303-01C Engine - 3.5L EcoBoost (272kW/370PS) Removal and Installation
Procedure for Intake Manifold
Model: 2018 F-150
Procedure Revision Date: 08/30/2016
Removal
Disconnect the battery ground cable.
Refer to: Battery Disconnect and Connect (414-01 Battery, Mounting and Cables, General Procedures).
Remove the engine appearance cover retainers, release the engine appearance cover from the rear retainers, and then remove the engine appearance cover.
Image Description: The engine appearance cover, highlighted in blue, is shown secured to the engine. Two mounting points are indicated with "x2".
Remove the air cleaner outlet pipe.
Refer to: Air Cleaner Outlet Pipe (303-12C Intake Air Distribution and Filtering - 3.5L EcoBoost (272kW/370PS), Removal and Installation).
Loosen the clamp and position the throttle body intake pipe aside.
Image Description: A yellow intake pipe connected to the throttle body. A clamp securing the pipe is visible.
Disconnect the throttle body electrical connector and wiring harness retainer.
Image Description: A close-up view of the throttle body. A yellow electrical connector and a purple retainer are shown. An arrow indicates the direction of disconnection for the retainer.
Remove the PCV tube.
Refer to: Quick Release Coupling (310-00 Fuel System - General Information - 3.5L EcoBoost (272kW/370PS)).
Image Description: A blue PCV tube connected to the engine. A purple quick-connect fitting is visible.
Disconnect the wire harness retainers from the intake manifold.
Image Description: Multiple wire harnesses attached to the intake manifold. Purple retainers are shown, with arrows indicating disconnection points.
Disconnect the fuel vapor tube to the intake manifold.
Refer to: Quick Release Coupling (310-00 Fuel System - General Information - 3.5L EcoBoost (272kW/370PS)).
Disconnect the vacuum hose.
Image Description: A yellow fuel vapor tube connected to the intake manifold with purple quick-connect fittings. Four mounting points are indicated with "x4".
Disconnect the hose couplings at the turbocharger inlet tube.
Refer to: Quick Release Coupling (310-00 Fuel System - General Information - 3.5L EcoBoost (272kW/370PS)).
Image Description: Yellow hoses connected to the turbocharger inlet tube. Purple quick-connect fittings are shown.
Disconnect the MAPT electrical connector.
Image Description: A yellow wire harness connected to a component labeled MAPT. Two mounting points are indicated with "x2".
Disconnect the EVAP purge solenoid electrical connector and quick connect coupling.
Refer to: Quick Release Coupling (310-00 Fuel System - General Information - 3.5L EcoBoost (272kW/370PS)).
Lift the EVAP purge valve off of the intake manifold mounting tab.
Image Description: Yellow hoses and electrical connectors attached to the EVAP purge solenoid. Arrows indicate disconnection points.
Remove the bolts and the intake manifold.
Image Description: The intake manifold is shown attached to the engine. Eight (x8) bolts are highlighted in pink, indicating removal points.
Remove and discard the intake manifold gaskets.
Clean and inspect all of the sealing surfaces of the cylinder heads and the intake manifold.
Image Description: The removed intake manifold is shown with six (x6) gasket locations highlighted. A cleaning tool is depicted.
Installation
Install the new intake manifold gaskets.
Image Description: The intake manifold is shown with six (x6) new gaskets installed.
NOTICE: If the engine is repaired or replaced because of upper engine failure, typically including valve or piston damage, check the intake manifold for metal debris. If metal debris is found, install a new intake manifold. Failure to follow these instructions can result in engine damage.
Install the intake manifold and the bolts.
Torque:
Stage 1: 89 lb.in (10 Nm)
Stage 2: 45°
Image Description: The intake manifold is installed on the engine. Eight (8) bolts are numbered 1 through 8, indicating the tightening sequence.
Slide the EVAP purge valve onto the intake manifold mounting tab.
Connect the EVAP purge solenoid electrical connector and quick connect coupling.
Refer to: Quick Release Coupling (310-00 Fuel System - General Information - 3.5L EcoBoost (272kW/370PS)).
Connect the MAPT electrical connector.
Connect the quick connect couplings at the turbocharger inlet tube.
Refer to: Quick Release Coupling (310-00 Fuel System - General Information - 3.5L EcoBoost (272kW/370PS)).
Image Description: Yellow hoses connected to the turbocharger inlet tube with purple quick-connect fittings. Two (x2) connections are shown.
Connect the fuel vapor tube to the intake manifold.
Refer to: Quick Release Coupling (310-00 Fuel System - General Information - 3.5L EcoBoost (272kW/370PS)).
Install the vacuum hose.
Image Description: Yellow fuel vapor tube connected to the intake manifold with purple quick-connect fittings. Four (x4) connections are shown.
Connect the wire harness retainers to the intake manifold.
Image Description: Wire harnesses connected to the intake manifold with purple retainers.
Install the PCV tube.
Refer to: Quick Release Coupling (310-00 Fuel System - General Information - 3.5L EcoBoost (272kW/370PS)).
Image Description: Blue PCV tube connected to the engine with a purple connector.
Connect the throttle body electrical connector and wiring harness retainer.
Image Description: Yellow electrical connector and purple retainer connected to the throttle body.
Position back the throttle body intake pipe and tighten the clamp.
Torque: 44 lb.in (5 Nm)
Image Description: Yellow intake pipe connected to the throttle body. A clamp is shown.
Install the air cleaner outlet pipe.
Refer to: Air Cleaner Outlet Pipe (303-12C Intake Air Distribution and Filtering - 3.5L EcoBoost (272kW/370PS), Removal and Installation).
Slide the engine appearance cover into the retaining bracket and install the retainers.
Torque: 97 lb.in (11 Nm)
Image Description: Blue engine appearance cover installed on the engine. Two mounting points are indicated with "x2".
Connect the battery ground cable.
Refer to: Battery Disconnect and Connect (414-01 Battery, Mounting and Cables, General Procedures).
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