2004 DAIHATSU COPEN

Typical onset: 60,000-100,000 mi

Symptoms: Persistent ticking or tapping noise from valve cover, especially cold start, Loss of power or rough idle as wear progresses, Check engine light for cam/crank correlation codes in severe cases

Fix: These high-revving turbo motors are notorious for lifter wear due to inadequate oil changes or heat stress. Proper fix involves replacing all lifters/tappets (8-10 hours labor including head removal, valve adjustment). Many shops resurface the head while it's off. Use OEM or quality aftermarket lifters only.

Estimated cost: $1,800-3,200

Typical onset: 80,000-120,000 mi

Symptoms: White smoke from exhaust, especially on startup, Coolant loss with no visible leaks, Overheating or bubbling in coolant reservoir, Milky oil on dipstick or cap

Fix: The JB-DET runs high boost and heat in a tiny package; head gaskets can let go, especially if cooling system maintenance was neglected. Job requires head removal, resurface, new gasket set, timing belt/water pump while you're in there (12-16 hours). Test for compression and leak-down before committing.

Estimated cost: $2,500-4,200

Symptoms: Roof stops mid-cycle with error beep, One side moves slower or binds, Hydraulic fluid leaks in trunk area, Roof won't latch or unlock properly

Fix: The complex multi-link roof has multiple failure points: hydraulic rams leak, limit switches fail, cables stretch, and plastic clips break. Diagnosis takes 1-2 hours; repairs range from simple sensor replacement (1 hour) to full hydraulic pump/ram replacement (4-6 hours). Parts availability from Japan is the real headache. Many owners just leave the roof up or down permanently.

Estimated cost: $400-2,500

Typical onset: 70,000-110,000 mi

Symptoms: Transmission fluid leaking from cooler lines (4-speed auto), Harsh shifts or slipping when fluid is low, Excessive vibration at idle from failed mounts, Clunking on acceleration or deceleration

Fix: The 4-speed auto uses an external oil cooler with rubber lines that harden and leak. Cooler replacement is 2-3 hours. Transmission mounts (engine and trans share some) wear from the constant vibration of the 3-cylinder-like balance. Mount replacement is 2-3 hours total. Always replace fluid after cooler work.

Estimated cost: $600-1,400

Typical onset: 90,000-130,000 mi

Symptoms: Loud chirping or squealing from front of engine, Visible wobble of crankshaft pulley at idle, Serpentine belt wear or repeated belt failures, Rough vibration through whole car

Fix: The rubber ring in the harmonic balancer separates or deteriorates, especially in hot climates. If it fails completely, the crank pulley can walk off and destroy the timing belt, causing catastrophic valve damage. Replacement is straightforward (2-3 hours) but requires special puller/installer tools. Do timing belt at same time since you're right there.

Estimated cost: $800-1,600

Typical onset: 50,000-80,000 mi

Symptoms: Hesitation or stumble under boost, Hard starting after sitting, Loss of top-end power, Rough idle when warm

Fix: These cars often sit for long periods (second car/toy status), leading to fuel varnish and filter clogging. Filter is in-tank on some markets, inline on others (1-2 hours either way). Also recommend fuel system cleaning and fresh fuel if the car has been stored. Turbo cars are sensitive to fuel delivery issues.

Estimated cost: $200-500