Grand Marquis V8-4.6L Flex Fuel (2010)
Muffler: Service and Repair
Muffler and Tailpipe - Fire Suppression System
Muffler and Tailpipe - Fire Suppression System
Removal
NOTICE: Do not use oil or grease-based lubricants on isolators. They may cause deterioration of the rubber.
NOTICE: Oil or grease lubricants on the isolators may cause the exhaust hanger isolators to separate from the exhaust hanger bracket during
vehicle operation.
1. WARNING: Before servicing a vehicle equipped with a fire suppression system, depower the system by following the procedure in
Vehicle Jacking and Lifting. Failure to follow the instructions may result in serious personal injury.
NOTE: Single exhaust shown, dual similar.
With the vehicle in NEUTRAL, position it on a hoist. For additional information, refer to Vehicle Jacking and Lifting.
2. Remove the rear suspension lateral arms. For additional information, refer to Rear Suspension.
3. Remove the rear coil springs. For additional information, refer to Rear Suspension.
4. Remove the 2 nuts, the exhaust damper (if equipped) and the exhaust inlet pipe-to-muffler clamp.
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Discard the nuts.
5. NOTE: Carefully turn the muffler and tail pipe assembly counterclockwise around the rear axle to remove.
Detach the 2 isolators and remove the muffler and tail pipe.
Installation
1. NOTE: Check the isolator for wear or damage. Install a new isolator as necessary.
Position the tail pipe and attach the isolator.
2. NOTE: Check the isolator for wear or damage. Install a new isolator as necessary.
Position the muffler and attach the isolator.
3. NOTE: Install new exhaust fasteners. Do not tighten the fasteners until all components are assembled.
NOTE: Alternately tighten the fasteners to specifications. Draw flanges together evenly.
Connect the muffler and tail pipe and install new fasteners.
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Tighten nuts to 33 Nm (24 lb-ft).
4. Connect the exhaust inlet pipe and muffler.
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Install the clamp, the exhaust damper (if equipped) and the 2 nuts.
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Tighten to 48 Nm (35 lb-ft).
