Chevrolet Corvette C8

Cast aluminum block, iron cylinder liners, 6.2 liters, pushrod OHV — the final evolution of the small-block V8 concept dating back to 1955. Idles with the classic deep crossplane rumble, gets noticeably louder past 4,000 rpm than the front-engine LT1 predecessor. First base Corvette engine with standard dry sump oiling (three scavenge pumps). AFM cylinder deactivation in cruise. Requires 0W-40 dexos R oil, 7.5 quart capacity. With aftermarket ProCharger P-1SC at 5-6 psi, 670+ hp is realistic on the stock bottom end.

• !! Valve Spring Failure (Manufacturing Defect) from 5,000 km

  Faulty valve springs from supplier batch affect engines built June 1 to September 15, 2020. TSB PIP5752A. Cylinder leakage can lead to engine damage.

  Symptoms: Check engine light, misfires, knocking or ticking
  2,000–8,000 $
  Ad valve spring LT2 6.2GM PIP5752A
• !! AFM Lifter Failure (Cylinder Deactivation) from 100,000 km

  AFM lifters can fail at high mileage. Ticking, misfires, in worst cases camshaft damage. Less common on LT2 than truck V8s.

  Symptoms: Loud ticking at part throttle, misfire on individual cylinders
  1,500–4,000 $
  Ad AFM lifter GM LT2
• ! Oil Consumption Under Track Use

  0.3-0.5 quarts per 300 miles under track conditions. Dry sump keeps oil stable but check before and after every session.

  Symptoms: Oil level drops after track days
  30–100 $
  Ad engine oil 0W-40 dexos R LT2Mobil 1 Supercar 0W-40

+ 4 more engine weaknesses + vehicle weaknesses

Cast aluminum block, iron cylinder liners, 6.2 liters, pushrod OHV — the final evolution of the small-block V8 concept dating back to 1955. Idles with the classic deep crossplane rumble, gets noticeably louder past 4,000 rpm than the front-engine LT1 predecessor. First base Corvette engine with standard dry sump oiling (three scavenge pumps). AFM cylinder deactivation in cruise. Requires 0W-40 dexos R oil, 7.5 quart capacity. With aftermarket ProCharger P-1SC at 5-6 psi, 670+ hp is realistic on the stock bottom end.

• !! Valve Spring Failure (Manufacturing Defect) from 5,000 km

  Faulty valve springs from supplier batch affect engines built June 1 to September 15, 2020. TSB PIP5752A. Cylinder leakage can lead to engine damage.

  Symptoms: Check engine light, misfires, knocking or ticking
  2,000–8,000 $
  Ad valve spring LT2 6.2GM PIP5752A
• !! AFM Lifter Failure (Cylinder Deactivation) from 100,000 km

  AFM lifters can fail at high mileage. Ticking, misfires, in worst cases camshaft damage. Less common on LT2 than truck V8s.

  Symptoms: Loud ticking at part throttle, misfire on individual cylinders
  1,500–4,000 $
  Ad AFM lifter GM LT2
• ! Oil Consumption Under Track Use

  0.3-0.5 quarts per 300 miles under track conditions. Dry sump keeps oil stable but check before and after every session.

  Symptoms: Oil level drops after track days
  30–100 $
  Ad engine oil 0W-40 dexos R LT2Mobil 1 Supercar 0W-40

+ 4 more engine weaknesses + vehicle weaknesses

All-aluminum block, DOHC, 32 valves, flat-plane crankshaft — the first flat-plane V8 in GM's 113-year history. 670 hp naturally aspirated from 5.5 liters, 121.8 hp per liter. At idle, a dry, uneven shaking — flat-plane engines are not happy at 800 rpm. Past 3,000 it spins freely, past 5,000 the sound transforms: the mechanical clatter becomes a high-pitched wail that reviewers universally compare to a Ferrari 458. Not coincidental — the team bought a wrecked 458 from eBay to study the engine. Titanium connecting rods, titanium intake valves, sodium-filled exhaust valves, hollow camshafts, solid lifters. Six-stage dry sump with individual crank bay scavenging, 10-quart capacity. Oil: 5W-50, first change at 7,500 miles. GM limits torque for the first 500 miles, full RPM after 1,500.

• !! Early Engine Failure (Break-In Violation) from 1,000 km

  Documented catastrophic failures under 1,000 miles, all from ignoring break-in procedures. GM electronically limits torque for the first 500 miles. Not a design flaw but operator error.

  Symptoms: Check engine, power loss, metallic noises, engine shutdown
  20,000–40,000 $
  Ad LT6 engine replacement Z06
• !! Two-Piece Exhaust Valves (Long-Term Risk)

  Sodium-filled two-piece exhaust valves — lighter but reminiscent of the C6 Z06 (LS7) valve issues. No mass failures documented yet. Engineers say regular high-RPM use keeps valves healthy.

  Symptoms: No early symptoms; if failure occurs: misfires, compression loss
  5,000–15,000 $
  Ad exhaust valve LT6 Z06
• !! Wrist Pins Without Bronze Bushings (Design Feature)

  Titanium rods use wrist pins without traditional bronze bushings — mass reduction for high-RPM operation. Reminiscent of LS7 issues. No production failures documented yet, community watching skeptically.

  Symptoms: No known early symptoms
  10,000–25,000 $
  Ad wrist pin LT6titanium rod Z06

+ 4 more engine weaknesses + vehicle weaknesses

Same flat-plane architecture as the LT6 but twin-turbocharged with two 76mm BorgWarner ball-bearing turbos and reduced compression (9.8:1 vs 12.5:1). 1,064 hp at 7,000, 828 lb-ft flat from 3,000 to 6,000 rpm. Seven-stage dry sump (extra stage scavenges turbo oil returns), dual injection: port injectors at idle, direct injection driving, all 16 injectors at full throttle. Nimonic exhaust valves (high-nickel superalloy). At full power, burns 7.57 liters of fuel per minute. Hand-built at Bowling Green. Passed GM's 150,000-mile durability test. First customer ZR1 dynoed at 1,028 rwhp.

• !! Recall: Fuel Spill Fire Risk (25V536)

  NHTSA recall for all Z06 (2023-2026) and ZR1 (2025-2026): excess fuel in filler neck can drip onto hot brake rotors or running cooling fans. 25,286 vehicles affected. Stop-sale ordered.

  Symptoms: Fuel smell after filling, visible fuel at filler cap area
  0–0 $
  Ad fuel deflector shield ZR1 Z06
• !! First Model Year — Long-Term Data Missing

  The LT7 passed GM's 150,000-mile durability test and ships with warranty. But 1,064 hp from 5.5 liters creates extreme thermal stress. Fewer than 200 ZR1s delivered. Reliable long-term data doesn't exist yet.

  Symptoms: No known symptoms — too few vehicles for statistically relevant data
  0–30,000 $
  Ad ZR1 maintenance schedule 2025