2017 CHEVROLET CORVETTE C7 STINGRAY

Typical onset: 60,000-100,000 mi

Symptoms: Ticking or tapping noise from engine, especially on cold start, Check engine light with P0300-series misfire codes or P0521 oil pressure, Loss of power, rough idle, fuel economy drop, Metal shavings in oil filter during oil change

Fix: AFM (Active Fuel Management) lifters collapse, wiping out cam lobes and sending debris through the engine. Proper fix requires cam replacement, all lifters, sometimes valve springs, and AFM delete kit. If caught late, debris damages bearings and you're looking at a full rebuild. 15-25 hours labor depending on extent of damage.

Estimated cost: $3,500-8,000 for cam/lifters; $12,000-18,000 for full rebuild

Typical onset: 50,000-90,000 mi

Symptoms: ATF puddles under car, near front of transmission tunnel, Transmission overheating warnings on track or hot days, Burnt ATF smell, low fluid level on dipstick, Slipping or delayed shifts when fluid is low

Fix: Factory oil cooler lines crack at crimps or rub through on chassis. Requires dropping exhaust and torque tube access for replacement. Upgraded braided lines recommended over OEM. 4-6 hours labor.

Estimated cost: $800-1,500

Typical onset: 70,000-110,000 mi

Symptoms: Clunk or vibration on acceleration or deceleration, Whining or droning noise that changes with speed, not engine RPM, Vibration felt through floor around shifter area, Play or movement in driveshaft when inspected on lift

Fix: Center carrier bearing in the torque tube wears out, sometimes the rubber mounts crack. Requires torque tube removal to replace bearing or entire driveshaft assembly. 5-8 hours labor, more if bolts are seized.

Estimated cost: $1,200-2,200

Typical onset: 60,000-100,000 mi

Symptoms: Clunking noise when shifting, especially into reverse or first, Excessive driveline movement felt through shifter, Vibration during hard launches, Visible cracks or separation in rubber mount during inspection

Fix: Rear transaxle mount degrades from heat and torque load, especially on manual cars driven hard. Replacement requires supporting trans and removing mount bolts. Upgraded polyurethane mounts available. 2-3 hours labor.

Estimated cost: $400-700

Symptoms: Fuel starvation and stumble in high-G corners on track, Check engine light with lean codes (P0171/P0174) during spirited driving, Power loss above 5,000 RPM under sustained load, Improved symptoms with fresh tank of premium fuel

Fix: In-tank fuel filter clogs prematurely if car sees track duty or sits with old fuel. GM revised the filter design in later years. Requires fuel tank drop and pump module removal. 3-4 hours labor.

Estimated cost: $500-900

Typical onset: 80,000-120,000 mi

Symptoms: Rough idle, especially when cold, Hesitation or misfire on light throttle, Reduced power and fuel economy over time, P0300-series codes without AFM lifter noise

Fix: Direct injection means no fuel washing over intake valves—carbon accumulates. Walnut blasting is most effective cleaning method. Requires intake manifold removal. 4-6 hours labor depending on tech experience.

Estimated cost: $600-1,200