2002 TOYOTA SUPRA

Typical onset: 60,000-100,000 mi

Symptoms: White smoke from exhaust on cold start, Coolant loss with no visible leaks, Overheating under boost, Milky oil on dipstick or filler cap

Fix: Factory multi-layer steel gaskets fail between cylinders 5-6. Requires full head removal, resurface (usually 0.005-0.010 inch), ARP head studs, and upgraded MLS gasket. 16-20 labor hours including timing belt service while apart. Critical to torque studs in sequence to 80 ft-lbs and retorque after heat cycle.

Estimated cost: $3,500-5,500

Typical onset: 80,000-130,000 mi

Symptoms: Pink fluid pooling under engine, Transmission slipping or delayed engagement, Rapid ATF loss, Coolant smells burnt or looks strawberry-milkshake pink

Fix: Factory crimped cooler lines crack at fittings; ATF mixes with coolant in radiator. If not caught immediately, coolant enters transmission and destroys clutch packs within 50-100 miles. Requires new cooler lines, radiator flush, full ATF drain/refill (or rebuild if contaminated). 3-5 hours if caught early, 18-25 hours if transmission needs rebuild.

Estimated cost: $400-800 (lines only) / $2,800-4,200 (with trans rebuild)

Typical onset: 70,000-110,000 mi

Symptoms: Hesitation or stumble under hard acceleration, Lean fuel trims on scan, No-start after sitting hot, Fuel smell from tank area

Fix: In-tank pump fails from 20+ year old seals and windings; inline filter clogs from tank rust. Pump access requires full tank removal on Supra (no access door). Replace pump assembly, filter, and all rubber fuel lines as preventive. 4-6 hours labor.

Estimated cost: $800-1,400

Typical onset: 100,000-150,000 mi

Symptoms: Blue smoke puff on startup after sitting overnight, Oil consumption 1 qt per 800-1,200 miles, Smoke disappears after 30 seconds of running, Clean compression test results

Fix: Factory Viton seals harden with age and allow oil past guides on deceleration. Requires camshaft removal and valve spring compressor work per cylinder. Can be done with head on car but expect 8-12 hours. Often combined with timing belt service.

Estimated cost: $1,200-2,000

Symptoms: Check engine light with P0715 code, Speedometer bouncing or dead, Transmission stuck in limp mode (3rd gear only), No upshifts past 3rd

Fix: Hall-effect sensor in transmission tail housing fails from heat cycling. Requires pan drop, valve body partial removal to access connector. Dealer-only part originally, aftermarket now available. 2-3 hours labor.

Estimated cost: $400-700

Symptoms: Intermittent check engine lights (random codes), Hard start when hot, Idle surge or stalling, Multiple misfires under load

Fix: Toyota used biodegradable soy-based insulation that cracks and exposes bare wire after 20 years of heat cycles. Affects injector, coil, and sensor circuits. Best fix is complete engine harness replacement or professional re-wrap with adhesive-lined heat shrink. 6-10 hours to remove/reinstall properly.

Estimated cost: $1,200-2,200