Jeep Grand Cherokee WK. Manual — part 1215
VALVE TIMING
DESCRIPTION
SPECIFICATION
Intake
Opens (BTDC)
7.0°
Closes (ATDC)
253.0°
Exhaust
Opens (BTDC)
233°
Closes (ATDC)
27°
Duration
253.70°
Valve Overlap
34°
CYLINDER HEAD
DESCRIPTION
SPECIFICATION
Valve Seat Angle
44.5° - 45.0°
Valve Seat Runout (MAX)
0.05 mm (0.0019 in.)
Valve Seat Width (Finish)
Intake
1.018 - 1.62 mm
(0.0464 - 0.0637 in.)
Exhaust
1.48 - 1.92 mm
(0.0582 - 0.0755 in.)
Guide Bore Diameter (Std.)
7.975 - 8.00 mm
(0.313 - 0.314 in.)
HYDRAULIC TAPPETS
DESCRIPTION
SPECIFICATION
Metric
Standard
Body Diameter
21.387 - 21.405 mm
0.8420 - 0.8427 in.
Clearance (To Bore)
0.020 - 0.063 mm
0.0007 - 0.0024 in.
Dry Lash
3.0 mm (at the valve)
0.1181 in.
VALVES
DESCRIPTION
SPECIFICATION
Face Angle
45.0° - 45.5°
Head Diameter
Intake
50.67 - 50.93 mm
(1.99 - 2.00 in.)
Exhaust
39.27 - 39.53 mm
(1.54 - 1.55 in.)
Length (Overall)
Intake
123.38 - 123.76 mm
9 - 1456
ENGINE - 5.7L SERVICE INFORMATION
WK
DESCRIPTION
SPECIFICATION
(4.857 - 4.872 in.)
Exhaust
120.475 - 120.855 mm
(4.743 - 4.758 in.)
Stem Diameter
Intake
7.935 - 7.953 mm
(0.312 - 0.313 in.)
Exhaust
7.905 - 7.925 mm
(0.311 - 0.312 in.)
Stem - to - Guide Clearance
Intake
0.022 - 0.065 mm
(0.0008 - 0.0025 in.)
Exhaust
0.050 - 0.095 mm
(0.0019 - 0.0037 in.)
Valve Lift ( @ Zero Lash)
Intake
12.0 mm (0.472 in.)
Exhaust
11.70 mm (0.460 in.)
VALVE SPRING
DESCRIPTION
SPECIFICATION
Spring Force (Valve Closed)
Intake and Exhaust
418.0 N +/- 30.0 N @ 46 mm
(93.0 lbs +/- 7.0 lbs. @ 1.811 in.)
Spring Force (Valve Open)
1077.0 N +/- 47.0 N @ 33.6 mm.
Intake and Exhaust
( 242.0 lbs. +/- 11 lbs. @ 1.322 in. )
Free Length (approx)
57.3 mm (2.256 in.)
Number of Coils
Intake and Exhaust
7.4
Wire Diameter
Intake and Exhaust
5.39 × 4.52 mm
(0.212 - 0.177 in.)
Installed Height (Spring Seat to Bottom of Retainer)
Intake and Exhaust
46.0 mm (1.81 in.)
OIL PUMP
DESCRIPTION
SPECIFICATION
Clearance Over Rotors (MAX)
0.095 mm (0.0038 in.)
Outer Rotor to Pump Body Clearance (MAX)
.235 mm (.009 in.)
Tip Clearance Between Rotors (MAX)
0.150 mm (0.006 in.)
WK
ENGINE - 5.7L SERVICE INFORMATION
9 - 1457
OIL PRESSURE
SPECIFICATION
SPECIFICATION
At Curb Idle Speed (MIN)*
25 kPa (4 psi)
@ 3000 rpm
170 - 758 kPa (25 - 110 psi)
* CAUTION: If pressure is zero at curb idle, DO NOT run engine
TORQUE
TORQUE CHART 5.7L ENGINE
DESCRIPTION
N·m
Ft.
In.
Lbs.
Lbs.
Block Pipe Plugs
(1/4 NPT)
20
—
177
(3/8 NPT)
27
—
240
Camshaft Sprocket—Bolt
122
90
—
Camshaft Tensioner Plate—Bolts
28
—
250
Timing Chain Case Cover—Bolts
28
—
250
Lifting Stud
55
40
—
Connecting Rod Cap—Bolts
21
plus 90° Turn
15
plus 90° Turn
—
Main Bearing Cap—Bolts
M-12
27
plus 90° Turn
—
—
Crossbolts
M-8
28
—
—
Cylinder Head—Bolts
M-12 Bolts
Step 1
34
25
—
Step 2
54
40
—
Step 3
Turn 90°
Turn 90°
—
M-8 Bolts
—
Step 1
20
15
—
Step 2
34
25
—
Cylinder Head Cover—Bolts
8
—
70
Exhaust Manifold to Cylinder Head
25
—
220
Flexplate to crankshaft—Bolts
95
70
—
Flywheel to crankshaft—Bolts
75
55
—
Front Insulator—Through bolt/nut
95
70
—
Front Insulator to Block—Bolts
95
70
—
Generator—Mounting Bolt
55
40
—
Intake Manifold—Bolts
Refer to Procedure
Lifter Guide Holder
12
—
106
Oil Pan Bolts
12
-
105
Oil Dipstick Tube
12
—
105
Oil Pan—Drain Plug
27
20
—
Oil Pump—Attaching Bolts
28
—
250
9 - 1458
ENGINE - 5.7L SERVICE INFORMATION
WK
DESCRIPTION
N·m
Ft.
In.
Oil Pump Pickup Tube – Bolt and Nut
28
—
250
Rear Seal Retainer Attaching Bolts
15
—
132
Rear Insulator to Bracket—
68
50
—
Rear Insulator to Crossmember
41
30
—
Rear Insulator to Transmission—
68
50
—
Rear Insulator Bracket—Bolts
68
50
—
Rocker Arm—Bolts
22
—
195
Spark Plugs
—
—
—
Thermostat Housing—Bolts
28
—
250
Throttle Body—Bolts
12
—
105
Vibration Damper—Bolt
176
129
—
Water Pump to Timing Chain
28
—
250
Case Cover—Bolts
WK
ENGINE - 5.7L SERVICE INFORMATION
9 - 1459
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