Removal and Installation: Removal

WARNING: This page is about a different car, the 2018 Nissan Titan XD. However, it is still accessible from the selected car via links, so may be relevant.

WARNING: The fuel system (fuel pump, high pressure fuel lines, fuel rail, injectors) contain very high pressure fuel. To avoid the risk of personal injury or fire:

Do not loosen any fittings while the engine is running.
Wait at least 10 minutes after shutting down the engine before loosening any fittings in the high-pressure fuel system to allow pressure to decrease to a lower level.
Wear appropriate eye protection and protective equipment as high-pressure fuel spray can penetrate the skin.
Never smoke or allow sparks or flames (such as pilot lights, electrical switches, or welding equipment) in the work area. Never allow diesel fuel to spill onto a hot exhaust manifold which can cause a fire.

Remove the rocker covers. Refer to Removal and Installation .

Use Tool (A) on the vibration damper (1), rotate the engine clockwise until cylinder number 1 top dead center (TDC) has been located.

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Locate cylinder number 1 TDC by rotating the engine clockwise until the timing mark on the vibration damper and front cover are aligned. After TDC is located, insert Tool (B).

Tool (A)	:-- - (J-54424)
Tool (B)	:-- - (J-54404)

Verify that the flats (A) on the camshaft are facing upward. If they are not, rotate the crankshaft clockwise 360 degrees until the flats are facing upward.

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NOTE:
- The low portion of the camshaft lobes (B) are located over all four of the rocker arms (1) for cylinder number 1 (intake and exhaust valves).
- Mark the location of all the rocker arms. It is important for the rocker arms to be installed in their original locations.
Obtain a 6.4 mm (0.25 in) wooden or plastic dowel rod (A) that is, at least, 305 mm (12 in) long.

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Insert the rod into the injector bore (B) of cylinder number 1 until the dowel rod contacts the piston. With a permanent marker, place a mark (C) on the dowel rod that is level with the top of the cylinder head injector bore. This will help identify TDC for all the other cylinders.
Remove the rod and place a second mark 13 mm (0.5 in) above the TDC mark.
Rotate the crankshaft clockwise until the second mark aligns with the top of the cylinder head injector bore.
NOTE: Rotating the crankshaft clockwise past TDC gives the valves clearance with the piston when the valve springs are being compressed to remove the rocker arms. This reduces the possibility of disengaging the valve retainers.

Use the following steps for compressing the valve springs:

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Install the compression plate (C) of the suitable tool with the proper orientation for the intake and exhaust valves (etched on the suitable tool).

There is a provision on the suitable tool which uses the adjacent injector for support and location. Slide the compression arm (E) of the suitable all the way forward to allow access to the bolt (A). Tighten the bolt.

Bolt (A)

: 24 N.m (2.4 kg-m, 18 ft-lb)

Slide the compression arm (E) of the suitable tool backward until the marks align. Turn the forcing screw (F) of the suitable tool until it makes contact with the compression plate. Be sure the tip of the threaded bar engages the hole (D) in the compression plate.
Slowly turn the forcing screw until the bottom face of the hex head meets the compression arm.
NOTE: Bank 1 shown, Bank 2 similar.

Remove the rocker arms (1) and (2) for both intake valves and exhaust valves on cylinder number 1.
NOTE: Remember to label the location of the rocker arms during removal.