1996 ISUZU TROOPER

Typical onset: 80,000-150,000 mi

Symptoms: Excessive blue smoke on startup or acceleration, Quart of oil every 500-800 miles, Fouled spark plugs, Loss of power, Check engine light with misfire codes

Fix: The 3.2L DOHC engine suffers from inadequate piston ring tension and oil control ring collapse. Rings wear grooves into cylinder walls, requiring complete engine rebuild with new pistons, rings, honing, and often crankshaft work. Labor: 25-35 hours for full teardown and rebuild. Many owners opt for used JDM engines instead.

Estimated cost: $3,500-6,500

Typical onset: 70,000-120,000 mi

Symptoms: Transmission fluid leak at radiator, Pink fluid mixing with coolant, Transmission slipping or delayed engagement, Milky appearance in coolant reservoir, Overheating transmission

Fix: The cooler lines rust and corrode where they connect to the radiator, eventually failing. Worse, the internal transmission cooler in the radiator can rupture, allowing coolant into the transmission (strawberry milkshake of death). Requires replacement of cooler lines, often radiator, full transmission flush or rebuild if contaminated. Labor: 3-8 hours depending on transmission damage.

Estimated cost: $400-3,500

Typical onset: 100,000-180,000 mi

Symptoms: White smoke from exhaust, Overheating, Coolant loss with no visible leak, Rough idle or misfire, Oil contamination in coolant or vice versa

Fix: The DOHC V6 head gaskets fail due to overheating cycles and metallurgy issues. Requires head removal, resurfacing, new gaskets, timing belt replacement while in there. Labor: 14-18 hours for both heads. Often discovered during diagnosis of the piston ring problem.

Estimated cost: $2,200-3,800

Typical onset: 90,000-150,000 mi

Symptoms: Cannot shift into or out of 4WD, Grinding noise from under vehicle, TOD light flashing (if equipped), Whining noise during acceleration, Vibration at highway speeds

Fix: The electric shift motor fails or the internal bearings wear out. Actuator alone is 2-3 hours, but bearing replacement requires transfer case teardown at 8-12 hours. Actuator often tries to engage worn gears causing further damage.

Estimated cost: $450-2,000

Typical onset: 60,000-100,000 mi

Symptoms: Clunking noise over bumps, Steering wander, Uneven tire wear, Vehicle pulls to one side, Play in front wheels when jacked up

Fix: The lower ball joints wear prematurely, especially on vehicles used off-road. Requires replacement of ball joints, alignment. Labor: 3-4 hours for both sides.

Estimated cost: $600-1,000

Typical onset: 80,000-140,000 mi

Symptoms: No start or hard starting, Engine dies while driving, Fuel gauge stuck or erratic, Whining noise from fuel tank, Hesitation or stalling when fuel level is low

Fix: Fuel pump wears out or sending unit corrodes. Requires dropping the fuel tank for access. Labor: 3-4 hours.

Estimated cost: $500-900

Typical onset: 70,000-120,000 mi

Symptoms: Clunk when shifting from Park to Drive or Reverse, Excessive vibration at idle, Visible engine movement in engine bay, Harsh shifting

Fix: The front transmission mount rubber deteriorates and separates. Simple replacement job. Labor: 1.5-2 hours.

Estimated cost: $200-350