) in order of No. 1 - 10.
d. Tighten main bearing cap sub bolts (M9) in order of No. 11 - 20.
3 : Main bearing (uppe r) (cylinder block side)
4 : Crankshaft
5 : Main bearing (lower) (main bearing cap side)
: Engine front
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: Engine front
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: Engine front
: 39.2 N·m (4.0 kg-m, 29 ft-lb)
: 29.4 N·m (3.0 kg-m, 22 ft-lb)
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![INFINITI QX56 2011 Factory Service Manual
EM-112
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e. Tighten main bearing cap bolts (M12) in order of No. 1 - 10(clockwise).
CAUTION:
Use the angle wrench [SST: KV10112100 (BT8653-A)] (A) to
ch](/img/42/57033/w960_57033-2673.png "INFINITI QX56 2011 Factory Service Manual
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e. Tighten main bearing cap bolts (M12) in order of No. 1 - 10(clockwise).
CAUTION:
Use the angle wrench [SST: KV10112100 (BT8653-A)] (A) to
ch")
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e. Tighten main bearing cap bolts (M12) in order of No. 1 - 10(clockwise).
CAUTION:
Use the angle wrench [SST: KV10112100 (BT8653-A)] (A) to
check tightening angl e. Never make judgment by visual
inspection.
f. Tighten main bearing cap sub bolts (M9) in order of No. 11 - 20. (clockwise)
g. Tighten side bolts (M10) in order of No. 21 - 30. After installing bolts, check that crankshaft can be rotated smoothly by hand.
Check the crankshaft end play. Refer to EM-137, "
CylinderBlock".
8. Install rear oil seal retainer. Apply a continuous bead of liquid gasket with tube presser
(commercial service tool) to rear oil seal retainer as shown in
the figure.
Use Genuine RTV silicone seal ant or equivalent. Refer to
GI-22, "
Recommended Chemical Products and Sealants".
9. Install rear oil seal on rear oil seal retainer.
Apply new engine oil to both oil seal lip (A) and dust seal lip(B).
Install it so that each seal lip is oriented as shown in the figure. CAUTION:
Be careful not to scratch or make burrs on circumference
of oil seal.
Press in rear oil seal (1) to the position as shown in the figure.
Using a suitable drift [outer diameter: 101 mm (3.98 in)].
Check the garter spring is in position and seal lips are not inverted.
10. Install piston to connecting rod as per the following: Angle tightening: 40 degrees
Angle tightening: 30 degrees
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: 49.0 N·m (5.0 kg-m, 36 ft-lb)
A : Protrusion
b : 4.0 - 5.6 mm (0.157 - 0.220 in)
c:
φ3.4 - 4.4 mm (0.134 - 0.173 in)
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: Engine inside
: Engine outside
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B : Rear oil seal retainer rear end face
a : 0 - 0.5 mm (0 - 0.020 in)
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Assemble so that the front mark (A) on the piston head and
the cylinder number (D) on connecting rod are positioned as
shown in the figure.
a. Using snap ring pliers, install new snap ring to the groove of pis- ton rear side.
Insert it fully into groove to install.
b. Install piston to connecting rod. Using an industrial use dryer or similar tool, heat piston until piston pin can be pushed in by hand without
excess force [approximately 60 to 70 °C (140 to 158 °F)]. From the front to the rear, insert piston pin into
piston and connecting rod.
c. Install new snap ring to the groove of the piston front side. Insert it fully into groove to install.
After installing, check that connecting rod moves smoothly.
11. Using a piston ring expander (c ommercial service tool) (A),
install piston rings.
CAUTION:
When installing piston rings, be careful not to damage piston.
Be careful not to damage piston rings by expending them excessively.
If there is stamped mark on ri ng, mount it with marked side up.
Position each ring with the gap as shown in the figure referring to the piston front mark (D).
Check the piston ring side clearance. Refer to EM-115, "
Inspection".
12. Install connecting rod bearings to connecting rod and connecting rod bearing cap. CAUTION:
Be careful not to drop connecting r od bearing, and to scratch the surface.
B : Oil hole
C : Front mark
: Engine front
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Stamped mark: To p r i n g ( A ) : 1 K
Second ring (B) : 2 K
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C : Top ring gap
E : Oil ring upper or lower rail gap (either of them)
F : Second ring and oil ring spacer gap
a : 90 degrees
b : 45 degrees
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Before installing connecting rod bearings, apply engine oil to the bearing surface (inside). Do not applyengine oil to the back surface, but thoroughly clean it.
When installing, align connecting rod bearing stopper protru-
sion (B) with cutout (A) of connecting rods and connecting rod
bearing caps to install.
Ensure the oil hole (C) on connecting rod and that on the cor-
responding bearing are aligned.
13. Install piston and connecting rod assembly to crankshaft. Position crankshaft pin corresponding to connecting rod to be installed onto the bottom dead center.
Apply engine oil sufficiently to the cylinder bore, piston and crankshaft pin journal.
Match the cylinder position with the cyli nder number on connecting rod to install.
Be sure that front mark on piston cr own is facing the front of the engine.
Using a piston ring compressor [SST: EM03470000 (J-8037)]
(A) or suitable tool, install piston with the front mark on the pis-
ton crown facing the front of the engine.
CAUTION:
Be careful not to damage the cylinder wall and crankshaft
pin, resulting from an interf erence of the connecting rod big
end.
14. Install connecting rod bearing cap. Match the stamped cylinder number marks on connecting rodwith those on connecting rod bearing cap to install.
Be sure that front mark (H) on connecting rod bearing cap is facing the front of the engine.
15. Tighten connecting rod bolts as per the following:
a. Inspect the outer diameter of connecting rod bolt. Refer to EM-115, "
Inspection".
b. Apply engine oil to the threads and seats of connecting rod bolts.
c. Tighten connecting rod bolts.
d. Completely loosen connecting rod bolts.
e. Tighten connecting rod bolts.
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PBIC3244J
A: Sample codes
B : Bearing stopper groove
C : Small-end diameter grade
D : Big-end diameter grade
E : Weight grade
F : Cylinder No.
G : Management code
: 29.4 N·m (3.0 kg-m, 21.7 ft-lb)
: 0 N·m (0 kg-m, 0 ft-lb)
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![INFINITI QX56 2011 Factory Service Manual
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f. Tighten connecting rod bolts. (clockwise)
CAUTION:
Always use the angle wrench [SST: KV10112100 (B T8653-A)].](/img/42/57033/w960_57033-2676.png "INFINITI QX56 2011 Factory Service Manual
CYLINDER BLOCKEM-115
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f. Tighten connecting rod bolts. (clockwise)
CAUTION:
Always use the angle wrench [SST: KV10112100 (B T8653-A)].")
CYLINDER BLOCKEM-115
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f. Tighten connecting rod bolts. (clockwise)
CAUTION:
Always use the angle wrench [SST: KV10112100 (B T8653-A)]. Never make judgment by visual
inspection.
After tightening connecting rod bolts, c heck that crankshaft rotates smoothly.
Check the connecting rod side clearance. Refer to EM-115, "
Inspection".
16. Install knock sensors (1). Install knock sensors in the direction shown in the figure.
After installing knock sens or, connect harness connector, and
lay it out to front of the engine.
CAUTION:
Never tighten mounting bolts while holding connector.
If any impact by dropping is applied to knock sensor,
replace it with new one.
NOTE:
Check that there is no foreign material on the cylinder block
mating surface and the back surface of knock sensor.
Check that knock sensor does not interfere with other parts.
17. Install oil filter (for VVEL ladder assembly).
18. Install drive plate. Install drive plate (4) and reinforcement plate (3) as shown inthe figure.
When installing drive plate to crankshaft (1), be sure to cor- rectly align crankshaft side dowel pin and drive plate side
dowel pin hole.
CAUTION:
If these are not aligned correct ly, engine runs roughly and
“MIL” illuminates.
Holding ring gear with the ring gear stopper [SST: KV10119200 (J-49277)].
Tighten the mounting bolts crosswise over several times.
19. Assemble in the reverse order of disassembly.
InspectionINFOID:0000000006289584
CRANKSHAFT END PLAY
Measure the clearance between thrust bearings and crankshaft arm when crankshaft is moved fully forward or backward with a dial
indicator (A).
If the measured value exceeds t he limit, replace thrust bearings,
and measure again. If it still exceeds the limit, replace crankshaft
also. : 19.6 N·m (2.0 kg-m, 14.5 ft-lb)
Angle tightening: 90 degrees
: Engine front
2 : Pilot converter
A : Rounded : Engine front
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Standard and limit : Refer to EM-137, "CylinderBlock".
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Measure the side clearance of piston ring (1) and piston ring
groove with a feeler gauge (C).
If the measured value exceeds t he limit, replace piston ring, and
measure again. If it still exceeds the limit, replace piston also.
PISTON RING END GAP
Check that the cylinder bore inner diameter is within the specifica- tion.
Lubricate with new engine oil to piston (1) and piston ring (2), and
then insert piston ring until middle of cylinder with piston, and mea-
sure the piston ring end gap with a feeler gauge (B).
If the measured value exceeds t he limit, replace piston ring, and
measure again. If it still exceeds the limit, re-bore cylinder and use
oversize piston and piston rings.
CONNECTING ROD BEND AND TORSION
Check with a connecting rod aligner.
If it exceeds the limit, replace connecting rod assembly.
CONNECTING ROD BIG END DIAMETER
A: OK
B: NG
Standard and limit : Refer to EM-137, "CylinderBlock".
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A : Press-fit
Standard and limit : Refer to EM-137, "CylinderBlock".
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A: Bend
B: Torsion
C : Feeler gauge
Bend limit
: Refer to EM-137,
"CylinderBlock".
Torsion limit
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Install connecting rod bearing cap without installing connecting rodbearing, and tighten connecting rod bolts to the specified torque.
Refer to EM-107, "
Disassembly and Assembly" for the tightening
procedure.
Measure the inner diameter of connecting rod big end with an inside micrometer.
If out of the standard, replace connecting rod assembly.
CONNECTING ROD BUSHING OIL CLEARANCE
Connecting Rod Bushing Inner Diameter
Measure the inner diameter of connecting rod bushing with an inside
micrometer (A).
Piston Pin Outer Diameter
Measure the outer diameter of piston pin with a micrometer (A).
Connecting Rod Bushing Oil Clearance
(Connecting rod bushing oil clearance) = (Connecting rod bus hing inner diameter) – (Piston pin outer diame-
ter)
If the calculated value exceeds the limit, replac e connecting rod assembly and/or piston and piston pin
assembly.
If replacing piston and piston pin assembly, refer to EM-125, "
Description".
If replacing connecting rod assembly, refer to EM-126, "
ConnectingRodBearing" to select the connecting
rod bearing.
CYLINDER BLOCK DISTORTION
Using a scraper, remove gasket on the cylinder block su rface, and also remove engine oil, scale, carbon, or
other contamination.
CAUTION:
Be careful not to allow gasket flakes to en ter engine oil or engine coolant passages.
1 : Connecting rod
Standard : Refer to EM-137, "CylinderBlock".
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Standard : Refer to EM-137, "CylinderBlock".
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Standard : Refer to EM-137, "CylinderBlock".
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Standard and limit : Refer to EM-137, "CylinderBlock".
Revision: 2010 May2011 QX56