SPECIFICATIONS-5.7L ENGINE
| DESCRIPTION | SPECIFICATION |
|---|
| Engine Type | 90° V-8 OHV |
| Displacement | 5.7 Liters |
| 345 (Cubic Inches) |
| Bore | 99.5 mm (3.91 in.) |
| Stroke | 90.9 mm (3.58 in.) |
| Compression Ratio | 9.6:1 |
| Max. Variation Between Cylinders | 25% |
| Firing Order | 1-8-4-3-6-5-7-2 |
| Lubrication | Pressure Feed - Full Flow |
| Filtration |
| Cooling System | Liquid Cooled - Forced |
| Circulation |
| Cylinder Block | Cast Iron |
| Cylinder Head | Aluminum |
| Crankshaft | Nodular Iron |
| Camshaft | Hollow Assembled Camshaft |
| Pistons | Aluminum Alloy |
| Connecting Rods | Powdered Metal |
| CYLINDER BLOCK |
|---|
| DESCRIPTION | SPECIFICATION |
| Metric | Standard |
| Cylinder Bore Diameter | 99.50 mm | 3.917 in. |
| Out of Round (MAX) | 0.0076 mm | 0003 in. |
| Taper (MAX) | 0.0127 mm | 0.0005 in. |
| Lifter Bore Diameter | 21.45 - 21.425 mm | 0.8444 - 0.8435 in. |
| PISTONS |
|---|
| DESCRIPTION | SPECIFICATION |
| Metric | Standard |
| Clearance | 0.0215 - 0.0485 mm | 0.0008 - 0.0019 in. |
| Measured at 38.0 mm (1.5 in.) Below Deck |
| Ring Groove Diameter |
| Groove #1 | 89.6 - 89.8 mm | 3.527 - 3.535 in. |
| Groove #2 | 88.1 - 88.3 mm | 3.468 - 3.476 in. |
| Weight | 414.5 grams | 14.62 oz. |
| Piston Length | 54.70 - 55.30 | 2.153 - 2.177 in. |
| Ring Groove Width |
| No. 1 | 1.51 - 1.54 mm | 0.0594 - 0.0606 in |
| No. 2 | 1.51 - 1.53 mm | 0.0594 - 0.0602 in. |
| No. 3 | 3.030 - 3.055 mm | 0.1192 - 0.1202 in. |
| PISTON PINS |
|---|
| DESCRIPTION | SPECIFICATION |
| Metric | Standard |
| Clearance In Piston | 0.009 - 0.018 mm | 0.00035 - 0.0007 in. |
| Diameter | 24.0 - 24.003 mm | 0.9448 - 0.9449 in. |
| Length | 70.53 - 71.03 mm | 2.78 - 2.80 in. |
| PISTON RINGS |
|---|
| DESCRIPTION | SPECIFICATION |
| Metric | Standard |
| Ring Gap |
| Top Compression Ring | 0.23 - 0.38 mm | 0.0090 - 0.0149 in. |
| Second Compression Ring | 0.35 - 0.60 mm | 0.0137 - 0.0236 in. |
| Oil Control (Steel Rails) | 0.15 - 0.66 mm | 0.0059 - 0.0259 in. |
| Side Clearance | |
| Top Compression Ring | .02 -.068 mm | 0.0007 - 0.0026 in. |
| Second Compression Ring | 0.02 - 0.058 mm | 0.0007 - 0.0022 in. |
| Oil Ring (Steel Ring) | .019 -.229 mm | .0007 -.0091 in. |
| Ring Width |
| Top Compression Ring | 1.472 - 1.490 mm | 0.0579 - 0.0586 in. |
| Second Compression Ring | 1.472 - 1.490 mm | 0.0579 - 0.0586 in. |
| Oil Ring (Steel Rails) | 0.447 - 0.473 mm | 0.0175 - 0.0186 in. |
| CONNECTING RODS |
|---|
| DESCRIPTION | SPECIFICATION |
| Metric | Standard |
| Piston Pin Bore Diameter | 23.955 - 23.975 mm | 0.9431 - 0.9438 in. |
| Side Clearance | 0.10 - 0.35 mm | 0.003 - 0.0137 in. |
| CRANKSHAFT |
|---|
| DESCRIPTION | SPECIFICATION |
| Metric | Standard |
| Main Bearing Journal Diameter | 64.988 - 65.012 mm | 2.5585 - 2.5595 in. |
| Bearing Clearance | 0.023 - 0.051 mm | 0.0009 - 0.002 in. |
| Out of Round (MAX) | 0.005 mm | 0.0002 in. |
| Taper (MAX) | 0.003 mm | 0.0001 in. |
| End Play | 0.052 - 0.282 mm | 0.002 - 0.011 in. |
| End Play (MAX) | 0.282 mm | 0.011 in. |
| Connecting Rod Journal Diameter | 53.992 - 54.008 mm | 2.125 - 2.126 in. |
| Bearing Clearance | 0.020 - 0.060 mm | 0.0007 - 0.0023 in. |
| Out of Round (MAX) | 0.005 mm | 0.0002 in. |
| Taper (MAX) | 0.003 mm | 0.0001 in. |
| CAMSHAFT |
|---|
| DESCRIPTION | SPECIFICATION |
| Metric | Standard |
| Bearing Journal Diameter | | |
| No. 1 | 58.2 mm | 2.29 in. |
| No. 2 | 57.8 mm | 2.27 in. |
| No. 3 | 57.4 mm | 2.26 in. |
| No. 4 | 57.0 mm | 2.24 in. |
| No. 5 | 43.633 mm | 1.72 in. |
| Bearing To Journal Clearance Standard |
| No. 1 | 0.040 - 0.080 mm | .0015 -.003 in. |
| No. 2 | 0.050 -0.090 mm | 0.0019 -.0035 in. |
| No. 3 | 0.040 - 0.080 mm | .0015 -.003 in. |
| No. 4 | 0.050 - 0.090 mm | 0.0019 -.0035 in. |
| No. 5 | 0.040 - 0.080 mm | .0015 -.003 in. |
| Camshaft End Play | .080 - 0.290 mm | 0.0031 - 0.0114 in. |
| VALVE TIMING |
|---|
| DESCRIPTION | SPECIFICATION |
| Intake |
| Opens (BTDC) | 5.0° |
| Closes (ATDC) | 255.0° |
| Exhaust |
| Opens (BTDC) | 236° |
| Closes (ATDC) | 32° |
| Duration | 269.3° |
| Valve Overlap | 37° |
| 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 | 1.18 - 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 |
| (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 | 7.932 - 7.950 mm |
| (0.312 - 0.313 in.) |
| Stem - to - Guide Clearance |
| Intake | 0.022 - 0.065 mm |
| (0.0008 - 0.0025 in.) |
| Exhaust | 0.025 - 0.065 mm |
| (0.0009 - 0.0025 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 | 435.0 N +/- 22.0 N @ 45 mm (97.8 lbs +/- 5.0 lbs. @ 1.771 in.) |
| Spring Force (Valve Open) | 1077.0 N +/- 48.0 N @ 32.6 mm. |
| Intake and Exhaust | (242.0 lbs. +/- 11 lbs. @ 1.283 in. ) |
| Free Length (approx) | 55.6 mm (2.189 in.) |
| Number of Coils |
| Intake and Exhaust | 7.95 |
| Wire Diameter |
| Intake and Exhaust | 4.95 x 4.1 mm |
| (0.194 - 0.161 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.) |
| 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 SPECIFICATIONS
| DESCRIPTION | N.m | Ft. | In. |
|---|
| | Lbs. | Lbs. |
| Block Pipe Plugs (1/4 - 18 NPT) oil galley plug | 20 | | 177 |
| (1/4 - 18 NPT) Coolant Drain Plug | 34 | | 300 |
| (3/8 NPT) | 27 | | 240 |
| Camshaft Sprocket-Bolt | 122 | 90 | |
| Camshaft Tensioner Plate-Bolts | 28 | | 250 |
| Coil to Cylinder Head Cover-Bolts | 7 | | 62 |
| 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 and Double Ended Hex M-12 | 28 plus 90° Turn | | |
| Cross bolts M-8 | 31 | | |
| 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 Support Bracket |
| Stud Nut (4WD) | 41 | 30 | |
| Through Bolt/Nut (4WD) | 102 | 75 | |
| Front Insulator to Block-Bolts (2WD) | 95 | 70 | |
| Generator-Mounting Bolt | 55 | 40 | |
| Intake Manifold-Bolts | Refer to INSTALLATION |
| Lifter Guide Holder | 12 | | 106 |
| Oil Pan Bolts | 12 | | 105 |
| Oil Dipstick Tube | 12 | | 105 |
| Oil Pan-Drain Plug | 34 | 25 | |
| Oil Pump-Attaching Bolts | 28 | | 250 |
| Oil Pump Pickup Tube - Bolt and Nut | 28 | | 250 |
| Rear Seal Retainer Attaching Bolts | 15 | | 132 |
| Rear Insulator to Bracket | 68 | 50 | |
| Through-Bolt (2WD) |
| Rear Insulator to Crossmember | 41 | 30 | |
| Support Bracket-Nut (2WD) |
| Rear Insulator to Crossmember | 68 | 50 | |
| Nuts (4WD) |
| Rear Insulator to Transmission | 68 | 50 | |
| Bolts (4WD) |
| Rear Insulator Bracket-Bolts | 68 | 50 | |
| (4WD Automatic) |
| Rear Support Bracket to | 41 | 30 | |
| Crossmember Flange-Nuts |
| Rear Support Plate to Transfer | 41 | 30 | |
| Case-Bolts |
| Rocker Arm-Bolts | 22 | | 195 |
| Spark Plugs | | | |
| Thermostat Housing-Bolts | 28 | | 250 |
| Throttle Body-Bolts | 12 | | 105 |
| Transfer Case to Insulator | 204 | 105 | |
| Mounting Plate-Nuts |
| Transmission Support Bracket | 68 | 50 | |
| Bolts (2WD) |
| Vibration Damper-Bolt | 176 | 129 | |
| Water Pump to Timing Chain | 28 | | 250 |
| Case Cover-Bolts |
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Scheme 373
Scheme 374
| 1 - DEACTIVATING LIFTERS |
|---|
| 2 - SOLENOIDS |
| 3 - LIFTER OIL GALLERY |
| 4 - MAIN OIL GALLERY |
The Multiple Displacement System (MDS) provides cylinder deactivation during steady-speed, low-acceleration and shallow grade climbing conditions to increase fuel economy.
MDS can provide a 5-20 percent fuel economy benefit when operating in four-cylinder mode, depending on driving habits and vehicle usage. For EPA rating purposes, fuel economy is 8-15 percent higher than if the engine was operating on eight cylinders at all times.
MDS is integrated into the basic engine architecture, requiring a minimum of additional parts - four additional solenoids, an oil temperature sensor and a wire harness. Eight unique valve lifters and a modified camshaft are also required.
Scheme 375
The Multiple Displacement System (MDS) provides cylinder deactivation during steady-speed, low-acceleration and shallow grade climbing conditions to increase fuel economy. Both four- and eight-cylinder configurations have even firing intervals, providing smooth operation. Two cylinders on each bank are active when the engine is in four-cylinder mode - every other cylinder in the firing order. All of the cylinders that are deactivated have unique hydraulic valve lifters that collapse when deactivated to prevent the valves from opening. Engine oil pressure is used to activate and deactivate the valves. It is delivered through special oil passages drilled into the cylinder block. Solenoid valves control the flow. When activated, pressurized oil pushes a latching pin on each valve lifter, which then becomes a "lost motion" link. Its base follows the camshaft, but its top remains stationary, held in place against the pushrod by light spring pressure but unable to move because of the much higher force of the valve spring.
Note. It is critical to use the recommended oil viscosity in 5.7L engines that use MDS.
Deactivation occurs during the compression stroke of each cylinder, after air and fuel enter the cylinder. Ignition then occurs, but the combustion products remain trapped in the cylinder under high pressure, because the valves no longer open. No air enters or leaves. During subsequent piston strokes, this high-pressure gas is repeatedly compressed and expanded like an air spring, but fuel is not injected.
Scheme 376
Scheme 376: ELEMENT-AIR CLEANER
Scheme 377
- Pull the air inlet hose straight (1) upward to disengage it from the grommet located on the top of the radiator fan shroud (2).
- Disengage the three retaining clamps (3) that secure the air cleaner housing cover (4) to air cleaner housing (6).
- Lift and pull the air cleaner housing cover toward the engine to disengage the cover locating tabs (5) from the air cleaner housing and position the cover out of the way.
- Remove the air cleaner element (1) from the inside of the air cleaner housing (2).
