Removal and Installation

FRONT TIMING CHAIN CASE

Removal and Installation

NOTE:
- This section describes the procedure for removal/installation of the front timing chain case in vehicle and without removing the oil pan (upper). Remove the engine prior to following this procedure if the engine is to be removed to facilitate other repairs.
- To remove the rear timing chain case, remove the engine from the vehicle. Refer to "Removal and Installation" Removal and Installation
- Refer to "Exploded View" Exploded View for component parts location.
Revision: March 20122013 Infiniti JX
- When removing components such as hoses, tubes/lines, etc., cap or plug openings to prevent fluid from spilling.

REMOVAL

1.Remove engine room cover. Refer to "Removal and Installation" Exploded View.
2.Remove cowl top and cowl top lower panel extension. Refer to "Removal and Installation" Removal and Installation.
3.Drain the engine oil. Refer to "Changing Engine Oil" Removal and Replacement.
4.Disconnect engine coolant reservoir hose from the radiator and remove engine coolant reservoir.
5.Remove the radiator. Refer to "Removal and Installation" Removal and Installation.
6.Remove the radiator shroud and cooling fan assembly. Refer to "Removal and Installation" Removal and Installation.
7.Remove battery tray and bracket. Refer to "Removal and Installation" Service and Repair.
8.Remove the electric power steering oil pump motor assembly and bracket. Refer to "Removal and Installation" Removal and Installation.





9.If removing the timing chains, obtain compression TDC of No. 1
cylinder as follows:
a.Rotate crankshaft pulley clockwise to align timing mark (grooved line without color) with timing indicator (A).





b.Check that intake and exhaust camshaft lobes on No. 1 cylinder (RH of engine) are located as shown.
- If not, turn the crankshaft one revolution (360�) and align as shown.
NOTE:
The graphic shows the RH bank of the engine. The camshaft lobes on the LH bank are clocked differently.
10.Remove the water pump. Refer to "Removal and Installation" Removal and Installation.
11.Lock the drive plate using Tool.





CAUTION:
Do not damage the ring gear teeth or the signal plate teeth behind the ring gear when setting the
Tool.
12.Remove the crankshaft pulley as follows:
a.Loosen crankshaft pulley bolt and locate bolt seating surface at 10 mm (0.39 in) from its original position.
Revision: March 20122013 Infiniti JX





b.Position a suitable tool at recess hole of crankshaft pulley to remove crankshaft pulley.

CAUTION:
Do not use a puller claw on the outer diameter of the crankshaft pulley.
13.Remove the generator and generator bracket. Refer to "Removal and Installation" Removal and Installation.
14.Support the engine with suitable tool and remove the RH engine insulator, mount and bracket. Refer to
"2WD : Exploded View" Exploded View (2WD) or "AWD : Exploded View" Exploded View (AWD).
15.Disconnect the oil pressure switch harness connector.
16.Remove the lower oil pan. Refer to "Removal and Installation (Lower Oil Pan)" Lower Oil Pan.
17.Remove engine mounting bracket (front). Refer to "2WD : Exploded View" Exploded View.
18.Disconnect valve timing control solenoid harness connector.





19.Remove the intake valve timing control cover RH (A) and intake valve timing control cover LH (B).
a.Loosen the intake valve timing control cover RH and intake valve timing control cover LH bolts in the reverse order as shown.

CAUTION:
The shaft in the intake valve timing control cover is inserted into the center hole of the intake camshaft sprocket.
Remove the intake valve timing control cover by pulling straight out until the intake valve timing control cover disengages from the camshaft sprocket.










20.Remove the front timing chain case.
a.Loosen the front timing chain case bolts in the reverse order shown.
Revision: March 20122013 Infiniti JX





b.Insert the appropriate size tool into the notch (A) at the top of the front timing chain case as shown.
c.Pry off the case by moving the suitable tool (B) as shown.
- Cut liquid gasket for removal using Tool.

CAUTION:
- Do not use a screwdriver or similar tool.
- After removal, handle carefully so it does not bend or warp under a load.





21.Remove O-rings (1) from rear timing chain case.






CAUTION:
Use new O-rings for installation.





22.Remove the front oil seal from the front timing chain case using a suitable tool.

CAUTION:
Do not damage the front cover.





23.Remove all old liquid gasket from all the bolt holes and bolts.

CAUTION:
Do not damage the threads or mating surfaces.





24.Use a scraper to remove all of the old liquid gasket from the front timing chain case and opposite mating surfaces.

CAUTION:
Do not damage the mating surfaces.
Revision: March 20122013 Infiniti JX

INSTALLATION






1.Install dowel pins (right and left) into front timing chain case up to a point close to taper in order to shorten protrusion length.
NOTE:
Be sure to place the dowel pins in original hole locations in the front timing chain case.





2.Install the new front oil seal on the front timing chain case. Apply new engine oil to the oil seal edges.
NOTE:
Install it so that each seal lip is oriented as shown.





a.Install the new front oil seal so that it becomes flush with the face of front timing chain case using suitable tool.

CAUTION:
Press fit straight and avoid causing burrs or tilting the oil seal.
NOTE:
Make sure the garter spring is in position and seal lip is not inverted.





3.Install new O-rings (1) on rear timing chain case.






CAUTION:
Do not reuse O-rings.
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4.Apply liquid gasket to front timing chain case as shown.
- Use Genuine Silicone RTV Sealant or equivalent. Refer to GI22, "Recommended Chemical Products and Sealants".
- Before installation, wipe off the protruding liquid gasket.
- (C): 2.6 - 3.6 mm (0.102 - 0.142 in) diameter.

CAUTION:
- Installation should be done within 5 minutes after applying liquid gasket.
- Do not fill the engine with oil for at least 30 minutes after the components are installed to allow the liquid gasket to cure.
5.Install the front timing chain case by aligning the dowel pin on the rear timing chain case with the dowel pin hole in front timing chain case.





6.Loosely install the front timing chain case bolts.





7.Tighten the front timing chain case bolts in the order shown.
- Retighten the front timing chain case bolts in the order shown.





8.Install intake valve timing control cover RH and intake valve timing control cover LH.
a.Install new seal rings in shaft grooves.

CAUTION:
- When replacing seal rings, replace all rings with new ones on both intake valve timing control cover RH and intake valve timing control cover LH.
- Do not reuse O-rings.
b.Install intake valve timing control cover RH and intake valve timing control cover LH with new gaskets to front timing chain case.

CAUTION:
Ensure the seal ring remains in the shaft groove.
c.Being careful not to move seal ring from the installation groove, align the dowel pins on the front timing chain case with the holes to install valve timing control covers.
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d.Tighten bolts in the numerical order as shown.










9.Install the water pump. Refer to "Removal and Installation" Removal and Installation.
10.Install crankshaft pulley and tighten the bolt in two steps.
- Lubricate thread and seat surface of the bolt with new engine oil.
- For the second step, angle tighten using Tool.

CAUTION:
- Do not damage the front oil seal when inserting crankshaft pulley.
- Use only brass or plastic hammer if tapping on the crankshaft pulley.
- Never hammer on pulley grooves.










11.Remove the Tool to unlock the driveplate.





CAUTION:
Do not damage the ring gear teeth or the signal plate teeth behind the ring gear when removing the Tool.
12.Rotate crankshaft pulley in normal direction (clockwise when viewed from front) to confirm it turns smoothly.
13.Installation of the remaining components is in the reverse order of removal.

INSPECTION AFTER INSTALLATION

- Before starting engine, check oil/fluid levels including engine coolant and engine oil. If there is less 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 fuel piping, check for fuel leakage 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.
NOTE:
Revision: March 20122013 Infiniti JX
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 engine, again check oil/fluid levels including engine oil and engine coolant. Refill to specified level, if necessary.
- Summary of the inspection items:





Revision: March 20122013 Infiniti JX