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EM-42Revision: October 2005
TIMING CHAIN
2005 QX56
b. Install the bolts in the numerical order shown.
12. Install the crankshaft pulley.
Install the key of the crankshaft.
Insert the pulley by lightly tapping it.
CAUTION:
Do not tap pulley on the side surface where the belt is installed (outer circumference).
13. Tighten the crankshaft pulley bolt.
Lock the crankshaft using suitable tool, then tighten the bolt.
Perform the following steps for angular tightening:
a. Apply engine oil onto the threaded parts of the bolt and seating area.
b. Select the one most visible notch of the four on the bolt flange.
Corresponding to the selected notch, put a mating mark (such
as paint) on the crankshaft pulley.
14. Rotate the crankshaft pulley in normal direction (clockwise when
viewed from engine front) to check for parts interference.
15. Installation of the remaining components is in the reverse order
of removal.
WBIA0468E
Crankshaft pulley bolt torque
Step 1 : 93.1 N·m (9.5 kg-m, 69 ft-lb)
Step 2 : additional 90° (angle tightening)
KBIA2519E
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CAMSHAFT
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CAMSHAFTPFP:13001
Removal and InstallationEBS00LM9
* Refer to GI-45, "Recommended Chemical Products and Sealants" .
REMOVAL
1. Remove the rocker cover (right bank) and (left bank). Refer to EM-33, "ROCKER COVER" .
2. Obtain compression TDC of No. 1 cylinder. Refer to EM-35, "
TIMING CHAIN" .
3. Remove the chain case cover (right bank) and (left bank). Refer to EM-35, "
TIMING CHAIN" .
4. Paint matching marks on the timing chain links aligning with the
camshaft sprocket matching marks.
1. Cylinder head (right bank) 2. Camshaft bracket (No. 2, 3, 4, 5) 3. Valve lifter
4. Camshaft bracket (No. 1) 5. Seal washer 6. Camshaft (right bank EXH)
7. Camshaft (right bank INT) 8. Camshaft (left bank INT) 9. Camshaft (left bank EXH)
10. Camshaft sprocket (right bank EXH) 11. Camshaft sprocket (right bank INT) 12. Camshaft sprocket (left bank INT)
13. Camshaft sprocket (left bank EXH) 14. Camshaft position sensor (PHASE) 15. O-ring
16. Cylinder head (left bank)
WBIA0469E
KBIA2488E
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EM-44Revision: October 2005
CAMSHAFT
2005 QX56
5. Remove the chain tensioner on the left bank using the following steps.
WAR NIN G:
Plunger, spring, and spring seat pop out when squeezing return-proof clip without holding
plunger head. It may cause serious injuries. Always hold plunger head when removing.
a. Squeeze return-proof clip ends using suitable tool and push the
plunger into the tensioner body.
b. Secure plunger using stopper pin.
Stopper pin is made from hard wire approximately 1 mm (0.04
in) in diameter.
c. Remove the bolts and the chain tensioner.
NOTE:
Stop plunger in the fully extended position using return-proof clip
1 if stopper pin is removed.
Push the plunger 2 into the tensioner body while squeezing the
return-proof clip 1. Secure it using stopper pin 3.
6. Remove the right chain tensioner cover from the front cover
using Tool.
CAUTION:
Do not damage mating surfaces.
7. Remove chain tensioner on right bank using the following steps.
WAR NIN G:
Plunger, spring, and spring seat pop out when squeezing return-proof clip without holding
plunger head. It may cause serious injuries. Always hold plunger head when removing.
a. Squeeze return-proof clip ends using suitable tool and push the
plunger into the tensioner body.
b. Secure plunger using stopper pin.
Stopper pin is made from hard wire approximately 1 mm (0.04
in) in diameter.
KBIA2479E
KBIA2483E
Tool number : KV10111100 (J-37228)
KBIA2521E
KBIA2479E
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CAMSHAFT
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c. Remove the bolts and the right bank chain tensioner.
NOTE:
If it is difficult to push plunger on right bank chain tensioner,
remove the plunger under extended condition.
8. Loosen camshaft sprocket bolts as shown and remove camshaft
sprockets.
CAUTION:
To avoid interference between valves and pistons, do not
turn crankshaft or camshaft with timing chain discon-
nected.
9. Remove the front cover bolts.
10. Remove bolts in the reverse of order shown to remove camshaft
brackets.
Remove No. 1 camshaft bracket.
NOTE:
The bottom and front surface of bracket will be stuck because
of liquid gasket.
11. Remove the camshaft.
12. Remove the valve lifters if necessary.
Correctly identify location where each part is removed from.
Keep parts organized to avoid mixing them up.
KBIA2484E
KBIA2485E
KBIA2486E
KBIA2522E
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EM-46Revision: October 2005
CAMSHAFT
2005 QX56
INSPECTION AFTER REMOVAL
Camshaft Runout
1. Put V block on precise flat work bench, and support No. 1 and
No. 5 journals of the camshaft.
2. Set dial indicator vertically to No. 3 journal.
3. Turn the camshaft to one direction, and measure the camshaft
runout on the dial indicator (total indicator reading).
If measurement exceeds specification, replace the camshaft.
Camshaft Cam Height
Measure the camshaft cam height.
If measurement is not within the specifications, replace the cam-
shaft.
Camshaft Journal Clearance
Camshaft Journal Diameter
Measure the diameter of the camshaft journal.
Camshaft Bracket Inner Diameter
Tighten the camshaft bracket bolt to the specified torque.
Measure the inner diameter of the camshaft bracket.
Calculation of Camshaft Journal Clearance
(Journal clearance) = (camshaft bracket inner diameter) – (camshaft
journal diameter)
If measurement is not within specification, replace either or both
camshaft and cylinder head.
NOTE:
The inner diameter of the camshaft bracket is manufactured together with the cylinder head. Replace the
whole cylinder head as an assembly.Standard : Less than 0.02 mm (0.0008 in)
EMK0641D
Standard cam height
(intake & exhaust): 44.465 - 44.655 mm
(1.7506 - 1.7581 in)
Cam wear limit
(intake & exhaust): 0.02 mm (0.0008 in)
PBIC0039E
Standard diameter : 25.953 - 25.970 mm
(1.0218 - 1.0224 in)
PBIC0040E
Standard : 26.000 - 26.021 mm (1.0236 - 1.0244 in)
Standard : 0.030 - 0.068 mm (0.0012 - 0.0027 in)
PBIC1645E
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CAMSHAFT
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Camshaft End Play
Install dial gauge in the thrust direction on the front end of the
camshaft. Measure the end play when the camshaft is moved
forward/backward (in direction to axis).
If measurement is out of the specified range, replace the cam-
shaft and measure again.
If measurement is still out of the specified range, replace the cyl-
inder head.
Measure the following parts if end play is outside the specified
value.
–Dimension "A" for camshaft No. 1 journal
–Dimension "B" for cylinder head No. 1 journal
If measurements are not within specification, replace the cam-
shaft and/or cylinder head.
Camshaft Sprocket Runout
1. Install the camshaft in the cylinder head.
2. Install the camshaft sprocket to the camshaft.
3. Measure the camshaft sprocket runout.
If measurement exceeds the specification, replace the cam-
shaft sprocket.
Valve Lifter
Check if the surface of the valve lifter has any wear or cracks.
If any damage is found, replace the valve lifter.
Select the thickness of the head so that the valve clearance is
within the standard when replacing. Refer to EM-51, "
Va l v e
Clearance" . Standard : 0.115 - 0.188 mm (0.0045 - 0.0074 in)
PBIC0042E
Standard : 30.500 - 30.548 mm (1.2008-1.2027 in)
Standard : 30.360 - 30.385 mm (1.1953-1.1963 in)
KBIA2426J
Runout : Less than 0.15 mm (0.0059 in)
KBIA0181J
KBIA0182E
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EM-48Revision: October 2005
CAMSHAFT
2005 QX56
Valve Lifter Clearance
Valve Lifter Diameter
Measure the diameter of the valve lifter.
Valve Lifter Hole Diameter
Measure the diameter of the valve lifter hole of the cylinder
head, using suitable tool.
Calculation of Valve Lifter Clearance
(Valve lifter clearance) = (valve lifter hole diameter) – (valve lifter
diameter)
If the measurement is not within specification, referring to each
specification of the valve lifter diameter and hole diameter,
replace either or both the valve lifter and cylinder head.
INSTALLATION
1. Install the valve lifters if removed.
Install removed parts in their original locations.
2. Install the camshafts. Refer to the table below for identification of
the right and left bank, and intake and exhaust.
Install so that the dowel pin at the front of the camshaft face is
in the direction shown.Standard : 33.977 - 33.987 mm (1.3377 - 1.3381 in)
JEM798G
Standard : 34.000 - 34.016 mm (1.3386 - 1.3392 in)
Standard : 0.013 - 0.039 mm (0.0005 - 0.0015 in)
PBIC0043E
Bank INT EXHIdentification
paint (front)Identification
paint (rear)Identification
rib
RHINT White — Yes
EXH — Light blue Yes
LHINT White — No
EXH — Light blue No
KBIA2523E
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CAMSHAFT
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3. Install the camshaft brackets.
Install by referring to the installation location mark on the
upper surface.
Install so that the installation location mark can be correctly
read when viewed from the intake manifold side.
Install No. 1 camshaft bracket using the following procedure:
–Apply liquid gasket to No. 1 camshaft bracket as shown.
Use Genuine RTV Silicone Sealant or equivalent. Refer to
GI-45, "
Recommended Chemical Products and Sealants".
CAUTION:
After installation, be sure to wipe off any excessive liq-
uid gasket leaking from part “A” and “B” (both on right
and left sides).
Remove completely any excess of liquid gasket inside
bracket.
–Apply liquid gasket to the back side of the front cover as
shown.
Use Genuine RTV Silicone Sealant or equivalent. Refer to
GI-45, "
Recommended Chemical Products and Sealants".
KBIA2525E
PBIC0035E
KBIA2487E