Ford Super Duty Common Problems — F-250 & F-350
Ford Super Duty F-250 F-350 common problems — 6.0L 6.4L 6.7L Powerstroke, 5.4L 6.2L gas. Diesel and gas diagnosis in Chico CA. (530) 826-4275.
The Short Answer: The most problematic Super Duty is the 6.0L Powerstroke (2003–2007). The 6.4L is expensive to maintain. The 6.7L is the most reliable diesel Ford has built. Gas-powered Super Duties (5.4L, 6.2L) have their own known issues. Know your engine before buying.
The Ford Super Duty (F-250, F-350) is the backbone of Chico's contractor, ranching, and towing community. But Super Duty ownership requires understanding which engine you have — the difference in reliability and maintenance cost between a 6.0L Powerstroke and a 6.7L Powerstroke is enormous. Tedious Auto Repair in Chico has worked on every Super Duty generation and knows where each one fails.
6.0L Powerstroke (2003–2007) — The Problem Child
EGR Cooler Failure
The 6.0L's biggest weakness. The EGR cooler transfers engine exhaust heat to coolant, causing the cooler to crack internally over time. Coolant mixes with exhaust gases, causing white smoke, coolant loss, overheating, and eventual head gasket failure. EGR cooler delete and oil cooler replacement is the permanent fix.
Oil Cooler Clogging
The 6.0L oil cooler uses coolant to cool engine oil. Over time, scale and debris clog the passages, reducing oil cooling. This causes overheating and turbo failures. Oil cooler replacement is typically done alongside EGR cooler replacement.
Head Gaskets
The 6.0L uses stretch-to-yield head bolts and has insufficient clamping force for the cylinder pressures. Head gasket failure is common, especially on neglected examples. Upgraded ARP studs are the proper fix during head gasket replacement.
6.4L Powerstroke (2008–2010)
DPF and EGR System
The 6.4L uses a two-stage turbo and a diesel particulate filter. Frequent regeneration cycles stress the engine. Many owners delete the DPF — which is illegal in California. Oil dilution from regen cycles is a known issue. Change oil every 5,000 miles.
Radiator and Cooler Failures
The 6.4L has a known radiator delamination issue — the inner plastic tanks separate from the aluminum core. Requires radiator replacement. Oil cooler failures are also common.
6.7L Powerstroke (2011–present) — Most Reliable
EGR and DPF Maintenance
The 6.7L is Ford's most reliable diesel but still requires EGR and DPF maintenance. Fuel dilution in the oil is less severe than the 6.4L but still occurs. 5,000-mile oil changes with Motorcraft diesel oil are critical.
CP4 Injection Pump
2017+ 6.7L uses the Bosch CP4 injection pump. This pump is known to fail catastrophically, sending metal debris throughout the fuel system. Fuel system contamination repair costs $8,000–$15,000+.
Gas Super Duty Problems
5.4L Triton V8 — Spark Plugs
The 2-valve and 3-valve 5.4L Triton has a notorious spark plug ejection issue (2-valve) and spark plug breaking in the head issue (3-valve). Plug replacement must be done carefully by an experienced technician. Do not let a spark plug sit until it's impossible to remove.
6.2L Gas V8
The 6.2L is generally reliable. Spark plugs at 100,000 miles, timing chain inspection at 150,000 miles. Less problematic than diesel options but significantly less torque for heavy towing.
Frequently Asked Questions
What are the most common Ford Super Duty problems?
The most problematic Super Duty is the 6.0L Powerstroke (2003–2007) — EGR cooler failure, oil cooler clogging, and head gasket failure are all common. The 6.4L has DPF and radiator issues. The 6.7L (2011+) is the most reliable but requires strict oil change intervals. Gas 5.4L has spark plug issues.
Is the 6.0L Powerstroke reliable?
The stock 6.0L Powerstroke is not reliable without upgrades. EGR cooler failure, oil cooler clogging, and head gasket failure are common. A properly maintained 6.0L with EGR cooler delete, new oil cooler, and ARP head studs can be reliable — but it requires significant preventive investment.
How much does 6.0L Powerstroke EGR cooler replacement cost?
6.0L Powerstroke EGR cooler replacement at Tedious Auto Repair is quoted after inspection — it typically involves oil cooler replacement at the same time. Budget $2,500–$4,500 for a complete EGR and oil cooler repair including head gasket inspection. Call (530) 826-4275 for a written estimate.
Does Tedious Auto Repair work on Ford Super Duty diesel?
Yes. Tedious Auto Repair services all Ford Super Duty generations — 6.0L, 6.4L, and 6.7L Powerstroke, plus 5.4L and 6.2L gas engines. We have professional Ford diesel diagnostic equipment and 18+ years of diesel experience in Chico CA.
Written by Buddy Rausch, Owner & ASE Master Technician — Tedious Auto Repair, 2695 CA-32, Chico CA 95973. 4.9★ / 714 reviews. NAPA Gold AutoCare since 2007. (530) 826-4275