1997 LEXUS GS 300

Typical onset: 120,000-180,000 mi

Symptoms: knocking or ticking from lower end at idle, metallic rattle on cold start, oil pressure warning light, sudden loss of power, catastrophic engine seizure

Fix: The 2JZ-GE non-turbo in this era suffers from inadequate oil return holes in the piston oil ring lands, leading to sludge buildup and bearing failure. If caught early (bearing knock), you're looking at rod bearings, main bearings, and crank polishing—8-12 labor hours if no machine work needed. Most cases require short block replacement or full rebuild with updated pistons and rings, 18-25 hours labor. Machine shop costs (boring, honing, balancing) add significantly.

Estimated cost: $4,500-8,500

Typical onset: 90,000-150,000 mi

Symptoms: transmission fluid leaking at radiator area, pink fluid puddle under front of car, transmission overheating, erratic shifting or slipping, milky brown transmission fluid (coolant contamination)

Fix: The steel cooler lines running to the radiator rust through or the crimped fittings fail, dumping ATF. Worse, if coolant mixes into the transmission via a failed internal radiator cooler, the A340E transmission is toast. Replacement involves new cooler lines and external cooler install (radiator cooler delete recommended), 2-3 hours labor. If transmission contaminated, full rebuild or replacement adds 8-12 hours.

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

Typical onset: 80,000-130,000 mi

Symptoms: clunk when shifting from Park to Drive or Reverse, vibration at idle in gear, excessive engine movement on acceleration, harsh shifts

Fix: The rear transmission mount (cross-member mount) deteriorates from age and oil exposure, allowing excessive drivetrain movement. Both engine mounts often need attention at the same time. Rear trans mount replacement is 1.5-2 hours, front engine mounts add another 2-3 hours if doing all three together.

Estimated cost: $450-750

Typical onset: 150,000+ mi

Symptoms: oil seepage at back of cylinder head near firewall, slight coolant smell from engine bay, slow coolant loss without visible external leak, white residue on head/block mating surface

Fix: The 2JZ-GE head gaskets can weep externally as they age, often at the rear near the firewall—hard to see without a mirror. Internal failure (coolant-to-oil) is rare but catastrophic. Both heads require removal, surface inspection, and new OEM gaskets. 10-14 hours labor including timing belt/water pump replacement (mandatory while you're in there). Often discovered during oil leak diagnosis.

Estimated cost: $2,200-3,500

Typical onset: 100,000-160,000 mi

Symptoms: hard starting when hot, hesitation or stumble under load, stalling at idle after highway drive, rough idle, long crank before start

Fix: The inline fuel filter (under intake manifold) clogs gradually; Lexus service interval was 30k but many go 100k+. The in-tank pump strainer sock also degrades, restricting flow. Inline filter replacement is 1.5 hours due to intake plenum removal. Dropping the tank for pump/sock service adds another 2-3 hours. Do both together if symptoms point to fuel delivery.

Estimated cost: $350-650

Typical onset: 120,000+ mi

Symptoms: no-crank after hot shutdown (heat soak), single click when key turned, starts fine when cold, intermittent no-start that resolves after cooling

Fix: The starter sits close to the exhaust manifold and the solenoid contacts wear from heat cycling. Classic symptom: drive 30 minutes, shut off, won't restart for 20 minutes. Starter replacement is 1.5-2 hours from underneath. Rebuild kits available but most replace the unit.

Estimated cost: $450-750