2000 DAEWOO LEGANZA

Typical onset: 60,000-90,000 mi

Symptoms: Sudden loss of power and rough running or complete no-start, Metallic rattling from upper engine before failure, Bent valves, damaged pistons, sometimes cracked cylinder head

Fix: This is an interference engine—if the timing belt snaps, valves kiss pistons. You're looking at cylinder head removal, resurfacing, new valves, guides, often camshaft replacement if lobes are damaged. Total job runs 18-24 labor hours for a complete teardown and rebuild. Preventive belt replacement every 60k miles is critical but many owners miss this interval.

Estimated cost: $2,800-4,500

Typical onset: 70,000-120,000 mi

Symptoms: Transmission fluid leaking near radiator or under vehicle, Pink or milky automatic transmission fluid indicating coolant contamination, Erratic shifting or complete transmission failure after coolant mixes with ATF

Fix: Steel cooler lines rot out at fittings and the external cooler itself fails. If coolant gets into the transmission, the auto is toast—requires full rebuild or replacement. Preventive line replacement with upgraded hoses takes 2-3 hours; contaminated trans means 12-16 hours for R&R and rebuild or 8-10 for used unit swap.

Estimated cost: $400-800 for lines only; $2,200-3,800 for transmission rebuild

Typical onset: 80,000-130,000 mi

Symptoms: Vibration at idle and under acceleration, Squealing or chirping from front of engine, Visible wobble of crankshaft pulley, Rubber ring separating from outer pulley shell

Fix: The rubber damper ring delaminates from the hub, causing severe vibration and potential timing belt tracking issues. Requires puller and installer tools—not a backyard job without equipment. About 2.5-3.5 hours including serpentine belt removal and reinstallation. Get OEM-spec replacement, not cheap aftermarket.

Estimated cost: $350-550

Typical onset: 90,000-140,000 mi

Symptoms: White smoke from exhaust on cold start, Coolant loss with no visible leaks, Overheating or fluctuating temperature gauge, Milky oil on dipstick or oil cap

Fix: Head gasket fails between cylinders or into coolant passages. Requires head removal, machining for flatness (almost always warped .008" or more), new gasket set, timing belt, and water pump while you're in there. Figure 14-18 hours for complete job. Head resurfacing adds $120-180 at machine shop.

Estimated cost: $1,800-2,800

Typical onset: 60,000-100,000 mi

Symptoms: Clunking when shifting from park to drive or reverse, Excessive engine movement visible from engine bay during acceleration, Vibration transmitted into cabin at idle in gear

Fix: Hydraulic transmission mount fails internally and the trans sags, causing driveline angles to stress CV joints and shift cables. Replacement is straightforward with a jack and about 1.5 hours labor. Check all mounts at same time—engine mounts often need attention too.

Estimated cost: $180-320

Typical onset: 80,000-120,000 mi

Symptoms: Slipping under acceleration, especially in higher gears, Chatter or vibration during engagement, Difficulty shifting or grinding into gears, Burning smell during normal driving

Fix: Manual transmission cars experience clutch disc glazing and flywheel heat checking. When doing clutch, always resurface or replace flywheel and inspect pilot bearing. Transmission removal runs 6-8 hours. Flywheel resurfacing adds $80-120 at machine shop; replacement flywheel adds $200-300 in parts.

Estimated cost: $900-1,400