2025 DAIHATSU THOR

Typical onset: 80,000-120,000 mi

Symptoms: Rattling noise on cold start that quiets after warmup, Check engine light with cam/crank correlation codes (P0016, P0017), Rough idle or hesitation during acceleration, Metal shavings in oil at oil changes

Fix: Requires timing chain, tensioner, guides, and both cam gears replacement. Engine stays in car but extensive front-end disassembly needed. 6-8 labor hours at indie shop rates. Critical to address early—jumped timing destroys valves.

Estimated cost: $1,200-2,000

Typical onset: 70,000-110,000 mi

Symptoms: Persistent ticking or tapping from valve cover, especially when warm, Loss of power or misfires under load, Noise worsens with extended oil change intervals, May trigger misfire codes on affected cylinders

Fix: All lifters should be replaced as a set with fresh oil and filter. Valve cover removal, 3-4 hours labor. These small engines are intolerant of oil neglect—collapsed lifters can damage cam lobes. Use factory-spec 0W-20 oil only.

Estimated cost: $600-900

Typical onset: 60,000-90,000 mi

Symptoms: Transmission slipping or shuddering during acceleration, Milky or discolored CVT fluid (coolant contamination), Overheating transmission warning light, Loss of forward gears after coolant system work

Fix: Internal cooler in radiator fails, allowing coolant and CVT fluid to mix. Requires radiator replacement, complete CVT fluid flush (sometimes multiple flushes), and new transmission filter. If caught early, CVT may survive; delayed diagnosis often means transmission replacement. 4-6 hours labor for cooler/flush, 12+ hours if CVT replacement needed.

Estimated cost: $800-1,400 (cooler/flush only); $3,500-5,500 (CVT replacement)

Typical onset: 90,000-140,000 mi

Symptoms: White smoke from exhaust, especially on startup, Coolant loss with no visible leaks, Overheating under boost or highway driving, Bubbles in coolant reservoir when engine running, Oil cap shows milky residue

Fix: Turbo models run higher cylinder pressures; OE head gasket marginal past 100k. Requires cylinder head removal, resurfacing, new gasket set, timing components, and fluids. Always check head for cracks and warpage—machine work adds cost. 10-14 hours labor. Replace thermostat and water pump while you're in there.

Estimated cost: $2,200-3,800

Typical onset: 100,000-150,000 mi

Symptoms: Vibration that increases with RPM, felt through steering wheel, Visible wobble of crankshaft pulley, Serpentine belt wear or walking off pulleys, Rubber separation visible between inner and outer rings

Fix: The rubber ring in the harmonic balancer degrades from heat cycles. Replacement is straightforward but requires specialized puller and installer tools. 2-3 hours labor. Inspect carefully during timing chain jobs—failed balancer can cause crank sensor codes and no-starts.

Estimated cost: $400-650

Typical onset: 50,000-80,000 mi

Symptoms: Clunking when shifting from Park to Drive or Reverse, Excessive vibration at idle in gear, Visible engine/trans movement when revving in Park, Harsh engagement when accelerating from stop

Fix: Rubber mounts wear quickly on these light vehicles with relatively torquey turbo engines. Typical 1.5-2 hour job to replace upper and lower mounts. Inspect all engine mounts simultaneously—they fail in clusters. Use OEM or quality aftermarket; cheap mounts last 6 months.

Estimated cost: $250-450