1996 ISUZU RODEO

Typical onset: 80,000-140,000 mi

Symptoms: Excessive oil consumption (1 qt per 500-1000 miles), Blue smoke on startup or acceleration, Loss of compression in cylinders 2, 4, or 6 (passenger side), Low oil pressure warning at idle, Rough idle and misfires that worsen over time

Fix: The 3.2L DOHC V6 has weak piston ring tension and thin cylinder wall coatings that wear through prematurely. Once oil burning starts, it accelerates until rod bearings starve and spin, or pistons score through the nikasil coating. You're looking at either full engine rebuild (pistons, rings, hone cylinders, rod bearings, main bearings — 25-35 hours labor) or used engine swap (12-16 hours). Rebuilds often fail again within 50k because the core problem is design, not maintenance.

Estimated cost: $3,500-6,500

Typical onset: 90,000-150,000 mi

Symptoms: Pink or red fluid dripping near radiator, Transmission slipping in 2nd or 3rd gear, Delayed engagement when shifting to Drive, Milky transmission fluid (coolant contamination), Overheat light with normal coolant level

Fix: Steel cooler lines rust through where they pass near the frame, leaking ATF. Worse: the integrated cooler in the radiator fails internally, allowing coolant into the trans and ATF into the coolant ("strawberry milkshake of death"). Once contaminated, the transmission is junk — friction material swells and clutches glaze. Fix requires radiator replacement, all cooler lines, trans flush if caught early, or full rebuild/replacement if contaminated (18-22 hours). Many shops recommend external auxiliary cooler and bypass radiator cooler entirely.

Estimated cost: $2,200-4,800

Typical onset: 100,000-160,000 mi

Symptoms: Overheating with no visible coolant leak, White smoke from exhaust (not just condensation), Bubbles in coolant reservoir when running, Oil cap shows milky residue, Rough idle and misfire codes on adjacent cylinders

Fix: The thin head gaskets blow between cylinders or into coolant passages, often on the passenger-side head first. DOHC setup makes this job expensive — cams must come out, timing chains reset, valves checked for warp. Both heads usually done at once because labor overlap. 20-26 hours including machine shop time to check for warp and resurface. Often discover cracked head during disassembly, adding $800-1200 for replacement casting.

Estimated cost: $2,800-4,200

Typical onset: 85,000-130,000 mi

Symptoms: No-start condition with cranking but no fire, Stumbling or surging at highway speed, Loses power going uphill, Check engine light with lean fuel codes, Whining noise from rear when key turned to ON

Fix: In-tank pump fails from running on low fuel (common owner habit) or from clogged fuel filter restricting flow and overworking motor. Filter is inline under chassis, rusts to frame and breaks during removal. Pump replacement requires dropping 20-gallon plastic tank (2.5-3.5 hours). Always replace filter, strainer, and pump together. If filter was neglected, flush lines and check injectors for varnish.

Estimated cost: $650-950

Typical onset: 70,000-120,000 mi

Symptoms: Clunk when shifting from Park to Drive or Reverse, Vibration at idle in gear that disappears in Neutral, Visible sag of transmission tailshaft, Exhaust rattles against crossmember

Fix: Rear transmission mount rubber deteriorates and the metal bracket cracks where welded to crossmember. Trans drops 1-2 inches, stressing cooler lines and driveshaft. Simple replacement (1.5-2 hours) but inspect crossmember for rust-through — common in salt states and requires welding or crossmember replacement (adds 4-6 hours).

Estimated cost: $280-500

Symptoms: Intermittent stalling at idle or when coming to stop, Surging idle between 500-1200 RPM, Check engine light with TPS code or idle control code, Transmission shifts erratically

Fix: TPS develops dead spots in the potentiometer track, sending bad voltage signals to ECU. Causes idle control and transmission shift logic to go haywire. Simple bolt-on replacement (0.5 hours) but requires TPS relearn procedure. Often misdiagnosed as idle air control valve or MAF sensor first.

Estimated cost: $220-350