SSM 46407

Service Bulletin Details

Public Details for: SSM 46407

Some 2011-2017 f-super duty 6.7l diesel equipped vehicles 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 en

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SSM
46407
Some 2011-2017 F-Super Duty 6.7L diesel equipped vehicles 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 Å’F (65 Å’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.