2019 FORD E-350

Typical onset: 60,000-120,000 mi

Symptoms: Sudden metallic knocking or rattling from bottom end, Loss of oil pressure at idle or under load, Metal shavings in oil on routine changes, Check engine light with low oil pressure codes

Fix: The 6.8L V10 in this era has documented issues with rod and main bearing wear leading to spun bearings and catastrophic failure. Fix requires complete short block replacement or engine rebuild with upgraded bearings. Expect 18-24 labor hours for short block swap, 25-35 hours for full teardown rebuild.

Estimated cost: $8,000-14,000

Typical onset: 50,000-90,000 mi

Symptoms: Transmission fluid leaking from radiator area or cooler lines, Pink or red fluid pooling under vehicle, Transmission overheating warnings, Burnt transmission fluid smell

Fix: The steel cooler lines running to the radiator corrode and develop pinhole leaks or crack at crimp points. If leak allows fluid loss during operation, the 6R140 trans will overheat and fail internally. Replacement involves new OEM lines and often full cooler flush. 3-5 labor hours depending on access and if radiator removal needed.

Estimated cost: $600-1,200

Typical onset: 70,000-110,000 mi

Symptoms: Clunking when shifting into drive or reverse, Excessive drivetrain movement during acceleration, Vibration at idle in gear, Visible sagging or cracking of rubber mount

Fix: The rear transmission mount deteriorates from the V10's torque and weight of upfit bodies. Rubber separates from metal brackets. Replacement requires lifting transmission slightly with jack. 2-3 labor hours.

Estimated cost: $350-650

Typical onset: 80,000-150,000 mi

Symptoms: White smoke from exhaust on cold start, Coolant loss with no visible external leaks, Overheating under load or towing, Milky oil or oil in coolant reservoir, Misfires on multiple cylinders

Fix: The 6.8L V10 develops head gasket leaks between cylinders or into coolant passages. Often both banks need replacement at once. Requires heads pulled, machined flat, new gaskets and studs. If heads are warped beyond spec, add $800-1,200 per head for replacement. 16-22 labor hours for both banks.

Estimated cost: $3,500-6,000

Symptoms: Sudden loud popping noise from engine bay, Immediate misfire on one cylinder, Hissing sound from cylinder head, Loss of power

Fix: The two-piece spark plug design and aluminum head threads can strip or allow plug to blow out under combustion pressure, especially if over-torqued during service or if plug hasn't been changed on schedule. Requires HeliCoil or TimeSert thread repair kit. 2-4 hours per cylinder depending on access.

Estimated cost: $400-800

Typical onset: 90,000-140,000 mi

Symptoms: Hard starting or extended crank time, Loss of power under acceleration, Rough idle or stumbling, Fuel pump whining noise from tank area

Fix: The in-tank fuel pump can fail and send debris through fuel system. Requires pump replacement plus fuel filter change and often fuel rail/injector cleaning or replacement if contaminated. Tank drop required. 4-6 labor hours.

Estimated cost: $800-1,500