2011 FORD EXPEDITION

Typical onset: 80,000-150,000 mi

Symptoms: Cold-start rattle that lasts 5-15 seconds, sounds like marbles in a can, Check engine light with cam position codes (P0012, P0022), Severe cases: metal shavings in oil, complete engine seizure, Loss of power, rough idle after warm-up

Fix: Cam phasers alone are 8-12 hours labor, but by the time owners address it, metal debris has usually contaminated bearings and scored cylinder walls. Most need short block replacement or full rebuild: 25-35 hours labor plus machine work. This engine's two-piece spark plugs compound the problem—broken plugs during removal send debris into cylinders.

Estimated cost: $6,500-12,000

Typical onset: 60,000-120,000 mi

Symptoms: Transmission slipping, delayed engagement, or no movement, Strawberry milkshake appearance in coolant overflow tank (ATF mixing with coolant), Engine overheating combined with transmission issues, Coolant level dropping without external leaks

Fix: The factory oil cooler inside the radiator fails internally, allowing ATF and coolant to mix. Coolant enters transmission destroying clutches and valve body; ATF enters cooling system. Requires transmission rebuild or replacement (12-16 hours), radiator replacement, complete cooling system flush, and all new fluids. Auxiliary external cooler highly recommended during repair.

Estimated cost: $4,000-7,500

Typical onset: null

Symptoms: Plug breaks off during routine 100k service, leaving lower shell in cylinder head, Misfires if plug wasn't sealing properly before removal attempt, Can occur at any mileage if plugs are original or haven't been serviced with proper technique

Fix: The 5.4L 3V uses two-piece plugs that seize in the aluminum head. Extraction requires special tools (Lisle 65600 kit) and patience—1-2 hours per stuck plug if you're lucky. Worst cases need head removal for helicoil repair: add 10-15 hours. ALWAYS use motorcraft plugs and anti-seize on reinstall. This job is why many of these engines end up needing rebuilds—broken plug pieces fall into cylinder.

Estimated cost: $400-2,500

Typical onset: 120,000-180,000 mi

Symptoms: Rattling from front of engine on cold start that persists longer over time, Check engine light with variable valve timing codes, Reduced power and fuel economy, Catastrophic failure: sudden loss of timing, bent valves, destroyed engine

Fix: The 3-valve Triton uses chains, not belts, but they stretch with poor maintenance or failed tensioners. Requires front cover removal, timing set replacement, cam phaser replacement while you're in there: 14-18 hours labor. If chain jumped time, add valve damage inspection and repair.

Estimated cost: $3,200-6,000

Typical onset: 70,000-130,000 mi

Symptoms: Clunking or thudding when shifting from park to drive or reverse, Vibration felt through floor and shifter, Visible sagging or torn rubber on mount during inspection

Fix: The rear transmission mount tears due to the heavy 6R80 transmission and weight of this vehicle. Straightforward replacement: 1.5-2 hours labor. Often ignored until it causes driveline vibration.

Estimated cost: $250-450

Typical onset: 100,000-160,000 mi

Symptoms: Hard starting or extended cranking, especially when fuel level is low, Loss of power under acceleration, surging, Check engine light with fuel pressure or lean codes, Complete stalling if pump fails outright

Fix: The in-tank pump module includes a filter sock that clogs, or the pump motor fails. Tank must be dropped: 3-4 hours labor. Often find debris from deteriorated fuel hoses inside tank. If debris passed through, also replace fuel filter (requires special spring-lock tool on these) and check injectors.

Estimated cost: $800-1,400