Removal and Installation
The following information pertains to TSB 10-055
Classification: EM10-012
Reference: ITB10-055
Date: August 19, 2010
QX56; REVISED UPPER OIL PAN AND TIMING CHAIN CASE PROCEDURES
APPLIED VEHICLES: 2004-2010 QX56 (JA60)
SERVICE INFORMATION
Removal and installation procedures for the upper oil pan and timing chain case have been updated to no longer require engine removal and installation.
Infiniti Service Manuals for 2004-2010 QX56 vehicles will be updated with these new procedures. Updated Service Manuals will be distributed to the field as quickly as possible.
The standard Flat Rate Times will be adjusted to reflect the new procedures.
Until the updated Service Manuals are made available please use the procedures hyperlinked below for any upper oil pan and timing chain case-related repairs on an Applied Vehicle.
EM-1
EM-2
EM-3
EM-4
EM-5
EM-6
EM-7
EM-8
EM-9
EM-10
EM-11
TIMING CHAIN
Removal and Installation
NOTE:
- To remove timing chain and associated parts, start with those on the LH bank. The procedure for removing parts on the RH bank is omitted because it is the same as that for removal on the LH bank.
- To install timing chain and associated parts, start with those on the RH bank. The procedure for installing parts on the LH bank is omitted because it is the same as that for installation on the RH bank.
REMOVAL
1. Remove the engine assembly from the vehicle. Refer to Removal and Installation.
2. Remove the following components and related parts:
- Drive belt auto tensioner and idler pulley. Refer to Removal and Installation.
- Thermostat housing and water hose. Refer to Removal and Installation.
- Power steering oil pump bracket. Refer to Removal and Replacement.
- Oil pan (lower), (upper) and oil strainer. Refer to Removal and Installation.
- Ignition coil. Refer to Removal and Installation.
- Rocker cover. Refer to Removal and Installation.
3. Remove the Intake valve timing control solenoid valve cover
(RH) (A) and Intake valve timing control solenoid valve cover
(LH) (B) as follows:
a. Loosen and remove the bolts as shown.
b. Cut the liquid gasket and remove the covers using Tool.
Tool number : KV10111100 (J-37228)
CAUTION:
Do not damage mating surfaces.
4. Obtain compression TDC of No. 1 cylinder as follows:
a. Turn the crankshaft pulley clockwise to align the TDC identification notch (without paint mark) with the timing indicator on the front cover.
b. At this time, make sure both intake and exhaust cam lobes of
No. 1 cylinder (top front on LH bank) point outside.
- If they do not point outside, turn crankshaft pulley once more.
5. Remove the crankshaft pulley.
a. Loosen the crankshaft pulley bolts using a hammer handle to secure the crankshaft.
b. Remove the crankshaft pulley from the crankshaft using tool.
- Remove the crankshaft pulley using suitable tool. Set the bolts in the two bolt holes [M6 x 1.0 mm (0.04 in)] on the front surface.
NOTE:
The dimension between the centers of the two bolt holes is 61 mm (2.40 in).
6. Remove the front cover.
a. Loosen and remove the bolts in the reverse of order shown.
b. Cut the liquid gasket and remove the covers using Tool.
Tool number : KV10111100 (J-37228)
CAUTION:
Do not damage mating surfaces.
7. Remove the front oil seal using suitable tool.
CAUTION:
Do not damage front cover.
8. Remove the oil pump drive spacer.
- Hold and remove the flat space of the oil pump drive spacer by pulling it forward.
9. Remove the oil pump. Refer to Removal and Installation.
10. Remove the chain tensioner on the LH bank using the following steps.
NOTE:
To remove the timing chain and associated parts, start with those on the LH bank. The procedure for removing parts on the RH bank is omitted because it is the same as that for the LH bank.
a. Squeeze the return-proof clip ends using suitable tool and push the plunger into the tensioner body.
b. Secure the plunger using stopper pin.
- Stopper pin is made from hard wire approximately 1 mm (0.04 in) in diameter.
c. Remove the bolts and chain tensioner.
WARNING:
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.
NOTE:
- Stop the plunger in the fully extended position by using the return-proof clip (1) if the 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).
11. Remove the timing chain tension guide and timing chain slack guide.
12. Remove the timing chain and crankshaft sprocket.
13. Loosen the camshaft sprocket bolts as shown and remove the camshaft sprocket.
CAUTION:
To avoid interference between valves and pistons, do not turn crankshaft or camshaft when timing chain is disconnected.
14. Repeat the same procedure to remove the RH timing chain and associated parts.
INSPECTION AFTER REMOVAL
Check for cracks and any excessive wear at link plates. Replace chain if necessary.
- In the same way as for the LH bank, inspect the timing chain and associated parts on the RH bank.
INSTALLATION
NOTE:
- The above figure shows the relationship between the mating mark on each timing chain and that of the corresponding sprocket, with the components installed.
- To install the timing chain and associated parts, start with those on the RH bank. The procedure for installing parts on the LH bank is omitted because it is the same as that for installation on the RH bank.
1. Make sure the crankshaft key and camshaft dowel pin RH bank and camshaft dowel pin LH bank are facing in the direction shown.
2. Install the camshaft sprockets.
- Install the camshaft sprocket INT (VTC) (A) and camshaft sprockets EXH (B) by selectively using the groove of the dowel pin according to the bank. (Common part used for both exhaust banks.)
- Lock the hexagonal part of the camshaft in the same way as for removal, and tighten the bolts.
- B = V: Exhaust
3. Install the crankshaft sprockets for both banks.
- Install LH bank crankshaft sprocket (B) and RH bank crankshaft sprocket (C) so that their flange side (A) (the larger diameter side without teeth) faces in the direction shown.
NOTE:
The same parts are used but facing directions are different.
4. Install the timing chains and associated parts.
- Align the alignment mark on each sprocket and the timing chain for installation.
CAUTION:
- Before installing chain tensioner, it is possible to change the position of alignment mark on timing chain and each sprocket. After the alignment marks are aligned, keep them aligned by holding them by hand.
- Install the slack guides and tension guides onto the correct side by checking the identification mark on the surface.
- Install the chain tensioner with the plunger locked in with the stopper pin.
CAUTION:
- Before and after the installation of the chain tensioner, make sure that the alignment mark on the timing chain is not out of alignment.
- After installing the chain tensioner, remove the stopper pin to release the chain tensioner.
Make sure the tensioner is released.
- To avoid chain-link skipping of the timing chain, do not move crankshaft or camshafts until the front cover is installed.
5. In the same way as for the RH bank, install the timing chain and associated parts on the LH bank.
6. Install the oil pump.
7. Install the oil pump drive spacer as follows:
- Install so that the front mark on the front edge of the oil pump drive spacer faces the front of the engine.
- Insert the oil pump drive spacer according to the directions of the crankshaft key and the two flat surfaces of the oil pump inner rotor.
- If the positional relationship does not allow the insertion, rotate the oil pump inner rotor to allow the oil pump drive spacer to be inserted.
8. Install the front oil seal using suitable tool.
CAUTION:
Do not scratch or make burrs on the circumference of the oil seal.
9. Install the chain tensioner cover.
- Apply liquid gasket as shown.
Use Genuine RTV Silicone Sealant or equivalent. Refer to Fluid Type Specifications.
10. Install the front cover as follows:
a. Install a new O-ring on the cylinder block.
b. Apply liquid gasket as shown.
Use Genuine RTV Silicone Sealant or equivalent. Refer to Fluid Type Specifications.
c. Check again that the timing alignment marks on the timing chain and on each sprocket are aligned. Then install the front cover.
d. Install the bolts in the numerical order shown.
M6 � 50 mm (1.97 in) : No. 1, 20, 25, 26, 27
M6 � 80 mm (3.15 in) : No. 4, 5, 7
M6 � 20 mm (0.79 in) : Except the above
e. After tightening, re-tighten to the specified torque.
CAUTION:
Be sure to wipe off any excessive liquid gasket leaking onto surface mating with oil pan.
11. Install the Intake valve timing control solenoid valve cover (RH)
(A) and Intake valve timing control solenoid valve cover (LH) (B) as follows:
- *: Cross mark (C) that can not be seen after assembly
D : 2.6 - 3.6 mm (0.102 - 0.142 in) dia.
a. Apply liquid gasket (D) as shown.
Use Genuine RTV Silicone Sealant or equivalent. Refer to Fluid Type Specifications.
CAUTION:
The start and end of the application of the liquid gasket should be crossed at a position that cannot be seen after attaching the Intake valve timing control solenoid valve cover.
b. Install the bolts and tighten them to specification in the numerical order shown.
- A: Intake valve timing control solenoid valve cover (RH)
- B: Intake valve timing control solenoid valve cover (LH)
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 alignment mark
(such as paint) on the crankshaft pulley.
Crankshaft pulley bolt torque
Step 1 : 93.1 Nm (9.5 kg-m, 69 ft-lb)
Step 2 : additional 90° (angle tightening)
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 of 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.
- 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 oils/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:
