1998 LOTUS ELISE

Typical onset: 40,000-80,000 mi

Symptoms: White smoke from exhaust, Coolant loss with no visible leaks, Overheating under load, Mayonnaise-like residue under oil cap, Rough idle or misfires

Fix: Head gasket replacement requires pulling the engine from the clamshell, stripping the head, surface inspection, and reassembly. Budget 12-16 hours labor. Many shops recommend full head rebuild with valve work and ARP studs while you're in there to prevent repeat failure.

Estimated cost: $2,800-4,500

Typical onset: 60,000-100,000 mi

Symptoms: Recurring head gasket failure despite correct repair, Compression loss in one or more cylinders, Coolant mixing with oil, Metal debris in coolant, Sudden loss of power

Fix: The K-series aluminum block can develop micro-cracks or the wet liners can slip down, breaking the head gasket seal. Requires full short block replacement or engine swap. Engine out, full teardown, and either machine work with liner pinning (10-14 hours) or replacement short block install (16-20 hours). Many owners opt for upgraded Toyota 2ZZ swap at this point.

Estimated cost: $4,500-8,000

Typical onset: 70,000-120,000 mi

Symptoms: Knocking or ticking on cold start that fades when warm, Metallic rattling under acceleration, Low oil pressure warning, Metal shavings in oil filter, Catastrophic engine failure if ignored

Fix: K-series bearings wear prematurely, especially if oil change intervals were stretched or wrong oil used. Engine must come out, full teardown to crankshaft, measure journals, replace bearings (sometimes need crank grinding). 14-18 hours labor. Often discovered during head gasket job, turning it into a full rebuild.

Estimated cost: $3,500-6,000

Typical onset: 50,000-90,000 mi

Symptoms: Transmission whine or noise, Difficulty shifting into gear, Visible oil leak from bell housing area, Excessive transmission movement felt through shifter, Burning smell after spirited driving

Fix: The transmission oil cooler can crack or leak, and the rear engine mount (which also supports the gearbox) fatigues. Oil cooler replacement requires dropping the subframe (6-8 hours). Mount replacement is 3-4 hours. Both are common preventive maintenance on high-mileage examples.

Estimated cost: $800-1,800

Typical onset: 80,000-150,000 mi

Symptoms: Hard starting when hot, Rough running or hesitation, Fuel smell in cabin or engine bay, Check engine light with fuel trim codes, Stalling after warmup

Fix: Fuel filter clogging, fuel pump wear, and deteriorating fuel lines are typical on 25+ year old cars. Filter replacement is easy (1 hour), but if pump or lines need work, the clamshell comes off for access (add 4-6 hours). Ethanol fuel accelerates rubber line degradation.

Estimated cost: $300-1,200

Symptoms: Spiderweb cracks around rear hatch hinges, Stress cracks near suspension mounting points, Creaking noises from body, Faded or chalky fiberglass finish

Fix: The fiberglass clamshell flexes and develops stress cracks over time, especially if the car has been tracked. Cosmetic repair involves grinding, filling, and repainting (4-8 hours depending on extent). Structural cracks near suspension mounts need reinforcement. Not a breakdown issue but affects value and weather sealing.

Estimated cost: $600-2,500