2008 TOYOTA SUPRA

Symptoms: sudden loss of power under boost, metallic knocking from crankcase, oil pressure drop, coolant in oil or vice versa, white/blue smoke from exhaust

Fix: Complete teardown reveals spun rod bearings, cracked ringlands, or blown head gaskets — typical when boost is turned up without proper tuning or fuel system upgrades. Short block replacement runs 25-35 hours, engine rebuild 30-45 hours depending on machine work needed. Parts vary wildly based on OEM vs. forged internals.

Estimated cost: $6,000-15,000

Typical onset: 60,000-100,000 mi

Symptoms: overheating under load, milky oil, external coolant seepage at head/block joint, white exhaust smoke, unexplained coolant loss

Fix: Factory MLS gaskets fail when boost exceeds stock levels or cooling system neglected. Requires cylinder head removal, surface inspection/machining if warped, ARP studs recommended on reinstall. Book time 18-24 hours for I6, less for I4. Always do timing components and water pump while open.

Estimated cost: $3,500-5,500

Typical onset: 80,000-120,000 mi

Symptoms: transmission fluid in coolant (strawberry milkshake in overflow), erratic shifting, slipping under load, overheating transmission

Fix: Internal cooler inside radiator fails, cross-contaminating ATF and coolant — kills transmissions fast. Requires radiator replacement, complete transmission fluid system flush (sometimes external cooler install to prevent repeat), and if caught late, transmission rebuild. Act immediately when coolant looks pink. 8-12 hours labor.

Estimated cost: $1,200-4,500

Symptoms: rod knock (rhythmic metallic tapping that increases with RPM), oil pressure fluctuation, metal shavings in oil filter, sudden engine seizing

Fix: Typically from sustained high RPM, oil starvation during hard cornering, or deferred oil changes on turbo motor. Requires complete bottom-end rebuild or short block replacement. Crankshaft may need grinding or replacement. 30-40 hours for full rebuild with crank work.

Estimated cost: $5,000-12,000

Typical onset: 50,000-90,000 mi

Symptoms: excessive blowby (oil cap pops off at idle), blue smoke on deceleration, loss of compression in one or more cylinders, increased oil consumption, rough idle

Fix: Detonation cracks the thin land between ring grooves, especially on cast pistons with aggressive timing or pump gas on high boost. Requires bore inspection, piston replacement (upgrade to forged recommended), honing, and full ring set. 25-35 hours if caught early; more if cylinder damage present.

Estimated cost: $4,500-9,000

Symptoms: lean AFR readings under WOT, hesitation/stumble at high boost, fuel pressure drop under load, EGT spikes

Fix: Factory fuel filter clogs or pump can't keep up with modified turbo demands. Filter replacement is 1 hour, but if pump inadequate for power level, expect in-tank pump upgrade plus possibly fuel pressure regulator and larger injectors. Tuning required after upgrades. Filter alone is preventive maintenance every 30k.

Estimated cost: $150-2,500

Typical onset: 70,000-110,000 mi

Symptoms: excessive drivetrain clunk on throttle lift/application, vibration at idle in gear, visible sagging of transmission, shifter movement under acceleration

Fix: Rubber deteriorates from heat and age, especially with increased torque. Replacement is straightforward: support transmission, unbolt old mount, install new. Upgraded polyurethane mounts last longer but increase NVH. 1.5-2.5 hours labor.

Estimated cost: $250-600