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Engine Cooling System: Removal & Installation Buick LaCrosse II facelift

Cooling System (Mechanical) 15 illustrations ~1353 words

Removal Procedure

  1. Remove the front exhaust pipe. Refer to «Exhaust Front Pipe Replacement (LFX)»(ref-621998-S10816745552014061000000) , «Exhaust Front Pipe Replacement (LUK)»(ref-621998-S08510141632014061000000) .
  2. Remove the catalytic converter. Refer to «Catalytic Converter Replacement (LUK)»(ref-621998-S05066882492014061000000) .
  3. Remove the intake manifold cover. Refer to «Intake Manifold Cover Replacement»(ref-621952-S40221416212014061000000) .
  4. Disconnect the power brake booster vacuum pipe (1).
  5. Detach the power brake booster vacuum pipe retainers (1).
  6. Disconnect the EVAP canister vacuum pipe connector (1).
  7. Remove the drive motor generator battery high voltage cable retainers (1) and reposition the high voltage cable (2).
  8. Remove the heater outlet bracket.
  9. Disconnect the camshaft position sensor and reposition the engine harness.
  10. Disconnect the following hoses: Heater coolant pump hose (1) Heater inlet hose (2) Radiator outlet hose (3) Surge tank hose (4)
  11. Disconnect the engine coolant temperature sensor (1).
  12. Remove the engine coolant thermostat housing fasteners (2).
  13. Discard the thermostat housing seal (4).
  14. Remove the engine coolant thermostat housing with the outlet pipe from the water pump.

Installation Procedure

  1. Clean the sealing surface.
  2. Install NEW seals to the water pump outlet pipe and thermostat housing inlet pipe.
  3. Install the engine coolant thermostat housing (2) to the engine block with a NEW seal (4).
  4. Install the 3 fasteners (3) to the thermostat housing and tighten to 10 N.m (89 lb in).
  5. Connect the electrical connector of the engine coolant temperature sensor (1).
  6. Install the following hoses to the thermostat housing: Heater coolant pump hose (1) Heater inlet hose (2) Radiator outlet hose (3) Surge tank hose (4)
  7. Attach the drive motor generator battery high voltage cable retainers (1) and reposition the high voltage cable (2).
  8. Install the heater outlet bracket.
  9. Connect the camshaft position sensor and reposition the engine harness.
  10. Connect the power brake booster vacuum pipe (1).
  11. Attach the power brake booster vacuum pipe retainers (1).
  12. Connect the EVAP canister vacuum pipe connector (1).
  13. Install the intake manifold cover. Refer to «Intake Manifold Cover Replacement»(ref-621952-S40221416212014061000000) .
  14. Install the catalytic converter. Refer to «Catalytic Converter Replacement (LUK)»(ref-621998-S05066882492014061000000) .
  15. Install the front exhaust pipe. Refer to «Exhaust Front Pipe Replacement (LFX)»(ref-621998-S10816745552014061000000) , «Exhaust Front Pipe Replacement (LUK)»(ref-621998-S08510141632014061000000) .

Scheme 1

Scheme 1: Engine Coolant Thermostat Housing Replacement (LFX)
Scheme 1: Engine Coolant Thermostat Housing Replacement (LFX)
CalloutComponent Name
Preliminary Procedures Remove the fuel injector pipe shield. Refer to Fuel Pipe Shield Replacement (LFW or LFX) , or Fuel Feed Pipe Replacement (With AWD at Tank) , Fuel Feed Pipe Replacement (LFW or LFX) . Reposition engine control module. Refer to Engine Control Module Replacement . Drain the cooling system. Refer to Cooling System Draining and Filling (Static Fill) , Cooling System Draining and Filling (GE 47716) . Remove the intake manifold cover. Refer to Intake Manifold Cover Replacement .
1Heater Outlet Hose
2Heater Inlet Hose
3Surge Tank Hose
4Radiator Outlet Hose
5Bolt (Qty: 3) CAUTION: Refer to Fastener Caution . Tighten 10 N.m (88 lb in)
6Engine Cooling Thermostat Housing Procedure Clean the engine block and thermostat gasket surfaces. Replace gasket and any worn hoses.
CAUTION
Refer to Fastener Caution .

Engine Coolant Thermostat Housing Replacement (LFX)

Scheme 2

Scheme 2: Engine Coolant Thermostat Replacement (V6)
Scheme 2: Engine Coolant Thermostat Replacement (V6)
CalloutComponent Name
Preliminary Procedure Remove the engine cooling thermostat housing. Refer to Engine Coolant Thermostat Housing Replacement (LUK) , Engine Coolant Thermostat Housing Replacement (LFX) .
1Bolt (Qty: 3) CAUTION: Refer to Fastener Caution . Tighten 10 N.m (88 lb in)
2Engine Cooling Thermostat Gasket
3Engine Cooling Thermostat Tip: Clean the engine block and thermostat gasket surfaces. Replace gasket and any worn hoses.
CAUTION
Refer to Fastener Caution .

Engine Coolant Thermostat Replacement (V6)

  1. Drain the cooling system. Refer to «Cooling System Draining and Filling (Static Fill)»(ref-621992-S19816140002014061000000) , «Cooling System Draining and Filling (GE 47716)»(ref-621992-S05335391822014061000000) .
  2. Reposition the engine control module.
  3. Remove the surge tank hose (1) and the radiator outlet hose (2), from the water inlet housing (3).
  4. Remove the water inlet fasteners (1) and remove the water inlet housing (2).
  5. Remove the engine coolant thermostat (3) and discard the seal (4).
  6. Carefully clean the water inlet sealing surfaces.
  1. Install the thermostat (3) with a NEW seal (4).
  2. Install the water inlet housing (2) and tighten the fasteners (1) to 10 N.m (89 lb in).
  3. Install the radiator outlet hose (2) and the surge tank hose (1).
  4. Reposition the engine control module on the battery tray.
  5. Fill the cooling system. Refer to «Cooling System Draining and Filling (Static Fill)»(ref-621992-S19816140002014061000000) , «Cooling System Draining and Filling (GE 47716)»(ref-621992-S05335391822014061000000) .

Scheme 3

Scheme 3: Engine Coolant Air Bleed Pipe Replacement (V6)
Scheme 3: Engine Coolant Air Bleed Pipe Replacement (V6)
CalloutComponent Name
Preliminary Procedures Partially drain coolant system. Remove the intake manifold cover. Refer to Intake Manifold Cover Replacement . Remove the air cleaner. Refer to Air Cleaner Assembly Replacement (LFW or LFX) . Remove power steering fluid reservoir. Refer to Power Steering Fluid Reservoir Replacement .
1Radiator Surge Tank Inlet Hose Clamp Procedure Reposition radiator surge tank inlet hose clamp using the BO-38185 Hose Clamp Pliers . NOTE: Replace hose clamps if necessary. Special Tools BO-38185 Hose Clamp Pliers For equivalent regional tools, refer to Special Tools .
2Engine Coolant Air Bleed Pipe Fastener (Qty 2) CAUTION: Refer to Fastener Caution . Tighten 10 (88 lb in)
3Engine Coolant Air Bleed Pipe
NOTE
Replace hose clamps if necessary.
CAUTION
Refer to Fastener Caution .

Engine Coolant Air Bleed Pipe Replacement (V6)

Scheme 4

Scheme 4: Water Outlet Replacement (V6)
Scheme 4: Water Outlet Replacement (V6)
CalloutComponent Name
Preliminary Procedure Remove the right engine mount bracket. Refer to Engine Mount Bracket Replacement - Right Side Drain the cooling system. Refer to Cooling System Draining and Filling (Static Fill) , Cooling System Draining and Filling (GE 47716) . Remove the air cleaner. Refer to Air Cleaner Assembly Replacement (LFW or LFX) . Remove the engine coolant air bleed pipe.Refer to Engine Coolant Air Bleed Pipe Replacement (V6) Remove the power steering fluid reservoir bracket.Refer to Power Steering Fluid Reservoir Bracket Replacement Remove radiator inlet hose. Refer to Radiator Inlet Hose Replacement (LUK) , Radiator Inlet Hose Replacement (LFX)
1Bolt (Qty: 2) CAUTION: Refer to Fastener Caution . Tighten 10Y (88 lb in)
2Seal
3Water Outlet TIP: Clean the surfaces and replace the seal.
CAUTION
Refer to Fastener Caution .

Water Outlet Replacement (V6)

  1. Remove the air cleaner assembly. Refer to «Air Cleaner Assembly Replacement»(ref-621990-S12781849762014061000000) .
  2. Remove the intake manifold cover. Refer to «Intake Manifold Cover Replacement»(ref-621952-S40221416212014061000000) .
  3. Remove the exhaust manifold heat shield. Refer to «Exhaust Manifold Heat Shield Replacement (LUK)»(ref-621998-S00469937962014061000000) .
  4. If equipped, remove the coolant heater.
  5. Remove the catalytic converter. Refer to «Catalytic Converter Replacement (LUK)»(ref-621998-S05066882492014061000000) .
  6. Remove the engine coolant thermostat housing. Refer to «Engine Coolant Thermostat Housing Replacement (LUK)»(ref-621992-S28680955482014061000000) , «Engine Coolant Thermostat Housing Replacement (LFX)»(ref-621992-S41678109592014061000000) .
  7. Remove the water pump cover (2), fasteners (3) and gasket (1) from the engine front cover.
  8. Drain the coolant from the water pump using the plug at the bottom of the pump. Install the plug when finished.
  9. Align the EN-43651 water pump holding tool (1) with the threads on the water pump sprocket. Tighten the water pump holding tool fasteners (2).
  10. Secure the water pump holding tool with the previously removed water pump cover fasteners (1) into the engine front cover.
  11. Remove the water pump sprocket to water pump fasteners (1).
  12. Remove the front water pump fasteners (1).
  13. Remove the rear water pump fasteners (1).
  14. Remove the water pump (1).
  15. If replacing the water pump cover remove the water pump rear cover fasteners (4).
  16. Separate the water pump cover (1) from the water pump (3).
  17. Remove and discard the water pump O-ring seal (2).
  1. If replacing the water pump cover (1), install a new O-ring (2) to the water pump (3) and tighten the fasteners (4) to 25 N.m (18 lb ft).
  2. Using a guide pin (2), align the pin with the water pump holding tool.
  3. Position the water pump (1) against the engine block and hand tighten the water pump fasteners (3).
  4. Install 2 water pump sprocket to water pump fasteners (1). After the fasteners are snug, remove the guide pin (2) and install the 3rd fastener (3) and tighten to 10 N.m (89 lb in).
  5. Install the water pump fasteners (1) at the front of the engine. Hand tighten at this time.
  6. Tighten the water pump fasteners at the front and rear of the water pump to 25 N.m (18 lb ft).
  7. Remove the water pump cover fasteners (1) from the engine front cover and water pump holding tool.
  8. Remove the EN-43651 water pump holding tool (1) from the water pump sprocket.
  9. Install the water pump access plate (2) gasket (1) and fasteners (3) and tighten to 10 N.m (89 lb in).
  10. If equipped, Install the coolant heater.
  11. Install the engine coolant thermostat housing. Refer to «Engine Coolant Thermostat Housing Replacement (LUK)»(ref-621992-S28680955482014061000000) , «Engine Coolant Thermostat Housing Replacement (LFX)»(ref-621992-S41678109592014061000000) .
  12. Install the catalytic converter. Refer to «Catalytic Converter Replacement (LUK)»(ref-621998-S05066882492014061000000) .
  13. Install the exhaust manifold heat shield. Refer to «Exhaust Manifold Heat Shield Replacement (LUK)»(ref-621998-S00469937962014061000000) .
  14. Install the intake manifold cover. Refer to «Intake Manifold Cover Replacement»(ref-621952-S40221416212014061000000) .
  15. Install the air cleaner assembly. Refer to «Air Cleaner Assembly Replacement»(ref-621990-S12781849762014061000000) .
  16. Refill the coolant system. Refer to «Cooling System Draining and Filling (Static Fill)»(ref-621992-S19816140002014061000000) , «Cooling System Draining and Filling (GE 47716)»(ref-621992-S05335391822014061000000) .
  1. Drain the cooling system. Refer to «Cooling System Draining and Filling (Static Fill)»(ref-621992-S19816140002014061000000) , «Cooling System Draining and Filling (GE 47716)»(ref-621992-S05335391822014061000000) .
  2. Remove the generator drive belt. Refer to «Drive Belt Replacement»(ref-621997-S37121974752014061000000) .
  3. Use the EN 46104 water pump pulley holder (1) to retain the pulley.
  4. Remove the water pump pulley bolts and DISCARD the bolts.
  5. Remove the water pump pulley.
  6. Remove the water pump bolts and DISCARD the bolts.
  7. Remove the water pump.
  8. Remove and DISCARD the water pump seal.
  9. Carefully clean the water pump sealing surfaces.
  1. Install a NEW water pump seal.
  2. Install the water pump.
  3. Install the NEW water pump bolts and hand tighten the water pump bolts.
  4. Tighten the water pump bolts in sequence. On the initial pass, tighten the bolts in sequence to 10 (89 lb in). On the second pass, tighten the bolts in sequence to 10 (89 lb in). On the final pass, tighten the bolts in sequence shown an additional 45 degrees.
  5. Install the water pump pulley and the NEW water pump pulley bolts.
  6. Use the EN 46104 water pump pulley holder (1) to hold the pulley.
  7. Install the water pump pulley bolts and tighten to 12 (108 lb in).
  8. Install the generator drive belt. Refer to «Drive Belt Replacement»(ref-621997-S37121974752014061000000) .
  9. Fill the cooling system. Refer to «Cooling System Draining and Filling (Static Fill)»(ref-621992-S19816140002014061000000) , «Cooling System Draining and Filling (GE 47716)»(ref-621992-S05335391822014061000000) .

Scheme 5

Scheme 5: Auxiliary Water Pump Replacement (LUK)
Scheme 5: Auxiliary Water Pump Replacement (LUK)
CalloutComponent Name
Preliminary Procedures Drain the cooling system. Refer to Cooling System Draining and Filling (Static Fill) , Cooling System Draining and Filling (GE 47716) . Remove intake manifold cover. Refer to Intake Manifold Cover Replacement . Remove auxiliary heater outlet hose. Refer to Auxiliary Heater Outlet Hose Replacement . Remove heater coolant pump hose. Refer to Heater Coolant Pump Hose Replacement .
1Auxiliary Water Pump Fastener (Qty: 3) CAUTION: Refer to Fastener Caution .
2Auxiliary Water Pump
CAUTION
Refer to Fastener Caution .

Auxiliary Water Pump Replacement (LUK)

Scheme 6

Scheme 6: Radiator Drain Cock Replacement
Scheme 6: Radiator Drain Cock Replacement
CalloutComponent Name
Preliminary Procedures Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle . Place a drain pan under the right side of the radiator.
1Radiator Drain Cock Procedure Fill coolant to the proper level. Refer to Cooling System Draining and Filling (Static Fill) , Cooling System Draining and Filling (GE 47716) .

Radiator Drain Cock Replacement

Engine Coolant Fan Shroud Replacement

CalloutComponent Name
Preliminary Procedures Remove the air cleaner outlet duct. Refer to Air Cleaner Outlet Duct Replacement Reposition power steering reservoir. Remove the radiator outlet hose. Refer to Radiator Outlet Hose Replacement (LUK) , Radiator Outlet Hose Replacement (LFX) Disconnect the engine coolant fan motor electrical connectors. Unclip all wiring harness that are connected to the shroud.
1Engine Coolant Fan Shroud Bolts (Qty 2) CAUTION: Refer to Fastener Caution . Tighten 10 N.m (88 lb in)
2Engine Coolant Fan Shroud
CAUTION
Refer to Fastener Caution .

Engine Coolant Fan Shroud Replacement

Scheme 7

Scheme 7: Radiator Replacement (LFX, LUK)
Scheme 7: Radiator Replacement (LFX, LUK)
CalloutComponent Name
Preliminary Procedures Drain the cooling system. Refer to Cooling System Draining and Filling (Static Fill) , Cooling System Draining and Filling (GE 47716) . Remove auxiliary radiator. Refer to Auxiliary Radiator Replacement Remove the radiator inlet hose. Refer to Radiator Inlet Hose Replacement (LUK) , Radiator Inlet Hose Replacement (LFX) . Remove the radiator outlet hose. Refer to Radiator Outlet Hose Replacement (LUK) , Radiator Outlet Hose Replacement (LFX) . Remove transmission oil cooler lines. Refer to Transmission Fluid Cooler Inlet Pipe Replacement , and Transmission Fluid Cooler Outlet Pipe Replacement . Disconnect the engine coolant fan harness electrical connectors. Remove the radiator support brackets. Refer to Radiator Support Bracket Replacement .
1Radiator Procedure Release the 2 condenser assembly retainers. Remove the engine coolant fan shroud from the radiator. Refer to Engine Coolant Fan Shroud Replacement .

Radiator Replacement (LFX, LUK)

Scheme 8

Scheme 8: Radiator Support Bracket Replacement
Scheme 8: Radiator Support Bracket Replacement
CalloutComponent Name
Preliminary Procedures Remove the front bumper fascia. Refer to Front Bumper Fascia Replacement Support the radiator.
1Radiator Support Bracket Fastener (Qty: 4) CAUTION: Refer to Fastener Caution . Tighten 25 N.m (18 lb ft)
2Radiator Support Bracket (Qty: 2)
CAUTION
Refer to Fastener Caution .

Radiator Support Bracket Replacement

Scheme 9

Scheme 9: Radiator Air Side Baffle and Deflector Replacement (Left)
Scheme 9: Radiator Air Side Baffle and Deflector Replacement (Left)
CalloutComponent Name
Preliminary Procedures Remove the front fascia. Refer to Front Bumper Fascia Replacement
1Radiator Air Side Baffel and Deflector Retainers (Qty 3)
2Radiator Air Side Baffel and Deflector

Radiator Air Side Baffle and Deflector Replacement (Left)

Scheme 10

Scheme 10: Radiator Air Side Baffle and Deflector Replacement (Right)
Scheme 10: Radiator Air Side Baffle and Deflector Replacement (Right)
CalloutComponent Name
Preliminary Procedures Remove the front fascia. Refer to Front Bumper Fascia Replacement . Reposition the front air intake duct deflector to access the side baffle fastener. Refer to Front Intake Air Duct Deflector Replacement .
1Radiator Air Side Baffle and Deflector Retainer (Qty: 3)
2Radiator Air Side Baffle and Deflector

Radiator Air Side Baffle and Deflector Replacement (Right)

Scheme 11

Scheme 11: Radiator Air Upper Baffle and Deflector Replacement
Scheme 11: Radiator Air Upper Baffle and Deflector Replacement
CalloutComponent Name
Preliminary Procedures Remove the front fascia. Refer to Front Bumper Fascia Replacement . Remove the front intake air duct. Refer to Front Intake Air Duct Deflector Replacement .
1Radiator Air Upper Baffle and Deflector Retainer (Qty: 4)
2Radiator Air Upper Baffle and Deflector

Radiator Air Upper Baffle and Deflector Replacement

Scheme 12

Scheme 12: Engine Coolant Heater Replacement (LUK)
Scheme 12: Engine Coolant Heater Replacement (LUK)
CalloutComponent Name
Preliminary Procedures Remove the intake manifold cover. Refer to Intake Manifold Cover Replacement . Remove the exhaust manifold heat shield. Refer to Exhaust Manifold Heat Shield Replacement (LUK) . Disconnect the coolant heater cord.
1Engine Coolant Heater Fastener CAUTION: Refer to Fastener Caution . Tighten 15 N.m (11 lb ft)
2Engine Coolant Heater
CAUTION
Refer to Fastener Caution .

Engine Coolant Heater Replacement (LUK)

Scheme 13

Scheme 13: Engine Coolant Heater Replacement
Scheme 13: Engine Coolant Heater Replacement
CalloutComponent Name
Preliminary Procedure Remove the drivetrain and front suspension frame. Refer to Drivetrain and Front Suspension Frame Replacement .
1Coolant Heater NOTE: Be careful not to score inner surface of the engine block when removing coolant heater.
NOTE
Be careful not to score inner surface of the engine block when removing coolant heater.

Engine Coolant Heater Replacement (LFW)

Scheme 14

Scheme 14: Coolant Heater Cord Replacement (LUK)
Scheme 14: Coolant Heater Cord Replacement (LUK)
CalloutComponent Name
1Coolant Heater Connector
2Coolant Heater Cord

Coolant Heater Cord Replacement (LUK)

Scheme 15

Scheme 15: Coolant Heater Cord Replacement (LFX)
Scheme 15: Coolant Heater Cord Replacement (LFX)
CalloutComponent Name
Preliminary Procedure Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
1Retainer
2Coolant Heater Cord

Coolant Heater Cord Replacement (LFW)

More articles — Engine Cooling System