2004 ISUZU RODEO

Typical onset: 90,000-150,000 mi

Symptoms: Excessive oil consumption (1 quart per 500-1000 miles), Blue smoke on startup or acceleration, Sudden knocking or ticking from lower end, Check engine light with misfire codes, Complete seizure if oil starvation goes unnoticed

Fix: Once rings collapse or bearings spin, it's rebuild or replace time. Short block replacement is 18-24 hours labor; full rebuild 24-30 hours. Many owners opt for used Japanese-import engines (8-12 hours swap). Oil consumption starts subtly then accelerates rapidly — catastrophic failure often happens within weeks of ignoring it.

Estimated cost: $3,500-6,500

Typical onset: 80,000-130,000 mi

Symptoms: Transmission fluid in coolant reservoir (strawberry milkshake appearance), Coolant in transmission pan, Erratic shifting or slipping after overheating event, Transmission overheating warning (if equipped)

Fix: The cooler integrated into the radiator fails internally, allowing fluid exchange. Requires radiator replacement, full transmission fluid flush (sometimes multiple flushes), and often transmission rebuild if contamination sat for any length of time. Cooler lines themselves also rot at frame brackets. Total repair 6-10 hours if trans is still functional; add 14-20 hours if rebuild needed.

Estimated cost: $800-1,200 (cooler only); $2,800-4,500 (if trans damaged)

Typical onset: 70,000-110,000 mi

Symptoms: Violent clunk when shifting from Park to Drive or Reverse, Shudder or vibration at idle in gear, Excessive driveline movement visible from outside, Banging noise over bumps

Fix: The rear transmission mount separates or the rubber deteriorates completely. Not dangerous but makes the vehicle feel like it's falling apart. Replacement is straightforward: 1.5-2.5 hours with a transmission jack. Often done alongside engine mounts since labor overlap is minimal.

Estimated cost: $250-450

Typical onset: 100,000-150,000 mi

Symptoms: Wandering or vague steering feel, Rear axle visibly misaligned or dog-tracking, Clunking from rear over bumps, Uneven or rapid rear tire wear

Fix: The rubber bushings in the rear trailing arms crack and separate, allowing the axle to shift under load. This was subject to a recall but many weren't fixed or have deteriorated since. Replacement requires pressing out old bushings and installing new ones; 3-4 hours per side. Alignment mandatory afterward.

Estimated cost: $600-1,000

Typical onset: 100,000-160,000 mi

Symptoms: Intermittent no-start, especially when hot, Engine cranks but won't fire, Loss of power or stalling at highway speeds, Fuel pump doesn't prime when key turned on

Fix: The fuel pump relay under the hood fails due to heat cycling, or the pump itself dies in the tank. Relay is a $30 part and 15 minutes; pump replacement requires tank drop, 3-4 hours labor. The recall addressed pump wiring harness chafing, but pumps still fail from age. Always check relay first.

Estimated cost: $50-80 (relay); $600-900 (pump)

Typical onset: 120,000-180,000 mi

Symptoms: Coolant seeping from head/block junction on one or both banks, Gradual coolant loss without visible external drips (evaporates off hot manifold), White residue on engine block near head, Overheating if leak becomes severe

Fix: Unlike typical catastrophic head gasket failures, these usually leak externally first. Requires removal of both heads, resurface, new gaskets, timing belt, and water pump while in there. 12-16 hours labor. If caught early before overheating, heads are usually fine; delay risks warp.

Estimated cost: $1,800-2,800

Typical onset: any mileage

Symptoms: 4WD warning light flashing, Inability to engage or disengage 4WD, Grinding or clunking when attempting 4WD shift, Front wheels not pulling in 4WD mode

Fix: The electronic shift-on-the-fly system uses an actuator motor on the transfer case that corrodes or burns out. Replacement is 2-3 hours but diagnosis can be tricky if wiring or module is at fault. Not critical unless you need 4WD regularly; many owners just live with 2WD.

Estimated cost: $400-700