1987 CHEVROLET BERETTA

2.8L V6FWDAUTOMATICgas
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5-Year Cost of Ownership
$28,609 maintenance + known platform issues
~$5,722/yr · 480¢/mile equivalent · $6,324 maintenance + $6,585 expected platform issues
Compare this engine
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2.2L I4
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2.3L I4 Quad 4
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3.1L V6
Common Problems & Known Issues

The 1987 Beretta with the 2.8L V6 is a first-year GM L-body with typical late-80s build quality issues. Engine longevity problems dominate the repair landscape, particularly head gasket failures and bottom-end wear that often leads to complete rebuilds.

2.8L V6 Head Gasket Failure

Common · high severity
Typical onset: 80,000-120,000 mi
Symptoms: White smoke from exhaust, Coolant loss with no visible leaks, Oil milkshake on dipstick, Overheating, Rough idle when cold
Fix: Both head gaskets typically fail together on this engine. Requires cylinder head removal, resurfacing heads (usually warped), new gaskets, timing components, and coolant system flush. 12-16 hours labor. Often uncovers additional problems like cracked heads.
Estimated cost: $1,800-2,800

Crankshaft and Main Bearing Wear Leading to Engine Rebuild

Common · high severity
Typical onset: 100,000-150,000 mi
Symptoms: Heavy knocking from bottom end, Low oil pressure at idle, Metallic rattle on cold start, Oil consumption increases dramatically, Metal shavings in oil
Fix: The 2.8L V6 suffers from inadequate oiling to main bearings under sustained highway use. Once bearing wear starts, it cascades quickly. Full rebuild includes crankshaft machining/replacement, all bearings, piston rings, gaskets, timing components. 20-28 hours labor. Many opt for long block replacement instead.
Estimated cost: $3,500-5,500

Automatic Transmission (THM 125C) Failure

Common · high severity
Typical onset: 90,000-130,000 mi
Symptoms: Slipping between 2nd and 3rd gear, Delayed engagement when cold, No reverse or weak reverse, Whining noise in gear, Shuddering during acceleration
Fix: The transverse 3-speed automatic behind the 2.8L is notoriously weak. Internal clutch pack wear and valve body issues are typical. Rebuild requires 10-14 hours including R&R. Transmission mounts also commonly fail, causing harsh shifting and clunking.
Estimated cost: $1,800-2,600

Fuel System Degradation

Occasional · medium severity
Typical onset: any mileage (age-related)
Symptoms: Hard starting when hot, Stalling at idle, Loss of power under load, Fuel smell in cabin, Check engine light for lean condition
Fix: Age-related fuel system issues include failing in-tank pump, clogged filter (often overlooked), deteriorated fuel lines, and leaking injectors. Pump replacement requires tank drop, 3-4 hours. Filter is inline and straightforward, 0.5 hours. Lines often crack at connections.
Estimated cost: $400-900

Engine Mount Collapse

Occasional · medium severity
Typical onset: 70,000-110,000 mi
Symptoms: Excessive engine movement on acceleration, Clunking when shifting into gear, Vibration through steering wheel, Engine visibly tilts in bay
Fix: The hydraulic engine mounts fail, allowing excessive drivetrain movement that stresses transmission mounts and halfshaft boots. Front mount is 2-3 hours, transmission mount is 1.5-2 hours. Usually need to replace multiple mounts simultaneously.
Estimated cost: $350-650

Intake Manifold Gasket Leaks

Occasional · medium severity
Typical onset: 60,000-100,000 mi
Symptoms: Coolant seepage at manifold edges, Rough idle and stumbling, Coolant smell but no obvious leak, White residue around intake ports
Fix: The 2.8L uses composite intake gaskets that deteriorate and allow coolant and vacuum leaks. Requires intake removal, gasket replacement, possible manifold resurfacing. 6-8 hours labor. Often done preventively when doing head gaskets.
Estimated cost: $700-1,200
Owner tips
  • Change coolant every 24 months religiously—the 2.8L V6 is extremely sensitive to cooling system neglect
  • Use quality oil and 3,000-mile intervals; this engine has marginal oiling design
  • Replace transmission fluid and filter every 30,000 miles to extend THM 125C life
  • Inspect fuel lines annually—they become brittle and crack at age 30+ years
  • Budget for a full engine rebuild or replacement if buying over 100,000 miles
Only buy if you're getting it cheap and can wrench yourself—these need frequent, expensive engine work that quickly exceeds the car's value at shop rates.
AI-assisted summary drawn from NHTSA recall data, our labor-times database, and platform knowledge. Not a substitute for a pre-purchase inspection on a specific vehicle.
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