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Service bulletin AS-21448

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id10039152
Published by NHTSA2011-07-13
Manufacturer's numberAS-21448
Manufacturer's date2010-08-01
NHTSA componentENGINE AND ENGINE COOLING:ENGINE:DIESEL

NHTSA's summary

FORD: THE VEHICLES MAY EXHIBIT AN OIL LEAK FROM THE TOP OF THE LEFT SIDE OF THE ENGINE. IT MAY COLLECT AROUND THE FUEL INJECTORS. *RM

The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

Components

Engine

Vehicles listed
FORD F-250 SD2011 (the catalog's model; the bulletin names a series or trim of it)
FORD F-350 SD2011 (the catalog's model; the bulletin names a series or trim of it)
FORD F-450 SD2011 (the catalog's model; the bulletin names a series or trim of it)
FORD F-550 SD2011 (the catalog's model; the bulletin names a series or trim of it)
FORD F-650 SD2011 (the catalog's model; the bulletin names a series or trim of it)
FORD F-7502011

Listing a model year does not mean every vehicle of it is concerned: the document says which.

Recalls for the same vehicles and component
20151252015-03-24. Engine
15V0520002015-01-30. ENGINE AND ENGINE COOLING:ENGINE
14V4110002014-07-08. ENGINE AND ENGINE COOLING:ENGINE:GASOLINE
14V3820002014-06-10. EQUIPMENT; ENGINE AND ENGINE COOLING:ENGINE:GASOLINE
14V3790002014-06-10. EQUIPMENT; ENGINE AND ENGINE COOLING:ENGINE:GASOLINE
20133722013-10-30. Engine
13V5350002013-10-30. ENGINE

A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.

Other bulletins for the same vehicles and component
24L052025-10-03. Other. Certain 2011-2022 Model Year Super Duty Vehicles Equipped with 6.7L Engine - Emission Control Information Label Update for Qualified Vehicles
24L052025-09-03. Other. Certain 2011-2022 Model Year Super Duty Vehicles Equipped with 6.7L Engine - Emission Control Information Label Update for Qualified Vehicles
22N14 S12024-02-01. Service bulletin. Certain 2011-2012 Model Year F-Series Super Duty Vehicles Equipped with a 6.7L Diesel Engine State Inspection and Maintenance Test Failure Due to DTCs P2073 and/or P2074 Adding owner letter and corrected dealer bulletin. First Part submitted 11/01/23
SSM 516912023-06-16. Service bulletin. 2011-2023 F-Super Duty and 2016-2024 F-650/F-750 vehicles equipped with a 6.7L engine may exhibit an elevated idle condition. During prolonged idle time, vehicles may experience this elevated idle to reduce unburned hydrocarbons from the SCR. The powertrain control module estimates hydrocarbon levels in the SCR and may increase idle speed to remove them. Idle speed will be increased to 1000 RPM for ambient temperatures near 26°C (80°F) and may increase to 1200 RPM at -40 °C (-40°F). Vehicles may exhibit exhaust smoke and diesel exhaust fluid smell during elevated idle condition. Exhaust smoke and smell condition will not affect reliability or durability of the engine. Power take-off (PTO) use and idle set point control will disable elevated speed. It is required that the operator monitor the vehicle and adhere to any Exhaust Filter warning messages.
SSM 512512023-01-05. Service bulletin. Some 2011-2022 F-Super Duty vehicles equipped with a 6.7L diesel engine may exhibit a ticking noise at idle after an engine oil change. It is often referred to as Typewriter Noise because of its similarity to the sound of a mechanical typewriter. When engine temperatures reach 150 °F (65 °C) or higher, (from engine idle up to approximately 1700 RPM's), this noise can typically be heard at the front wheel well and is often isolated to the transmission bell housing or oil pan area. Typewriter Noise is not detrimental to engine function or durability and has no short or long term effects on the engine. Do not attempt repairs to eliminate this noise. This noise is characteristic of the 6.7L diesel engine and will typically cease or diminish significantly within the oil change maintenance interval.
21M042022-05-19. Service bulletin. Certain 2011-2014 Model Year Super Duty Vehicles Equipped with a 6.7L Diesel Engine Exhaust Gas Recirculation Cooler with Diagnostic Trouble Codes P0401 and/or P2457 - In some of the affected vehicles, customers may experience an illuminated malfunction indicator light due to the EGR cooler becoming plugged with hydrocarbon or soot at high mileage. Diagnostic trouble codes (DTC’s) for EGR cooler efficiency below threshold (DTC P0401) and/or insufficient EGR flow at idle (DTC P2457) are stored when the malfunction indicator light is illuminated.
SSM 506362022-03-29. Service bulletin. 2011-2022 F-Super Duty and 2016-2023 F-650/F-750 vehicles equipped with a 6.7L engine may exhibit an elevated idle condition. During prolonged idle time, vehicles may experience this elevated idle to reduce unburned hydrocarbons from the SCR. The powertrain control module estimates hydrocarbon levels in the SCR and may increase idle speed to remove them. Idle speed will be increased to 1000 RPM for ambient temperatures near 26°C (80°F) and may increase to 1200 RPM at -40 °C (-40°F). Vehicles may exhibit exhaust smoke and diesel exhaust fluid smell during elevated idle condition. Exhaust smoke and smell condition will not affect reliability or durability of the engine. Power take-off (PTO) use and idle set point control will disable elevated speed. It is required that the operator monitor the vehicle and adhere to any Exhaust Filter warning messages.
21M042022-02-04. Service bulletin. Customer Satisfaction Program 21M04 Certain 2011-2014 Model Year Super Duty Vehicles Equipped with a 6.7L Diesel Engine Exhaust Gas Recirculation Cooler with Diagnostic Trouble Codes P0401 and/or P2457
SSM 503302021-12-26. Service bulletin. Some 20112014 F-Super Duty vehicles equipped with 6.7L diesel engine may experience an exhaust leak due to broken exhaust manifold studs. New parts have been released to service this condition. Replace the exhaust manifold on the side with a broken stud. On cylinders 1,2,3,5,6 and 7 use stud part number W715713-S431. If replacing the studs on cylinders 4 and/or 8 use stud part number W717172-S900 and replace both studs and install new spacers and heat shields on the affected side(s). Refer to Workshop Manual, Section 303-01. Part numbers: heat shield left side, FC3Z-9Y427-A and DC3Z-9A462-B for the right side. Spacer part number FC3Z-00810-A. Exhaust manifold part numbers: DC3Z-9430-A (right) and DC3Z-9431-A (left). Exhaust Manifold Gasket FC3Z-9448-A. Exhaust Manifold Nut W701706-S430.
TSB1600012021-12-20. Service bulletin. 49 CFR Part 579.5 Monthly Communications - March 2016 Air bag warning light illuminated with diagnostic trouble code (DTC) B141B and/or B141C