Engine removal

Tiny
LESTERANDSARAH
  • MEMBER
  • 2003 CHEVROLET SILVERADO
V8 5.3 liter four wheel drive automatic 150,000 miles.

What is the preferred or best way to remove the engine from this vehicle? The head gaskets have leaked and damaged the engine. I have a replacement, but, now need to remove the engine. Do I remove the transmission with the engine? Does it lift out or do I have to remove the radiator and grill etc.

Thanks in advance.
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Friday, September 17th, 2010 AT 7:35 PM

3 Replies

Tiny
DAVE H
  • EXPERT
Hello. Thanks for the donation much appreciated.

Let me know if you need any diagrams listed or assistance along the way.

Removal Procedure:
Open the hood.
Place fender covers over both fenders.
Raise the hood to the service position, perform the following:
Fig. 309: Removing Hood Hinge Bolts
Courtesy of GENERAL MOTORS CORP.
3.1. Remove the hood hinge bolts (1).
3.2. Raise the hood until vertical.
3.3. Install the hood hinge bolts until snug in the service position (2).
Remove the air conditioning (A/C) compressor. Refer to COMPRESSOR REPLACEMENT (L18) or COMPRESSOR REPLACEMENT (LR4, LM7, AND LQ4) or COMPRESSOR REPLACEMENT (LB7).
Remove the radiator support. Refer to RADIATOR SUPPORT REPLACEMENT.
Remove the engine sight shield. Refer to Engine Sight Shield Replacement (4.8L, 5.3L, and 6.0L Engines) or Engine Sight Shield Replacement (6.0L Engine w/RPOs Y91 and Z88).
Open the hose clamp and remove the radiator inlet hose from the water pump.
Fig. 310: Removing Radiator Inlet Hose
Courtesy of GENERAL MOTORS CORP.
Open the hose clamp and remove the radiator outlet hose from the water pump.
Remove the heater hoses. Refer to HEATER HOSE REPLACEMENT - INLET (L18) or HEATER HOSE REPLACEMENT - INLET (LB7) or HEATER HOSE REPLACEMENT - INLET (LR4, LM7, LQ4) or HEATER HOSE REPLACEMENT - INLET (LU3) and HEATER HOSE REPLACEMENT - OUTLET (L18) or HEATER HOSE REPLACEMENT - OUTLET (LB7) or HEATER HOSE REPLACEMENT - INLET (LR4, LM7, LQ4) or HEATER HOSE REPLACEMENT - OUTLET (LU3).
Fig. 311: Removing Radiator Outlet Hose
Courtesy of GENERAL MOTORS CORP.
Disconnect the following electrical connectors:
Evaporative emissions (EVAP) canister purge solenoid (1)
Generator (3)
Remove the harness bracket nut (2) in order to remove the engine harness from the intake manifold.
Fig. 312: EVAP Canister Purge Solenoid, Harness Bracket Nut & Generator
Courtesy of GENERAL MOTORS CORP.
Reposition the vent inlet hose clamp at the throttle body.
Remove the radiator vent inlet hose from the throttle body.
Fig. 313: Removing Radiator Vent Inlet Hose
Courtesy of GENERAL MOTORS CORP.
Remove the generator cable from the generator, perform the following:
14.1. Slide the boot down revealing the terminal stud.
14.2. Remove the generator cable nut from the terminal stud.
14.3. Remove the generator cable.
Fig. 314: Removing Generator Cable & Nut
Courtesy of GENERAL MOTORS CORP.
Disconnect the main coil harness (2) and fuel injector electrical connectors on the left side.
Fig. 315: Disconnect Main Coil Harness
Courtesy of GENERAL MOTORS CORP.
Disconnect the following electrical connectors:
Main coil harness (1)
Fuel injectors (2)
Electronic throttle control (ETC) (3)
Fig. 316: Main Coil Harness, Fuel Injectors & ETC Electrical Connectors
Courtesy of GENERAL MOTORS CORP.
Disconnect the manifold absolute pressure (MAP) sensor (1) and knock sensor (2) electrical connectors.
Fig. 317: Disconnect Manifold Absolute Pressure (MAP) Sensor & Knock Sensor Electrical Connectors
Courtesy of GENERAL MOTORS CORP.
Remove the harness ground bolt.
Reposition the harness ground and negative battery cable from the block.
Disconnect the following electrical connectors:
Engine coolant temperature (ECT) sensor (1)
Electronic variable orifice switch (2)
Fig. 318: Harness Ground Bolt, ECT Sensor & Electronic Variable Orifice Switch
Courtesy of GENERAL MOTORS CORP.
Remove the harness ground bolt at the right rear of the engine block.
Reposition the harness ground, and auxiliary negative battery cable, if equipped, from the block.
Remove the harness ground bolt at the left rear of the engine block.
Reposition the harness ground, and engine ground strap from the block.
Disconnect the following electrical connectors:
Oil pressure sensor (1)
Camshaft position (CMP) sensor (2)
Unclip all of the engine harness clips from the engine.
Fig. 319: Harness Ground Bolt, Oil Pressure Sensor & CMP Sensor
Courtesy of GENERAL MOTORS CORP.
Remove the battery cable junction block from the junction block bracket.
Fig. 320: Battery Cable Junction Bracket
Courtesy of GENERAL MOTORS CORP.
Remove the EVAP purge solenoid vent tube; perform the following:
Remove the EVAP tube end from the solenoid (1).
Remove the EVAP tube end from the vapor pipe (2).
Disconnect the fuel pipes. Refer to REMOVAL & INSTALLATION (METAL COLLAR).
Raise the vehicle.
Fig. 321: Solenoid & Vapor Pipe
Courtesy of GENERAL MOTORS CORP.
Disconnect the following electrical connectors:
Crankshaft position (CKP) sensor (1)
Engine oil sensor (6)
Coolant heater, if equipped.
Fig. 322: Disconnect Crankshaft Position (CKP) Sensor & Engine Oil Sensor
Courtesy of GENERAL MOTORS CORP.
Remove the battery cable channel bolt.
Slide the channel pin out of the oil pan tab.
Gather all branches of the engine wiring harness and reposition off to the side.
Lower the vehicle.
Fig. 323: Removing Battery Cable Channel Bolt
Courtesy of GENERAL MOTORS CORP.
Remove the rear power steering to engine block bolt.
Remove the generator bracket bolts.
Position the bracket aside.
Fig. 324: Removing Generator Bracket Bolts
Courtesy of GENERAL MOTORS CORP.
Remove the vacuum brake booster hose.
Remove the ignition coil(s) (as required) for the proper fit of the J 41798 before lifting the engine. Refer to REMOVAL (4.8L, 5.3L, 6.0L & 8.1L).
Fig. 325: Removing Vacuum Brake Booster Hose
Courtesy of GENERAL MOTORS CORP.
NOTE:Refer to FASTENER NOTICE.

Install the J 41798 to the cylinder heads.
Tighten
Tighten the M8 bolts to 25 N.M (18 lb ft).
Tighten the M10 bolts to 50 N.M (37 lb ft).
Fig. 326: Installing J 41798
Courtesy of GENERAL MOTORS CORP.
Remove the left and right engine mount to engine mount bracket bolts.
Raise the vehicle.
Fig. 327: Removing Left & Right Engine Mount To Engine Mount Bracket Bolts
Courtesy of GENERAL MOTORS CORP.
Remove the engine sight shield bolts and shield.
Fig. 328: Removing Engine Sight Shield & Bolts
Courtesy of GENERAL MOTORS CORP.
Remove the oil pan skid plate bolts and plate, if equipped.
Drain the engine oil.
Remove the starter motor. Refer to STARTER MOTOR.
Remove the catalytic converter.
Fig. 329: Removing Oil Pan Skid Plate & Bolts
Courtesy of GENERAL MOTORS CORP.
Remove the positive battery cable clip bolt and clip.
Fig. 330: Removing Positive Battery Cable Clip & Bolt
Courtesy of GENERAL MOTORS CORP.
Remove the torque converter bolts, if equipped.
Fig. 331: Removing Torque Converter Bolts
Courtesy of GENERAL MOTORS CORP.
Remove the transmission oil level indicator tube nut, if equipped.
Fig. 332: Removing Transmission Oil Level Indicator Tube Nut
Courtesy of GENERAL MOTORS CORP.
Remove the transmission oil level indicator tube, if equipped.
Fig. 333: Removing Transmission Oil Level Indicator Tube
Courtesy of GENERAL MOTORS CORP.
If equipped with a 4L60E transmission, remove the transmission bolt and stud on the right side.
Fig. 334: Removing Transmission Bolt & Stud On Right Side
Courtesy of GENERAL MOTORS CORP.
If equipped with a 4L80E transmission, remove the transmission converter cover bolts.
Fig. 335: Removing Transmission Converter Cover Bolts
Courtesy of GENERAL MOTORS CORP.
Remove the automatic transmission bolt/studs, if equipped.
Separate the engine from the automatic transmission, if equipped. Install the J 21366 to the transmission in order to hold the torque converter.
Fig. 336: Removing Automatic Transmission Bolt/Studs
Courtesy of GENERAL MOTORS CORP.
Using J 42371 remove the clutch line from the concentric slave cylinder.
Fig. 337: Removing Clutch Line
Courtesy of GENERAL MOTORS CORP.
Remove the manual transmission stud on the right side of the transmission, if equipped.
Fig. 338: Removing M/T Stud On Right Side Of Transmission
Courtesy of GENERAL MOTORS CORP.
Remove the manual transmission bolt/studs, if equipped.
Separate the manual transmission from the engine, if equipped.
Fig. 339: Removing Manual Transmission Bolt/Studs
Courtesy of GENERAL MOTORS CORP.
Mark the flywheel and a clutch pressure plate lug for installation alignment.
Remove the clutch pressure plate bolts, if equipped.
Remove the clutch pressure plate and disc, if equipped.
Lower the vehicle.
Install an engine hoist to the J 41798.
Install a floor jack under the transmission for support.
NOTE:Use care while moving the engine assembly in order to avoid breaking the MAP sensor locating tabs. Broken MAP sensor tabs may result in decreased engine performance.

Remove the engine.
Install the engine to an engine stand.
Remove the engine hoist.
Fig. 340: Removing Clutch Pressure Plate & Bolts
Courtesy of GENERAL MOTORS CORP.
Remove the J 41798 from the engine.
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Saturday, September 18th, 2010 AT 4:32 AM
Tiny
LESTERANDSARAH
  • MEMBER
Thanks you Dave H. For the quick reply. Please supply the diagrams that you referred to to assist in the removal and to help boost our confidence. Don
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Saturday, September 18th, 2010 AT 5:38 AM
Tiny
DAVE H
  • EXPERT
There are around fifty diagrams listed above. Please supply information on which diagrams you require.
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Tuesday, September 21st, 2010 AT 4:57 AM

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