In Vehicle

WARNING: This page is about a different car, the 2016 Jeep Wrangler and 2015 Jeep Wrangler. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Magnetic Timing Wheels

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CAUTION:

The magnetic timing wheels (1) must not come in contact with magnets (pickup tools, trays, etc.) or any other strong magnetic field. This will destroy the timing wheels ability to correctly relay camshaft position to the camshaft position sensor.

Fig 2: Engine Cover

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Disconnect and isolate the negative battery cable.
Remove the engine cover (1).

Fig 3: Air Cleaner Body, Fresh Air Makeup Hose, Electrical Connector, Clamp, Bolts & Retainers
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Remove the air cleaner body (1). Refer to BODY, AIR CLEANER, REMOVAL .

Fig 4: Identifying Battery Tray Components
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If removing the RH valve springs, remove the battery, Totally Integrated Power Module (TIPM) and battery tray (4). Refer to TRAY, BATTERY, REMOVAL .

Fig 5: Heater Core Return Hose, Heater Core Supply Hose, Nuts & Oil Cooler Return Hose
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If removing the RH valve springs, drain the cooling system. Refer to STANDARD PROCEDURE .
If removing the RH valve springs, remove the heater core supply hose (2), heater core return hose (1) and oil cooler return hose (4) from the heater core tube assembly.
If removing the RH valve springs, remove two nuts (3) and reposition the heater core tube assembly to the front of the engine.

Fig 6: Upper Intake Manifold & Fasteners
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Remove the upper intake manifold (2) and both cylinder head covers. Refer to COVER(S), CYLINDER HEAD, REMOVAL .

Fig 7: A/C Suction & Liquid Line Assembly
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If removing the LH exhaust valve springs, recover the refrigerant from the refrigerant system and remove the A/C suction and liquid line assembly (1 and 5). Refer to LINE, A/C SUCTION, REMOVAL .

Fig 8: Locating Rocker Arms
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NOTE:
The LH cylinder head rocker arms are shown in illustration, the RH cylinder head rocker arms are similar.

NOTE:
Only remove the camshafts from one head at a time. The opposite head must remain assembled in order to lock the crankshaft against rotation.
Remove the camshaft(s). Refer to CAMSHAFT, ENGINE, REMOVAL .
NOTE:
If the rocker arms are to be reused, identify their positions so that they can be reassembled into their original locations.
Remove the rocker arm(s) (1). Refer to ROCKER ARM, VALVE, REMOVAL .

Fig 9: Phaser Timing Marks, Oil Control Valves & RH Camshaft Phaser Lock
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NOTE:
RH camshaft phaser lock shown in illustration, LH camshaft phaser lock similar.

CAUTION:
Air pressure applied to the cylinder holds the valves in place. This air pressure also has a tendency to force the piston down and rotate the crankshaft. Do not allow the crankshaft to rotate. Crankshaft rotation may damage the timing chain or front timing cover and affect camshaft timing.
If removing the LH camshafts, install the RH Camshaft Phaser Lock (special tool #10202, Locks, Camshaft/Phaser) (5) to lock the crankshaft against rotation. If removing the RH camshafts, install the LH Camshaft Phaser Lock (special tool #10202, Locks, Camshaft/Phaser) to lock the crankshaft against rotation.

Fig 10: Shop Air Supply & Valve Spring Compressor
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NOTE:
Number 4 cylinder intake valve spring compression shown in illustration, all other valves similar.
Remove the spark plug. Refer to SPARK PLUG, REMOVAL .
Install Valve Spring Compressor (special tool #MD998772A, Compressor, Valve Spring) (2) onto the cylinder head.
Install a spark plug adapter attached to a regulated shop air supply (1). Pressurize the cylinder being serviced to 620.5 - 689 kPa (90 - 100 psi) to hold the valves in place.
CAUTION:
Air pressure must be maintained as long as the valve springs are removed to prevent the valves from dropping into the cylinders.
Using Valve Spring Compressor Adapter (special tool #10224, Adapter, Valve Spring) (3), compress valve spring (4) and remove valve retaining locks (5).

Fig 11: Valve Spring & Valve Spring Retainer
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NOTE:
If the springs are to be reused, identify their positions so that they can be reassembled into their original locations. Number 5 cylinder exhaust valve spring shown in illustration, all other valve springs similar.
Release the valve spring compression and remove the valve spring retainer (1) and valve spring (2).
If required, remove the valve guide seal and spring seat. Refer to SEAL(S), VALVE GUIDE, REMOVAL .