2000 FORD EXCURSION

Typical onset: 80,000-150,000 mi

Symptoms: rough idle or misfire, Check Engine Light with P030x codes, loud popping noise from engine bay, loss of power

Fix: Early 2-valve Tritons have inadequate thread engagement for spark plugs. Plugs can blow out of the head, stripping threads, or break off during removal. Prevention: replace plugs every 60k with anti-seize. Repair requires HeliCoil inserts (1.5-2 hrs per hole) or cylinder head removal if severely damaged (8-12 hrs per head).

Estimated cost: $300-600 per plug if caught early; $2,500-4,500 if head removal needed

Typical onset: 120,000-180,000 mi

Symptoms: loud knocking on cold start that fades when warm, excessive oil consumption (1+ qt per 1000 mi), white or blue smoke from exhaust, loss of compression

Fix: Poor piston skirt design causes slap; worn rings or cracked ring lands lead to catastrophic oil consumption. Once knocking is persistent hot, engine is toast. Requires complete engine rebuild or replacement (20-30 hrs labor for long block swap).

Estimated cost: $4,500-8,000

Typical onset: 100,000-150,000 mi

Symptoms: transmission slipping or delayed engagement, burnt transmission fluid smell, check transmission light, coolant in transmission fluid or vice versa

Fix: Internal transmission cooler inside radiator can rupture, cross-contaminating coolant and ATF—destroys transmission quickly. Install external trans cooler as prevention. If cooler fails, requires transmission rebuild (12-16 hrs) plus radiator replacement (3 hrs). Flush cooling system thoroughly.

Estimated cost: $2,800-4,500

Typical onset: Any mileage, age-related

Symptoms: hard starting or no-start when cold, diesel fuel smell in cab or under hood, visible fuel leak on top of engine, loss of prime

Fix: O-rings under fuel bowl heater (top of engine) dry out and leak, causing air intrusion into fuel system. Simple fix but often misdiagnosed. Replace O-rings and refill fuel filter bowl (1-1.5 hrs).

Estimated cost: $150-300

Typical onset: 150,000-250,000 mi

Symptoms: rough idle especially when cold, extended cranking before start, black smoke on acceleration, loss of power, hard start after sitting overnight

Fix: HEUI injectors develop sticky solenoids or internal seal wear. Often starts with one or two injectors causing misfire codes. Individual injector replacement requires valve cover removal and special tools (2-3 hrs per injector). All 8 is 10-14 hrs labor.

Estimated cost: $400-700 per injector; $3,500-5,500 for all eight

Typical onset: 80,000-140,000 mi

Symptoms: grinding or humming from front end, wheel play when jacked up, ABS light, 4WD won't engage or stuck engaged

Fix: Unit bearings fail from weight and exposure. Manual locking hubs (if equipped) wear internally, causing vacuum leaks or mechanical failure. Replace hub bearings as pairs (2.5-3 hrs per side). Locking hubs are 1 hr per side.

Estimated cost: $600-1,200 for both hub bearings; $300-500 for both locking hubs

Typical onset: 70,000-120,000 mi

Symptoms: clunking over bumps, wandering steering, uneven tire wear, steering wheel vibration

Fix: Heavy truck with heavy loads accelerates front-end wear. Upper and lower ball joints require press work (3-4 hrs per side for uppers/lowers). Tie rod ends are 2 hrs total. Alignment required after.

Estimated cost: $800-1,500 for ball joints both sides; $300-500 for tie rods

Typical onset: 100,000+ mi

Symptoms: loud ticking from engine bay, exhaust smell in cab, sooty residue on manifold, loss of boost pressure if turbo side affected

Fix: Manifold studs corrode and snap due to heat cycling. Common on passenger side rear and driver side front. Requires manifold removal and stud extraction (4-6 hrs per side). Use ARP studs on reinstall.

Estimated cost: $600-1,200 per side