This procedure covers removal and replacement of the exhaust resonator on a 2011-2014 Ford F-150 3.5L EcoBoost 4WD, including disconnecting exhaust clamps and hangers.

Warnings

Tools required

Parts

• Exhaust resonator assembly × 1 — Use OEM specification
• Exhaust clamps (if damaged) × 2 — 2.5 inch or 3 inch depending on location
• Rubber exhaust hangers (if damaged) × 2 — Replace if torn or cracked

Preparation

1. Ensure engine and exhaust system are completely cold
2. Park vehicle on level ground and engage parking brake
3. Place wheel chocks behind rear wheels
4. Apply penetrating oil to all exhaust clamps and hanger bolts, allow to soak for 15-20 minutes
5. Raise vehicle using floor jack and support securely on jack stands at appropriate frame lift points
6. Verify vehicle stability before working underneath

Procedure

1. 1

   Locate the resonator assembly
   Position yourself under the vehicle midway between the transmission and rear axle. The resonator is the cylindrical component in the mid-section of the exhaust system, located between the catalytic converters and the muffler. On 4WD models, it will be positioned to the driver side of the driveshaft. Visually inspect all connection points and hangers to plan your approach.
2. 2

   Support the resonator
   Place a floor jack or suitable support under the resonator assembly to prevent it from falling when disconnected. Adjust height so the resonator is supported but not under tension. This step is critical as the resonator weighs approximately 15-20 pounds and is awkward to handle.
3. 3

   Disconnect the forward exhaust clamp
   Locate the band clamp connecting the resonator inlet to the intermediate pipe coming from the catalytic converters. Using a 15mm socket, loosen and remove the clamp nut and bolt. If the clamp is severely corroded, you may need to cut it off with a reciprocating saw or angle grinder. Inspect the clamp for damage and replace if necessary.
   Torque spec

   Exhaust Clamps55 Nm (41 lb-ft)
4. 4

   Disconnect the rear exhaust clamp
   Locate the band clamp connecting the resonator outlet to the pipe leading to the muffler. Using a 15mm socket, loosen and remove the clamp nut and bolt. Work the clamp off the pipes. You may need to twist or rotate the clamp to break any corrosion bond.
   Torque spec

   Exhaust Clamps55 Nm (41 lb-ft)
5. 5

   Remove the forward exhaust hanger
   Locate the rubber exhaust hanger near the front of the resonator. The hanger connects to a bracket on the resonator and a mounting point on the vehicle frame. Use an exhaust hanger removal tool or pry the rubber hanger off the mounting bracket with a flat bar. If the hanger is cracked or torn, replace it during reassembly.
   ⚠Rubber hangers can snap loose suddenly. Keep fingers clear of pinch points.
6. 6

   Remove the rear exhaust hanger
   Locate the second rubber exhaust hanger near the rear of the resonator assembly. Remove this hanger using the same technique as the forward hanger. The resonator should now be free from all mounting points but still supported by your jack or support.
7. 7

   Separate and remove the resonator
   Carefully pull the resonator forward to separate it from the rear pipe connection, then pull backward to separate from the front pipe. You may need to twist and rotate the resonator slightly to break it free from the pipes. Lower the support jack and remove the resonator from under the vehicle. Use a wire brush to clean the pipe ends where the clamps were located, removing rust and carbon buildup.
8. 8

   Inspect connections and prepare new resonator
   Inspect both pipe ends for damage, cracks, or excessive corrosion. Check that the pipe diameters match the new resonator connections. Compare the old resonator to the new one to verify correct part. Apply a small amount of anti-seize compound to the outside of the pipe ends where clamps will seat to ease future removal.
9. 9

   Install the new resonator
   Position the support jack under the new resonator and raise it into approximate position. Slide the resonator inlet over the forward pipe from the catalytic converters, ensuring at least 2 inches of overlap. Then slide the outlet pipe into the rear connection toward the muffler. Align the resonator so hanger brackets line up with mounting points and the assembly sits level without binding.
10. 10

    Install exhaust hangers
    Install new or reuse existing rubber exhaust hangers at both mounting points. Ensure the hangers are fully seated on both the resonator brackets and frame mounting points. The resonator should hang freely without binding or tension when hangers are properly installed.
11. 11

    Install and tighten exhaust clamps
    Install the forward exhaust clamp over the joint between the intermediate pipe and resonator inlet. Position the clamp so the bolt is accessible and the clamp covers the joint completely. Hand-tighten the nut initially. Repeat for the rear clamp. Verify both joints have proper overlap and alignment before final tightening. Using a torque wrench, tighten both clamp nuts to specification in an alternating pattern.
    Torque spec

    Exhaust Clamps55 Nm (41 lb-ft)
12. 12

    Remove support and verify clearances
    Remove the support jack from under the resonator. Visually inspect all clearances around the resonator, ensuring it does not contact the driveshaft, frame rails, fuel lines, or brake lines. There should be at least 1 inch of clearance to all components. Gently push up and down on the resonator to verify hangers are secure and allow proper flex.

Reassembly

1. Lower vehicle from jack stands carefully
2. Remove wheel chocks and return tools to storage
3. Double-check all clamps are tightened to specification before starting engine

Verification

• Start the engine and allow it to idle. Listen for any exhaust leaks at the clamp connections - a ticking or hissing sound indicates a leak requiring clamp retightening
• Visually inspect both clamp connections for visible exhaust gas escaping while engine is running
• Rev the engine to 2500-3000 RPM and verify no unusual vibrations or rattling from the exhaust system
• With engine at operating temperature, check all connections again for leaks or loose clamps
• Test drive the vehicle and listen for any abnormal exhaust sounds, rattles, or vibrations during acceleration and deceleration

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