1994 ISUZU PICKUP

Typical onset: 80,000-140,000 mi

Symptoms: White smoke from exhaust, Coolant loss with no visible leaks, Overheating under load, Milky oil on dipstick or cap, Hard starting when warm

Fix: Requires cylinder head removal, resurfacing, and new gaskets. Budget 12-16 hours labor for V6, 8-12 for the four-cylinder. Often find warped heads requiring machining. Smart shops replace timing components and water pump while in there.

Estimated cost: $1,800-3,200

Typical onset: 90,000-150,000 mi

Symptoms: Transmission fluid puddle under front of truck, Burnt transmission smell, Slipping or delayed engagement after fluid loss, Corroded steel lines at radiator connection

Fix: Steel cooler lines rust through where they connect to radiator or run along frame. Requires replacement of lines and often the cooler itself if internal contamination occurred. 3-5 hours labor plus full fluid flush if caught early. If trans ran low, expect internal damage.

Estimated cost: $400-800 (lines only), $2,000-3,500 (if transmission damaged)

Typical onset: 100,000-160,000 mi

Symptoms: Severe vibration at idle, Serpentine belt throwing or shredding, Visible wobble of crank pulley, Rubber layer separating from outer ring, Check engine light with crank position sensor codes

Fix: The rubber bonding layer fails, allowing outer ring to wobble or separate. Requires harmonic balancer puller and installer tools. 2-4 hours labor depending on accessibility and whether you need to drop the crossmember. Don't ignore this—a thrown balancer destroys the radiator and front end.

Estimated cost: $350-650

Typical onset: 120,000-180,000 mi

Symptoms: Clutch slipping under load, Chattering on engagement, Hard shifting or grinding into gear, Pedal staying on floor, Burning smell during normal driving

Fix: Clutch kits last reasonably well, but when they go, the flywheel often needs resurfacing due to heat checking or grooves. Hydraulic slave cylinder failure is also common. Full job is 6-8 hours: transmission out, clutch kit, resurface flywheel, replace slave cylinder and throwout bearing.

Estimated cost: $900-1,500

Typical onset: 100,000-140,000 mi

Symptoms: Rattling noise on cold start that fades, Check engine light with timing-related codes, Loss of power and rough idle, Metal shavings in oil

Fix: The 2.6L uses a timing chain with guides and tensioners that wear. Chain stretch causes timing drift and potential valve contact. Requires front cover removal, timing set replacement, and new guides. Often done during head gasket job. 8-12 hours standalone.

Estimated cost: $1,200-2,000

Typical onset: 80,000-120,000 mi

Symptoms: Clunking when shifting or accelerating, Excessive driveline vibration, Visible sagging of transmission tailshaft, Shifter feels loose or notchy

Fix: Rubber mounts crack and collapse, especially the rear transmission mount. Simple job: 1-2 hours with transmission jack to support while swapping. Often all mounts are done at once since labor is minimal once you're under there.

Estimated cost: $200-400

Symptoms: Hard starting, especially when hot, Stalling or dying under load, Sputtering at highway speed, Won't restart until it cools down

Fix: Steel fuel tanks rust internally on aged trucks, sending debris through the system. Fuel filter clogs repeatedly. Real fix requires tank removal, cleaning or replacement, new pump, filter, and injector service. Just replacing the filter is 0.5-1 hour but doesn't solve root cause.

Estimated cost: $150-300 (filter only), $800-1,400 (full fuel system service)