1992 MERCURY COUGAR

Typical onset: 80,000-140,000 mi

Symptoms: White smoke from exhaust on startup, Coolant loss with no visible leaks, Milky oil on dipstick or oil cap, Overheating under load, Rough idle and cylinder misfire codes

Fix: Both head gaskets must be replaced together; machine shop work required for warped heads (common). Expect 12-16 labor hours. Many owners find it's cheaper to install a remanufactured engine than fix aged heads properly, especially if mileage is over 150k.

Estimated cost: $1,800-3,200

Typical onset: 90,000-130,000 mi

Symptoms: Pink or strawberry milkshake appearance in transmission fluid, Sudden transmission slipping or no movement, Coolant in transmission pan during service, Transmission overheating warnings or erratic shifting

Fix: The built-in transmission cooler inside the radiator fails, allowing coolant and ATF to mix—this destroys the transmission within days. Fix requires radiator replacement, external cooler installation, complete transmission flush or rebuild. If caught early (fluid check at every oil change), just radiator and cooler: 4-6 hours. If transmission is contaminated, add 8-12 hours for rebuild.

Estimated cost: $800-1,200 (early catch); $2,200-3,800 (with transmission rebuild)

Typical onset: 70,000-110,000 mi

Symptoms: Intermittent no-start, especially when engine is hot, Random stalling at idle or while driving, Crank but no spark condition, Multiple cylinder misfire codes

Fix: The ignition control module (mounted on the coil pack) fails from heat cycling. Replace module and coil pack together—separate replacement often leads to comeback. 1.5-2.5 hours labor. NHTSA had a recall for ignition system issues; verify if completed.

Estimated cost: $350-650

Typical onset: 100,000-150,000 mi

Symptoms: Hard starting after sitting overnight, Loss of power under acceleration, Engine stumbling or hesitation at highway speeds, Check engine light with lean codes

Fix: In-tank fuel pump fails; fuel filter (under car near tank) clogs from rust in aging tanks. Always replace filter with pump—it's cheap insurance. Pump replacement: 2-3 hours. Check fuel lines for corrosion per NHTSA recall.

Estimated cost: $450-750

Typical onset: 80,000-120,000 mi

Symptoms: Clunking when shifting from Park to Drive or Reverse, Excessive vibration at idle in gear, Visible transmission movement when revving engine, Shifter feels loose or sloppy

Fix: Rubber transmission mounts deteriorate and collapse. Cheap part, straightforward replacement. 1.5-2 hours labor. Don't ignore—excessive movement can damage shift cables and exhaust hangers.

Estimated cost: $200-350

Symptoms: Headlights intermittently fail to turn on, Dash lights flickering or out, Burnt plastic smell from under dash, Switch feels hot to touch

Fix: Internal contacts in headlight switch overheat and fail—NHTSA recall item, check if completed. Replacement is straightforward: pull dash bezel, swap switch. 1-1.5 hours. Don't drive at night until fixed.

Estimated cost: $150-280

Typical onset: 90,000-140,000 mi

Symptoms: Window slow to move or moves in jerks, Grinding or clicking noise when operating window, Window falls into door or won't stay up, Motor runs but window doesn't move

Fix: Plastic window regulator gears strip; motors burn out from strain. Driver's side fails most often. Requires door panel removal and regulator replacement. 2-2.5 hours per door.

Estimated cost: $250-450 per window