Exhaust Manifold - LH
Exhaust Manifold - LHMaterial:
NOTE: 4.6L shown, 5.4L similar.
Removal
All engines
1. With the vehicle in NEUTRAL, position it on a hoist. For additional information, refer to Maintenance/Service and Repair.
Romeo engine (4.6L)
2. Disconnect the upper and lower fitting and remove the exhaust gas recirculation (EGR) system module-to-exhaust manifold tube.
Windsor engine (5.4L)
3. Disconnect the differential pressure feedback EGR sensor hoses from the EGR valve-to-exhaust manifold tube.
4. Disconnect the upper and lower fittings and remove the EGR valve-to-exhaust manifold tube.
All engines
5. Remove the 2 exhaust Y-pipe flange nuts.
6. Remove the 8 nuts and the exhaust manifold.
7. Remove and discard the exhaust manifold gasket.
^ Clean the sealing surfaces with metal surface prep. Follow the directions on the packaging.
8. Clean and inspect the exhaust manifold.
Installation
All engines
1. NOTE: Install a new exhaust manifold gasket.
Position the gaskets and the LH exhaust manifold and tighten the 8 nuts in the sequence shown.
^ Tighten to 25 Nm (18 ft. lbs.).
2. Position the Y-pipe flange and install the 2 nuts.
^ Tighten to 40 Nm (30 ft. lbs.).
Windsor engine (5.4L)
3. Install the EGR valve-to-exhaust manifold tube and tighten the upper and lower fittings in 2 stages.
^ Stage 1: Hand-tighten the fittings.
^ Stage 2: Tighten the lower fitting to 50 Nm (37 ft. lbs.).
4. Connect the differential pressure feedback EGR sensor hoses to the EGR valve-to-exhaust manifold tube.
Romeo engine (4.6L)
5. Install the EGR system module-to-exhaust manifold tube and tighten the upper and lower fittings in 2 stages.
^ Stage 1: Connect the upper and lower fittings and hand-tighten.
^ Stage 2: Tighten to 40 Nm (30 ft. lbs.).