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Message: [QUOTE="6L strokin, post: 108693, member: 637"] Might want this to be a sticky as a lot are starting to post about this issue after getting some miles racked up... Talked to my buddy that's a diesel mechanic yesterday at ford and he did some research on the engine tick... Found some tsb on it but the bad news.... It's normal! In a nutshell it's the breaking in/wear of the engine internals and it's present in all diesels (7.0,6.0,etc) however the new trucks are so quiet you can actually hear the breaking in "tick".... Here's the tsb he emailed to me 6.7L DIESEL—TICK/TAP NOISE AT IDLE TSB 10-19-2 FORD: 2011 F-250, F-350, F-450, F-550 ISSUE Dealers should not attempt to compare any Some 6.7L diesel equipped vehicles may exhibit a customer vehicles exhibiting this noise with other ticking noise at idle after an engine oil change. It is similar vehicles as the noise is different from vehicle often referred to as Typewriter Noise because of its to vehicle and this may lead to the incorrect similarity to the sound of random typing on a conclusion that the vehicle has a condition. mechanical typewriter. Customers may report that Typewriter Noise is a normal operating when near a building, wall or drive through window, characteristic of this diesel engine. This noise has that this noise can be heard from inside the cab. no short or long term effects on the engine. Do not attempt repairs to eliminate this noise. This noise is ACTION characteristic of the 6.7L diesel engine and will Follow the Service Information to inform the typically cease or diminish significantly within the oil customer of the characteristic. change maintenance interval. SERVICE INFORMATION Refer to vehicle Owner Guides and Maintenance Guides for approved engine oil viscosities and The relationship between the oil film, crankshaft usage information. Use of different oil viscosities will journals, bearing inserts and engine cylinder block not eliminate this noise and is not recommended. produces a sound that is heard as a ticking noise. Customers should be informed that these conditions The overall noise reduction in engines produced do not affect engine durability and no repairs are today makes this noise seem new when, in fact, it necessary. was present in prior model year vehicles, but masked by other noises in the past. Because the WARRANTY STATUS: Information Only - Not 6.7L diesel engine includes a number of design Warrantable improvements to reduce diesel engine noise, Typewriter Noise can be more noticeable than on previous products. Typewriter Noise is not detrimental to engine function or durability. Other manufacturers of diesel engines have reported the presence of this condition for a number of years. Build tolerance stack-up from engine to engine contributes to perceived differences in noise intensity. 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. # [/QUOTE]