1994 TOYOTA PICKUP

Typical onset: 100,000-150,000 mi

Symptoms: white smoke from exhaust, rapid coolant loss with no visible leaks, milky oil on dipstick, overheating under load, rough idle when cold

Fix: Both head gaskets fail simultaneously due to inadequate OEM design. Requires head removal, resurfacing, new gaskets, and timing belt replacement while you're in there. 12-16 labor hours. If overheated badly, heads may be warped beyond machining limits, requiring replacement heads ($800-1,200 used). Many owners just swap in a junkyard engine instead.

Estimated cost: $1,800-3,500

Typical onset: 180,000-250,000 mi

Symptoms: deep knocking sound from bottom of engine, knock worsens with RPM and load, metallic rattling on cold start, loss of oil pressure

Fix: Main and rod bearings wear out from age, poor oil change intervals, or prior overheating damage. If caught early (just rod knock), you can replace rod bearings with crank polish in 8-10 hours. If mains are gone, full teardown required: 20-24 hours for in-frame rebuild or short block swap. Most DIY-ers and shops opt for used engine replacement at this point.

Estimated cost: $2,500-5,000

Typical onset: 120,000-180,000 mi

Symptoms: red fluid dripping near radiator, transmission slipping or delayed engagement, low transmission fluid on dipstick, transmission overheating warning (if equipped)

Fix: Steel cooler lines rust through where they connect to radiator, or internal cooler inside radiator leaks, mixing ATF and coolant (the "strawberry milkshake of death"). External line replacement is 1-2 hours and cheap. Internal leak requires radiator replacement AND full transmission fluid flush, sometimes filter and pan gasket. If coolant got into trans, expect internal damage within 5,000 miles.

Estimated cost: $150-800

Typical onset: 80,000-140,000 mi

Symptoms: loose, wandering steering on highway, clunking over bumps from front end, steering wheel off-center after hitting bumps, tire wear on inside or outside edges

Fix: Idler arm, pitman arm, tie rod ends, and drag link wear out from age and off-road use. Steering becomes vague and dangerous. Replace entire steering linkage as a set for best results: idler arm bracket, pitman arm, inner/outer tie rods, drag link. 3-4 hours plus alignment. Recall on tie rod ends (NHTSA) but doesn't cover all wear items.

Estimated cost: $600-1,200

Typical onset: 100,000-150,000 mi

Symptoms: clunk when shifting from Park to Drive or Reverse, vibration at idle in gear, visible sagging of transmission tailshaft, clunk over bumps from driveline

Fix: Rubber transmission mount deteriorates and collapses, allowing excessive driveline movement. Replacement is straightforward: support transmission with jack, remove 4 bolts, swap mount. 0.8-1.2 hours. Cheap part, easy DIY.

Estimated cost: $120-250

Symptoms: hard starting when hot, sputtering and loss of power under load, stalling at idle after highway driving, long cranking before engine fires

Fix: In-tank fuel pump sock and inline fuel filter clog from rust and sediment in 25-30 year old fuel tanks. Inline filter replacement is 0.5 hours. In-tank pump/sock requires dropping tank: 2-3 hours. If tank is rusty inside, consider replacement or cleaning, otherwise new pump will clog quickly. EFI system is sensitive to fuel pressure.

Estimated cost: $200-600

Symptoms: headlights intermittent or won't turn on, headlights work only on high beam, melted connector at headlight switch, burnt smell from dash

Fix: Headlight switch contacts corrode and overheat due to high current draw through aging wiring. Two NHTSA recalls addressed some headlight issues, but switches still fail. Replacement switch is 1 hour. Check and clean all headlight grounds and connectors. Upgrade to relay harness to prevent recurrence.

Estimated cost: $150-350