2004 DAEWOO LANOS

Typical onset: 75,000-120,000 mi

Symptoms: White smoke from exhaust, especially on cold start, Overheating with no external coolant leaks, Milky oil on dipstick or cap, Loss of coolant into overflow tank, Rough idle and misfires after warmup

Fix: Head gasket job requires cylinder head removal, resurfacing (usually warped 0.005-0.010 inch), new gasket set, timing belt while you're in there. Budget 8-10 hours labor for the 1.5L, 9-11 hours for the 1.6L. Many techs find the head studs stretch and recommend ARP kit. Machine shop resurface adds 2-3 days turnaround.

Estimated cost: $1,200-1,800

Typical onset: 60,000-100,000 mi

Symptoms: Severe clunking when shifting from Park to Drive or Reverse, Vibration at idle that stops when shifted to Neutral, Visible sag of transmission tailshaft on inspection, Driveline shudder during acceleration

Fix: The rubber mounts are soft garbage from the factory. Front and rear trans mounts fail together typically. Requires lifting powertrain slightly with transmission jack. 2.5-3.5 hours labor. Aftermarket replacements aren't much better quality—some techs use polyurethane bushings but they increase NVH.

Estimated cost: $280-450

Typical onset: 80,000-140,000 mi

Symptoms: Loud ticking or tapping from valve cover, especially cold, Noise persists after engine reaches operating temp, Loss of power if lifter collapses completely, Check engine light with misfire codes if valve doesn't open fully

Fix: These lifters are wear-prone and oil-change-sensitive. Single lifter replacement is 4-5 hours because you need to pull the cam. Most techs recommend doing all 16 lifters if more than two are noisy—adds another 1-2 hours. Camshaft inspection is mandatory; often shows wear on lobes. If cam needs replacement, you're at 7-9 hours total labor.

Estimated cost: $650-950 (all lifters); $1,100-1,600 (lifters + camshaft)

Typical onset: 90,000-150,000 mi

Symptoms: Vibration that increases with RPM, especially 2,000-3,000 RPM, Visible wobble of balancer pulley at idle, Serpentine belt tracking issues or repeated belt failure, Rubber ring visibly separating from hub

Fix: The rubber damper ring delaminates from the hub. If it flies apart, it can destroy the crank sensor, alternator, and crack the timing cover. Replacement is straightforward—2.0-2.5 hours—but requires proper puller and installer tools. OEM-style replacements (Dorman, etc.) available, but quality is hit-or-miss.

Estimated cost: $320-480

Symptoms: ATF puddle under front of engine, passenger side, Transmission slipping or delayed engagement after leak starts, Low fluid warning if equipped, or burnt smell, Visible rust perforation on steel cooler lines near radiator

Fix: Steel lines rust through where they mount to the radiator or along the subframe. Not a tough job mechanically—1.5-2 hours—but lines are NLA from Daewoo/GM. Most shops fabricate replacements using transmission cooler hose and adapters or source used lines. Flush and refill ATF after repair. Common in rust-belt states.

Estimated cost: $250-400

Typical onset: 70,000+ mi

Symptoms: Hard starting, especially when fuel tank below 1/4, Hesitation or stumble under load, uphill, or highway passing, Intermittent stalling at idle after driving, Fuel pump whine louder than normal

Fix: In-line filter under car near fuel tank. Should be changed every 30,000 miles but owners ignore it. When clogged, causes fuel pump to work harder and fail prematurely. Filter replacement is 0.8-1.0 hour. If pump is already damaged, add 2.5-3 hours for pump replacement and another $200-300 in parts.

Estimated cost: $120-180 (filter only); $450-650 (if pump also damaged)