exhaust

Muffler

for 2012 Ford F-150 5.0L V8 Coyote · 4WD

Difficulty

Easy

Time

1.3 h

Tools

Steps

This procedure covers removal and replacement of the muffler assembly on a 2011-2014 Ford F-150 with 5.0L V8 Coyote engine and 4WD configuration.

Warnings

⚠️Allow exhaust system to cool completely before starting work. Exhaust components can remain dangerously hot for over an hour after engine shutdown.

⚠Exhaust fasteners may be corroded or seized. Apply penetrating oil 30 minutes before beginning work.

⚠Exhaust hangers are under tension and can snap free unexpectedly. Keep hands and face clear when releasing.

ℹ️Some exhaust noise during cold start is normal for first few drive cycles until new components heat cycle.

Tools required

Floor jack and jack standsEssential

Wheel chocksEssential

15mm socket and ratchetEssential

13mm socket and ratchetEssential

Penetrating oil

Torque wrench (20-70 Nm range)Essential

Anti-seize compoundEssential

Pry bar or exhaust hanger removal tool

Wire brush

Shop light or flashlight

Parts

Muffler assembly × 1 — Use OEM specification or quality aftermarket
Exhaust flange gasket × 1 — 2.5 inch exhaust flange gasket
Muffler clamp × 1 — If original clamp is damaged

Preparation

Park vehicle on level surface and engage parking brake
Place wheel chocks at front wheels
Verify exhaust system is completely cool to the touch
Raise rear of vehicle using floor jack at rear differential and support with jack stands under frame rails
Spray all exhaust clamps, flange bolts, and hanger bolts with penetrating oil and allow to soak for 30 minutes
Inspect work area with shop light to identify muffler location and all connection points

Procedure

1
Disconnect rear muffler outlet connection
Locate the clamp or flange connection between the muffler outlet and the tailpipe. If equipped with a clamp connection, loosen the clamp bolts but do not remove completely. If equipped with a flange connection, remove the two flange bolts completely. Use wire brush to clean exposed threads.
2
Disconnect front muffler inlet connection
Locate the flange connection between the mid-pipe and muffler inlet. Remove the two flange bolts completely and separate the joint. You may need to tap lightly with a rubber mallet to break the seal. Remove and discard the old exhaust gasket.
3
Remove muffler from rubber hangers
The muffler is supported by two or three rubber exhaust hangers. Working from front to back, use a pry bar or exhaust hanger tool to carefully slide the muffler hanger rods out of the rubber isolators. Apply steady pressure perpendicular to the rod direction. Support the muffler weight with your other hand to prevent it from dropping.
4
Remove muffler assembly
With all connections released, carefully lower the muffler assembly from the vehicle. The muffler may still be partially engaged at the rear clamp or flange - use a twisting motion while pulling to separate. Place the old muffler aside safely.
5
Clean and inspect mounting points
Use a wire brush to thoroughly clean all flange surfaces, clamp areas, and hanger mounting points. Inspect rubber exhaust hangers for cracking, tearing, or excessive wear - replace if damaged. Check that hanger brackets are securely mounted to the frame with no cracks or loose bolts.
Torque spec
Hanger Bracket Bolts25 Nm (18 lb-ft)
6
Prepare new muffler
Unpack the new muffler and verify all hanger rods are present and properly positioned. Apply anti-seize compound to all flange bolt threads and the first few threads of hanger bracket bolts if they were disturbed. Install new exhaust flange gasket onto the front muffler inlet flange.
7
Install muffler into rubber hangers
Lift the new muffler into approximate position under the vehicle. Beginning with the front hanger, insert the hanger rod into the rubber isolator. Use a pry bar if necessary to spread the isolator opening. Work toward the rear, installing each hanger rod in sequence. Ensure all rods are fully seated in their isolators.
8
Connect front muffler inlet flange
Align the front muffler inlet flange with the mid-pipe outlet flange, ensuring the new gasket is properly positioned between them. Install both flange bolts finger-tight first, then alternately tighten in a cross pattern to the specified torque. Verify the gasket remains properly centered during tightening.
9
Connect rear muffler outlet
Align the rear muffler outlet with the tailpipe inlet. If using a clamp connection, position the clamp over the joint ensuring equal overlap on both pipes, then tighten clamp bolts to specification. If using a flange connection, install flange bolts with anti-seize and torque to specification.
Torque spec
Muffler Clamps55 Nm (41 lb-ft)
10
Check exhaust system alignment
Visually inspect the entire exhaust system from the engine to the tailpipe exit. Verify there is adequate clearance (minimum 1 inch) between exhaust components and the fuel tank, driveshaft, spare tire, frame rails, and rear axle. Adjust muffler position within the rubber hangers if necessary by loosening one connection and rotating slightly.

Reassembly

Verify all clamp bolts and flange bolts are tightened to proper torque specification
Confirm all exhaust hanger rods are fully seated in rubber isolators
Double-check exhaust clearance to all surrounding components with vehicle at normal ride height
Remove jack stands and carefully lower vehicle to ground

Verification

Start engine and listen for exhaust leaks at all connection points - leaks will produce a ticking or hissing sound
With engine running, feel around flange connections for exhaust gas escaping (hold hand near but not touching hot components)
Perform a test drive and listen for rattles, vibrations, or abnormal exhaust notes
After test drive, re-inspect all connection points for signs of leakage or loosening
Verify tailpipe exit angle and position matches original configuration