Service Library Culata Wrangler 3.6

7/10/21 10:23 techCONNECT Content
09 - Engine, 3.6L / Cylinder Head / Installation
LEFT
Special Tools: Click to display a list of tools used in this procedure
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.
1. If removed, install the Engine Coolant Temperature (ECT) sensor and the ignition coil capacitor and tighten to the
proper (Torque Specifications) .
CAUTION: The cylinder head bolts are tightened

using a torque plus angle procedure. The
bolts must be examined BEFORE reuse. If
the threads are necked down the bolts
must be replaced.
NOTE: Typical cylinder head bolt shown.

2. Check cylinder head bolts for necking by holding a scale or
straight edge against the threads. If all the threads do not contact the scale (2) the bolt must be replaced.
NOTE: Right head gasket shown, left head gasket

similar.
CAUTION: When cleaning cylinder head and cylinder

block surfaces, DO NOT use a metal
scraper because the surfaces could be
cut or ground. Use ONLY a wooden or
plastic scraper.
3. Clean and prepare the gasket sealing surfaces of the

cylinder head and block (Refer to 09 - Engine - Standard
Procedure) .
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CAUTION: Non-compressible debris such as oil,
coolant or RTV sealants that are not
removed from bolt holes can cause the
aluminum casting to crack when
tightening the bolts.
4. Clean out the cylinder head bolt holes in the engine block.
WARNING: The multi-layered steel head gaskets

have very sharp edges that could cause
personal injury if not handled carefully.
CAUTION: The installation of the cylinder head

gaskets are not interchangeable between
the left and right cylinder heads. They are
clearly marked (3) with "R" for right and
"L" for left. They must be applied on a dry
surface, without the use of any
adhesives.
5. Position the new cylinder head gasket (1) on the locating dowels (2).
6. Position the cylinder head onto the cylinder block. Make

sure the cylinder head seats fully over the locating dowels.
NOTE: Do not apply any additional oil to the bolt

threads.
7. Install the eight head bolts finger tight.
8. Tighten the cylinder head bolts in the sequence shown,
following this 9 step torque plus angle method. The torque
sequence must be used for each step. Tighten according
to the following torque values:
Step 1: All to 30 N·m (22 ft. lbs.)

Step 3: Re-tighten all to 45 N·m (33 ft. lbs.)
Step 4: All + 125° Turn (optional angle if 125°
rotation cannot be accomplished in one motion;
tighten all by turning 35° followed by tightening all
by turning 90°) Do not use a torque wrench for
this step.
Step 5: Loosen all fasteners in reverse of sequence shown
Step 8: Re-tighten all to 45 N·m (33 ft. lbs.)
Step 9: All + 130° Turn (optional angle if 130° rotation cannot be accomplished in one motion; tighten all by
turning 40° followed by tightening all by turning 90°) Do not use a torque wrench for this step.
NOTE: For engine builds using a new block follow steps 1–9. For engine re-builds (reuse block) follow step 6–9.
NOTE: If the hydraulic lifters are being reused,

reassemble them into their original locations.
9. If removed, install the hydraulic lifters (Refer to 09 -
Engine/Cylinder Head/LIFTER(S) , Hydraulic - Installation)
NOTE: If the rocker arms are being reused,

reassemble them into their original locations.
CAUTION: Do not rotate the camshafts more than a

few degrees independently of the
crankshaft. Valve to piston contact could
occur resulting in possible valve damage.
If the camshafts need to be rotated more
than a few degrees, first move the pistons
away from the cylinder heads by rotating
the crankshaft counterclockwise to a
position 30° before-top-dead-center. Once
the camshafts are returned to their top-
dead-center position, rotate the
crankshaft clockwise to return the
crankshaft to top-dead-center.
10. Install the rocker arms and camshafts (Refer to 09 -

Engine/Cylinder Head/CAMSHAFT, Engine - Installation)
11. Rotate the camshafts CW to TDC by positioning the
alignment holes (1) vertically.
12. Install the LH cam chain guide (2) with two bolts (4).
Tighten the T30 bolts (4) to 12 N·m (106 in. lbs.).
13. Install the LH cam chain tensioner (5) to the cylinder head
with two bolts (6). Tighten the T30 bolts (6) to 12 N·m (106
in. lbs.).
14. Reset the LH cam chain tensioner (5) by lifting the pawl
(3), pushing back the piston and installing Tensioner Pin
8514A (7) (Refer to 09 - Engine/Valve Timing - Standard
Procedure) .
15. Install the LH tensioner arm (1).
16. Press the LH intake cam phaser onto the intake camshaft.
Install and hand tighten the oil control valve.
CAUTION: Always reinstall timing chains so that

they maintain the same direction of
rotation. Inverting a previously run chain
on a previously run sprocket will result in
excessive wear to both the chain and
sprocket.
17. Drape the left side cam chain over the LH intake cam
phaser and onto the idler sprocket (1) so that the arrow (3)
is aligned with the plated link (2) on the cam chain.
18. While maintaining this alignment, route the cam chain

around the exhaust and intake cam phasers so that the
plated links are aligned with the phaser timing marks (1).
Position the left side cam phasers so that the arrows (3)
point toward each other and are parallel to the valve cover
sealing surface (5). Press the exhaust cam phaser onto the
exhaust cam, install and hand tighten the oil control valve
(2).
NOTE: Minor rotation of a camshaft (a few degrees)

may be required to install the camshaft
phaser or phaser lock.
19. Install the LH Camshaft Phaser Lock 10202 (4) and tighten
the oil control valves (2) and (6) to 150 N·m (110 ft. lbs.).
20. Remove the LH Camshaft Phaser Lock 10202 .

21. Remove the Tensioner Pin 8514A (1) from the LH cam chain tensioner.
22. Rotate the crankshaft CW two complete revolutions stopping when the dimple (4) on the crankshaft is aligned the
with the block/bearing cap junction (5).
23. While maintaining this alignment, verify that the arrows on the left side cam phasers (2) point toward each other and
are parallel to the valve cover sealing surface (3) and that the right side cam phaser arrows (7) point away from
each other and the scribe lines (9) are parallel to the valve cover sealing surface (8).
24. There should be 12 chain pins (2) between the exhaust cam phaser triangle marking (1) and the intake cam phaser
circle marking (3).
25. If the engine timing is not correct, repeat this procedure.
26. Install the engine timing cover (Refer to 09 - Engine/Valve Timing/COVER(S) , Engine Timing - Installation).
27. Connect the ignition coil capacitor electrical connector (1).
28. Install the A/C compressor (2) onto the engine with four
bolts (1) tightened to 28 N·m (21 ft. lbs.).
29. Install the accessory drive belt (7) (Refer to 07 -

Cooling/Accessory Drive/BELT, Serpentine - Installation) .
30. Install the right and left cylinder head covers (Refer to 09 -
Engine/Cylinder Head/COVER(S) , Cylinder Head -
Installation).
NOTE: Right catalytic converter shown, left catalytic

converter similar.
31. Install the left catalytic converter (Refer to 11 - Exhaust
System/CONVERTER, Catalytic - Installation) .
32. Connect the upstream (3) and downstream (1) oxygen
sensor connectors to the main wire harness.
33. Install the upper and lower intake manifolds (Refer to 09 -

Engine/Manifolds/MANIFOLD, Intake - Installation)
34. Install the front wheelhouse inner splash shields (Refer to
23 - Body/Exterior/SHIELD, Splash - Installation) .
35. Install the air inlet hose and the air cleaner body (Refer to 09 - Engine/Air Intake System/BODY, Air Cleaner -
Installation) .
36. If removed, install the oil filter and fill the engine crankcase with the proper oil to the correct level (Refer to 09 -
Engine/Lubrication/OIL - Standard Procedure)
37. Fill the cooling system (Refer to 07 - Cooling - Standard Procedure) .
38. Connect the negative battery cable.
39. Run the engine until it reaches normal operating temperature. Check cooling system for correct fluid level (Refer to
07 - Cooling - Standard Procedure)
NOTE: The Cam/Crank Variation Relearn procedure must be performed using the scan tool anytime there has
been a repair/replacement made to a powertrain system, for example: flywheel, valvetrain, camshaft
and/or crankshaft sensors or components.

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7/10/21 10:23 techCONNECT Content

09 - Engine, 3.6L / Cylinder Head / Installation

CAUTION: The cylinder head bolts are tightened

NOTE: Typical cylinder head bolt shown.

NOTE: Right head gasket shown, left head gasket

CAUTION: When cleaning cylinder head and cylinder

3. Clean and prepare the gasket sealing surfaces of the

WARNING: The multi-layered steel head gaskets

CAUTION: The installation of the cylinder head

6. Position the cylinder head onto the cylinder block. Make

NOTE: Do not apply any additional oil to the bolt

Step 1: All to 30 N·m (22 ft. lbs.)

NOTE: If the hydraulic lifters are being reused,

NOTE: If the rocker arms are being reused,

CAUTION: Do not rotate the camshafts more than a

10. Install the rocker arms and camshafts (Refer to 09 -

CAUTION: Always reinstall timing chains so that

18. While maintaining this alignment, route the cam chain

NOTE: Minor rotation of a camshaft (a few degrees)

20. Remove the LH Camshaft Phaser Lock 10202 .

27. Connect the ignition coil capacitor electrical connector (1).

29. Install the accessory drive belt (7) (Refer to 07 -

NOTE: Right catalytic converter shown, left catalytic

33. Install the upper and lower intake manifolds (Refer to 09 -

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