2013 FORD F-250

Typical onset: 80,000-150,000 mi

Symptoms: Sudden knocking or rattling from deep in the engine, often at cold start, Metal shavings in oil during routine changes, Loss of power under load, white or blue smoke, Check engine light with misfire or low oil pressure codes

Fix: Early 6.7L engines (2011-2014) have a documented issue with porous engine block castings and weak piston skirts. Connecting rod bearings spin, pistons crack, or blocks crack internally. This requires complete short block replacement or full engine rebuild with updated parts. 30-50 hours labor depending on cab-on vs cab-off repair, plus core exchange and updated engine assembly.

Estimated cost: $15,000-25,000

Typical onset: 60,000-120,000 mi

Symptoms: Transmission fluid in coolant (strawberry milkshake in overflow tank), Coolant in transmission (slipping, erratic shifts, won't move), Overheating transmission or engine temp spikes

Fix: The internal transmission cooler in the radiator fails and allows cross-contamination. Once fluids mix, the transmission is often damaged and requires rebuild or replacement. Fix requires new radiator, complete transmission fluid system flush (or full rebuild if contaminated), torque converter, and sometimes hard lines. 12-20 hours if trans needs rebuild, 4-6 hours if caught early with flush only.

Estimated cost: $3,500-8,000

Symptoms: Hard starting or extended cranking, especially in cold weather, Loss of power, rough idle, stalling, Check engine light with fuel pressure/rail pressure codes, Black smoke under acceleration

Fix: The 6.7L is extremely sensitive to fuel quality and water contamination. Clogged fuel filters are frequent (should be changed every 10k-15k mi), but contaminated fuel can damage the high-pressure fuel pump and injectors. If caught at the filter stage, it's a 1-hour job. If injectors or CP4 pump fail from contamination, you're looking at 8-15 hours for injector replacement or pump R&R with full system flushing.

Estimated cost: $150-6,500

Typical onset: 100,000-180,000 mi

Symptoms: White smoke from exhaust constantly (not just cold start), Coolant loss with no external leaks, Overheating or temperature fluctuations, Rough running, loss of power, coolant smell from exhaust

Fix: The EGR cooler cracks internally and dumps coolant into the intake and exhaust. This can cause hydrolock and bent rods if enough coolant accumulates. Requires EGR cooler replacement, often with full EGR valve and sensors. Also recommend oil and coolant analysis to check for engine damage. 6-10 hours labor depending on accessibility and whether you do EGR delete or OEM replacement.

Estimated cost: $2,000-3,500

Typical onset: 80,000-140,000 mi

Symptoms: Clunking or banging when shifting from park to drive/reverse, Vibration through cab at idle or under throttle, Visible sag or torn rubber on crossmember mount

Fix: The rubber transmission mount deteriorates from heat and load, especially on diesels and trucks that tow heavy. Simple replacement: drop the crossmember, swap the mount. 1.5-2.5 hours labor, often done alongside other trans work.

Estimated cost: $250-500

Typical onset: 120,000-200,000 mi

Symptoms: Loss of boost/power under load, Loud whining or whistling noise from engine bay, Blue or black smoke from exhaust, Oil leaking from turbo or intake piping, Check engine light with boost pressure codes

Fix: Turbo failures stem from oil contamination (usually from the notorious CP4 fuel pump failure sending metal through the system), failed bearings, or wastegate actuator issues. Variable-vane turbos on the 6.7L are expensive. Replacement involves removing exhaust components, downpipe, and intercooler piping. 8-12 hours labor with new or reman turbo.

Estimated cost: $2,500-4,500