Buick Encore Owners & Service Manuals

Buick Encore: Intake manifold replacement

Intake manifold replacement - Removal Procedure

  1. Disconnect the battery negative cable. Refer to Battery Negative Cable Disconnection and Connection .
  2. Remove the engine cover. Refer to Engine Cover Replacement.
  3. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .

Fig. 31: Heater Outlet Hose And ECM Wiring Harness Retainer Clips
Fig. 31: Heater Outlet Hose And ECM Wiring Harness Retainer Clips

  1. Unclip the heater outlet hose from retainer clip (1).
  2. Unclip the engine control module wiring harness from 2 retainer clips (2).
  3. Lower the vehicle.
  4. Remove the charge air cooler outlet air hose from the throttle body. Refer to Charge Air Cooler Outlet Air Hose Replacement .

Fig. 32: Throttle Body Wiring Harness Plug
Fig. 32: Throttle Body Wiring Harness Plug

  1. Disconnect the throttle body wiring harness plug (1).

Fig. 33: PCV Hose And Wiring Harness Plugs
Fig. 33: PCV Hose And Wiring Harness Plugs

  1. Disconnect the evaporative emission canister purge solenoid valve wiring harness plug (2).
  2. Disconnect the manifold absolute pressure sensor wiring harness plug (1).
  3.  Disconnect the 4 fuel injector wiring harness plugs (4).
  4. Unclip the engine control module wiring harness from the camshaft cover.
  5.  Disconnect the PCV hose (3).

Fig. 34: Turbocharger Wastegate Regulator Solenoid Valve Wiring Harness Plug, Intake Manifold And Fuel Injection Rail Retainer Clips
Fig. 34: Turbocharger Wastegate Regulator Solenoid Valve Wiring Harness Plug, Intake Manifold And Fuel Injection Rail Retainer Clips

  1. Disconnect the turbocharger wastegate regulator solenoid valve wiring harness plug (3).
  2. Unclip the engine control module wiring harness from 2 intake manifold retainer clips (2) and from 2 fuel injection rail retainer clips (1).
  3. Relieve the fuel system pressure. Refer to Fuel Pressure Relief

Fig. 35: Fuel Feed Pipe And Fuel Injector Rail
Fig. 35: Fuel Feed Pipe And Fuel Injector Rail

  1. Remove the fuel feed pipe (4) from fuel injector rail.
  2. Unclip the fuel feed pipe from retainer clip (1).
  3. Remove the fuel ventilation pipe (2) from evaporative emission canister purge solenoid valve.
  4. Unclip the fuel ventilation pipe from retainer clip (1).
  5. Close the vents with closure plugs.
  6.  Disconnect the brake booster vacuum pipe (3) from the intake manifold.

Fig. 36: Intake Manifold Bolts
Fig. 36: Intake Manifold Bolts

NOTE: The intake manifold bolts remain in intake manifold.

  1. Remove the 6 intake manifold bolts (1).

Fig. 37: Intake Manifold
Fig. 37: Intake Manifold

  1. Remove the intake manifold (1) and the intake manifold gasket.
  2.  Transfer parts from intake manifold as necessary. Refer to Intake Manifold Disassemble, and Intake Manifold Assemble.

Intake manifold replacement - Installation Procedure

  1. Clean the sealing surfaces.

Fig. 38: Intake Manifold
Fig. 38: Intake Manifold

  1. Install the intake manifold (1) along with a NEW intake manifold gasket.

Fig. 39: Intake Manifold Bolts
Fig. 39: Intake Manifold Bolts

CAUTION: Refer to Fastener Caution .

  1. Install the 6 intake manifold bolts (1) and tighten to 20 (15 lb ft).

Fig. 40: Fuel Feed Pipe And Fuel Injector Rail
Fig. 40: Fuel Feed Pipe And Fuel Injector Rail

  1. Connect the fuel ventilation pipe (2) to the evaporative emission canister purge solenoid valve.
  2. Clip in the fuel ventilation pipe to the retainer clip (1).
  3. Connect the fuel feed pipe (4) to the injector rail.
  4. Clip in the fuel feed pipe to the retainer clip (1).
  5. Connect the brake booster vacuum pipe (3) to the intake manifold.

Fig. 41: Turbocharger Wastegate Regulator Solenoid Valve Wiring Harness Plug, Intake Manifold And Fuel Injection Rail Retainer Clips
Fig. 41: Turbocharger Wastegate Regulator Solenoid Valve Wiring Harness Plug, Intake Manifold And Fuel Injection Rail Retainer Clips

  1. Connect the turbocharger wastegate regulator solenoid valve wiring harness plug (3).
  2. Clip in the engine control module wiring harness to 2 intake manifold retainer clips (2) and from 2 fuel injection rail retainer clips (1).

Fig. 42: PCV Hose And Wiring Harness Plugs
Fig. 42: PCV Hose And Wiring Harness Plugs

  1. Clip in the engine control module wiring harness to the camshaft cover.
  2.  Connect the 4 fuel injector wiring harness plugs (4).
  3. Connect the manifold absolute pressure sensor wiring harness plug (1) .
  4. Connect the evaporative emission canister purge solenoid valve wiring harness plug (2).
  5. Connect the PCV hose (3).

Fig. 43: Throttle Body Wiring Harness Plug
Fig. 43: Throttle Body Wiring Harness Plug

  1. Connect the throttle body wiring harness plug (1).
  2. Install the charge air cooler outlet air hose to the throttle body. Refer to Charge Air Cooler Outlet Air Hose Replacement .

Fig. 44: Heater Outlet Hose And ECM Wiring Harness Retainer Clips
Fig. 44: Heater Outlet Hose And ECM Wiring Harness Retainer Clips

  1. Clip in the heater outlet hose to retainer clip (1).
  2. Clip in the engine control module wiring harness to 2 retainer clips (2).
  3. Lower the vehicle.
  4. Install the engine cover. Refer to Engine Cover Replacement.
  5. Connect the battery negative cable. Refer to Battery Negative Cable Disconnection and Connection .

CAMSHAFT TIMING CHAIN REPLACEMENT

Special Tools

EN-955 Locking Pin

For equivalent regional tools. Refer to Special Tools.

Removal Procedure

  1. Remove the engine front cover. Refer to Engine Front Cover with Oil Pump Replacement.

Fig. 45: Timing Chain And Timing Chain Tensioner
Fig. 45: Timing Chain And Timing Chain Tensioner

NOTE: If EN-955 fixing pin can not be inserted, compress the timing chain tensioner further with the aid of a flat bladed tool to allow complete insertion of the pin.

  1. Push the timing chain (2) in direction to the timing chain tensioner (1) and install the EN-955 pin (3).

Fig. 46: Upper Timing Chain Guide And Bolts
Fig. 46: Upper Timing Chain Guide And Bolts

  1. Remove the two upper timing chain guide bolts (1).
  2. Remove the upper timing chain guide (2).

Fig. 47: Timing Chain Guide Right Side
Fig. 47: Timing Chain Guide Right Side

  1. Remove the two timing chain guide right side bolts (2).
  2. Remove the timing chain guide right side (1).

Fig. 48: Timing Chain Tensioner Shoe And Bolt
Fig. 48: Timing Chain Tensioner Shoe And Bolt

  1. Remove the timing chain tensioner shoe bolt (2).
  2. Remove the timing chain tensioner shoe (1).

Fig. 49: Timing Chain And Crankshaft Sprocket
Fig. 49: Timing Chain And Crankshaft Sprocket

  1. Remove the timing chain (1) and crankshaft sprocket (2) together as a unit.

Fig. 50: Engine Front Cover Gasket
Fig. 50: Engine Front Cover Gasket

  1. Remove the engine front cover gasket (1).

Installation Procedure

  1. Clean the engine front cover sealing surfaces on engine block and cylinder head.

Fig. 51: Sealing Compound Application Areas
Fig. 51: Sealing Compound Application Areas

  1. Apply a 2 mm (0.0787 in) bead of RTV sealant the areas shown above (1, 2).

Fig. 52: Engine Front Cover Gasket
Fig. 52: Engine Front Cover Gasket

  1. Install the engine front cover gasket (1).

Fig. 53: Upper Timing Chain Guide And Bolts
Fig. 53: Upper Timing Chain Guide And Bolts

  1. Install the two upper timing chain guide bolts (1) and tighten to 8 N-m (71 lb in).
  2. Install the upper timing chain guide (2).

Fig. 54: Timing Chain And Crankshaft Sprocket
Fig. 54: Timing Chain And Crankshaft Sprocket

  1. Install the timing chain (1) and crankshaft sprocket (2) together as a unit.

Fig. 55: Timing Chain Tensioner Shoe And Bolt
Fig. 55: Timing Chain Tensioner Shoe And Bolt

  1. Install the timing chain tensioner shoe (1).

CAUTION: Refer to Fastener Caution .

  1. Install the timing chain tensioner shoe bolt (2) and tighten to 20 N.m (15 lb ft).

Fig. 56: Timing Chain Guide Right Side
Fig. 56: Timing Chain Guide Right Side

  1. Install the timing chain guide right side (1).
  2. Install the timing chain guide right side bolts (2) and tighten to 8 N.m (71 lb in).

Fig. 57: Timing Chain And Timing Chain Tensioner
Fig. 57: Timing Chain And Timing Chain Tensioner

  1. Push the timing chain (2) in direction of the timing chain tensioner (1) and remove EN-955 pin (3).
  2. Install the engine front cover. Refer to Engine Front Cover with Oil Pump Replacement.

TIMING CHAIN TENSIONER REPLACEMENT

Fig. 58: Timing Chain Tensioner
Fig. 58: Timing Chain Tensioner

Timing Chain Tensioner Replacement

Timing Chain Tensioner Replacement

Timing Chain Tensioner Replacement

HYDRAULIC VALVE LASH ADJUSTER ARM REPLACEMENT

Fig. 59: Hydraulic Valve Lash Adjuster Arms
Fig. 59: Hydraulic Valve Lash Adjuster Arms

Hydraulic Valve Lash Adjuster Arm Replacement

Hydraulic Valve Lash Adjuster Arm Replacement

HYDRAULIC VALVE LASH ADJUSTER REPLACEMENT

Fig. 60: Hydraulic Valve Lash Adjuster
Fig. 60: Hydraulic Valve Lash Adjuster

Hydraulic Valve Lash Adjuster Replacement

Hydraulic Valve Lash Adjuster Replacement

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