2009 FORD E-350

Typical onset: 60,000-150,000 mi

Symptoms: Sudden misfire with loud popping or hissing sound from engine bay, Complete loss of power on one cylinder, Check engine light with misfire codes P0300-P0310, Metal debris visible in spark plug well

Fix: The 2-valve Triton V10 has notoriously weak spark plug threads that strip or allow plugs to eject under combustion pressure. Repair requires HeliCoil or TIME-SERT thread insert (2-3 hours labor per cylinder), but if the plug damages the head on exit, you're looking at head removal, machining, and reinstallation. Preventive torque-checking every 30k miles is critical. Some shops pre-emptively install inserts on all cylinders during plug changes.

Estimated cost: $400-800 per cylinder for insert, $3,500-5,500 if head work required

Typical onset: 80,000-140,000 mi

Symptoms: Transmission slipping or delayed engagement, Milky pink transmission fluid (coolant mixing), Chocolate milk appearance in coolant reservoir, Transmission overheating warning, Engine overheating in severe cases

Fix: The internal transmission cooler in the radiator fails, allowing coolant and ATF to mix. This destroys the transmission within days if not caught immediately. Proper fix requires new radiator, complete transmission fluid system flush (including torque converter and cooler lines), and often transmission rebuild if contamination went undetected. Install external auxiliary cooler to prevent recurrence. 8-12 hours labor for full repair without trans rebuild, add 16-20 hours if transmission needs overhaul.

Estimated cost: $1,200-2,000 for cooler/flush only, $3,500-5,500 if transmission damaged

Typical onset: 70,000-120,000 mi

Symptoms: Loud ticking or exhaust leak sound on cold start that may improve when warm, Visible soot streaks on manifold, Exhaust smell in cabin, Check engine light with O2 sensor codes

Fix: Exhaust manifold studs corrode and snap, particularly on the passenger side. Broken studs must be drilled and extracted from the cylinder head, which is time-intensive and risks head damage. On a V10, accessing rear cylinders requires pulling the engine forward or removing significant components. Budget 6-10 hours labor per side depending on how many studs are broken and whether extraction goes smoothly.

Estimated cost: $800-1,800 per side

Typical onset: 90,000-150,000 mi

Symptoms: No-start or extended cranking, especially when hot, Stalling at idle or low speed, Intermittent fuel pump operation, Engine cuts out then restarts after sitting

Fix: The fuel pump driver module (FPDM) mounted on the frame rail near the fuel tank fails due to heat and corrosion. It's a relatively cheap part but requires getting under the van to access. Often misdiagnosed as fuel pump failure, leading to unnecessary tank drops. Test the module first before replacing the pump. 1.5-2.5 hours labor.

Estimated cost: $250-450

Typical onset: 100,000-160,000 mi

Symptoms: Rough idle or high idle, Coolant loss with no visible external leaks, White smoke from exhaust on startup, Engine overheating, Codes for lean condition or misfires

Fix: The plastic intake manifold develops coolant leaks at the gasket interface, either externally or internally into the cylinders. The V10 intake is massive and requires removing coil packs, injectors, and throttle body. Internal leaks can hydrolock cylinders if enough coolant accumulates. Use improved aftermarket gaskets, not OEM. 8-10 hours labor for complete intake removal and gasket replacement.

Estimated cost: $1,200-2,200

Typical onset: 80,000-140,000 mi

Symptoms: Gear oil leak at wheel hubs, Grinding or howling noise from rear, worse on turns, Play in rear wheel when jacked up, Vibration at highway speed

Fix: Rear axle seals leak and contaminate brake shoes, while wheel bearings fail from wear or lack of maintenance. On dually models, bearing replacement requires pressing out the old bearing and pressing in new, which requires specialized tools. Full axle service including both seals, bearings, and brake cleaning runs 4-6 hours per side. If the ring and pinion are worn or damaged from low fluid, you're looking at a complete differential rebuild.

Estimated cost: $600-1,200 per axle for seal/bearing, $2,000-3,500 for diff rebuild