2015 Ford F-350 Super Duty: Cracked engine valve
Common wear/failure (not a recall)
Symptoms
Owners of the 2015 F-350 Super Duty report: cracked engine valve. CarComplaints.com lists 1 owner complaints, average mileage 140,000 miles.
NHTSA has 40 owner complaints for the 2015 F-350 Super Duty in this area. Examples:
- NHTSA complaint ODI #11676208 (filed 07/25/2025): “2015 ford f350 6.7 liter diesel turbocharger with only 58,000 miles malfunctioned while accelerating on to freeway without any prior warning indicators or symptoms. immediately engine acceleration was reduced drastically causing freeway cars to nearly rear end…”
- NHTSA complaint ODI #11647012 (filed 03/07/2025): “The contact owns a 2015 ford f-350. the contact stated that upon inspecting the oil level, the dipstick had fractured in half. in addition, the contact stated that the dipstick was rusted. the vehicle was not repaired. the local dealer was not contacted. the m…”
Likely causes
Sources do not establish a single root cause; diagnosis is needed. Owner-reported fixes are listed below.
Fix, in plain English
Most common owner-reported solutions on CarComplaints.com: replace heads (1 reports). Check for open recalls and extended warranty coverage with a dealer before paying out of pocket.
DIY difficulty: Pro
Internal engine work (lifters, oil consumption, fuel dilution diagnosis) requires engine teardown or dealer software/tests. (Our assessment.)
Cost
CarComplaints.com owners report a typical repair cost of about $4,300 (owner-reported average, not a quote).
Typical parts (search links, no affiliate codes)
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