L34 Pontiac L34

3.4-літровий V6 двигун від Pontiac, відомий своєю потужністю та надійністю, але з проблемами прокладки головки блоку циліндрів.

Brand: Pontiac Type: Petrol Configuration: V8 Production Years: 1970 - 1972 Production: Flint, Michigan, USA
4 Brand engines
22 Modifications

Technical Specifications

Engine Displacement 5.7 L (5,735 cc)
Configuration V8
Number of Cylinders 8
Valves per Cylinder 2
Power 360 - 370 л.с.
Torque 515 - 520 Н*м
Cylinder Bore 101.60 mm
Piston Stroke 88.40 mm
Compression Ratio 10.3:1
Firing Order 1-8-4-3-6-5-7-2
Fuel System Carburetor
Aspiration Naturally Aspirated
Intercooler No
Maximum RPM 5,500 rpm
Max Torque RPM 3,600 rpm
Valve Train OHV
Timing Drive Chain
Timing Chain Replacement при необхідності
Block Material Cast Iron
Head Material Cast Iron
Lubrication System Wet sump
Cooling System Liquid cooling

Additional Information

Engine Family Chevrolet Small-Block
Manufacturing Plant Flint, Michigan, USA

Maintenance

Engine Oil Capacity 4.7 L (with filter: 5 L)
Recommended Viscosity 10W-30
Oil Standard API SJ
Recommended Brands Valvoline, Castrol, Pennzoil
Oil Change Interval 5 000 km or 6 mo
Spark Plugs Type: Copper
Gap: 0.8 mm
Quantity: 8 pcs
Replace every 20 000 km
Coolant Capacity 15 L
Coolant Type Conventional Green (Prestone)
Coolant Change Interval 50 000 km
Thermostat Opening Temperature 88°C
Operating Temperature 90°C
Max Operating Temperature 110°C
Critical Temperature 120°C
Annual Maintenance Cost 300-500 USD

Reliability

Reliability rating: 7/10

Expected lifespan: 200 000 km

Common problems

Problem Severity Mileage Repair cost
Overheating issues Medium 100000-150000 km $300-600

Known defects

  • Oil leaks from valve covers

Tuning potential

Tuning potential: Medium | Max. safe power: 550 hp

Stage Power Torque Method Cost
Stage 1 400 hp 550 Nm Carburetor tuning
Reliability impact: Minimal 		$1000
Stage 2 450 hp 600 Nm -
Required: Performance camshaft, Headers, Exhaust system
Reliability impact: Low 		$3000
Stage 3 500 hp 650 Nm -
Required: High compression pistons, Forged internals, Upgraded carburetor
Reliability impact: Medium-High 		$7000

Popular modifications

  • Cold air intake
  • High-performance ignition system

Tuning limitations

  • Stock internals limit high power applications

Cars with the L34 engine

This engine was fitted to 14 models

Photo Brand Model Generation Production years
No photo
 Chevrolet Venture Venture 1996 - 2005
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 Pontiac Grand AM Grand AM 1998 - 2005
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 Pontiac Montana Montana 1997 - 2005
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 Pontiac Torrent Torrent 2005 - 2009
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 Buick Rendezvous Rendezvous (CUV) 2001 - 2007
No photo
 Chevrolet Alero Alero (A-body) 1999 - 2004
No photo
 Chevrolet Lumina Lumina (N-body) 1989 - 1994
No photo
 Chevrolet Trans Sport Trans Sport (U-platform) 1996 - 2005
No photo
 Oldsmobile Alero Alero (A-body) 1999 - 2004
No photo
 Oldsmobile Cutlass Cutlass (N-Body) 1989 - 1999
No photo
 Oldsmobile Cutlass Supreme Cutlass Supreme (A Body) 1988 - 1997
No photo
 Oldsmobile Silhouette Silhouette (U-body) 1997 - 2004
No photo
 Pontiac Aztek Aztek (U-body) 2001 - 2005
No photo
 Pontiac Trans Sport Trans Sport (U-body) 1997 - 1999

All modifications (22)

Vehicle Generation Modification Power Gearbox Drive
Chevrolet Venture Venture 3.4 V6 185 л.с. 4-ступ. Автомат 2WD 185 hp 4-ступ. Автомат 2WD
Chevrolet Venture Venture 3.4 V6 185 л.с. 4-ступ. Автомат 4x4 185 hp 4-ступ. Автомат 4x4
Pontiac Grand AM Grand AM 3.4L V6 170 л.с. 4-МКП 2WD 170 hp 4-МКП 2WD
Pontiac Grand AM Grand AM 3.4L V6 170 л.с. 5-Автомат 2WD 170 hp 5-Автомат 2WD
Pontiac Montana Montana 3.4 V6 185 л.с. 4-Автомат 2WD 185 hp 4-Автомат 2WD
Pontiac Montana Montana 3.4 V6 185 л.с. 5-Автомат 2WD 185 hp 5-Автомат 2WD
Pontiac Torrent Torrent 3.4L V6 185 л.с. 5-Автомат 2WD 185 hp 5-Автомат 2WD
Pontiac Torrent Torrent 3.4L V6 185 л.с. 5-Автомат 4x4 185 hp 5-Автомат 4x4
Buick Rendezvous Rendezvous (CUV) Buick Rendezvous 3.4L V6 185 л.с. 4-Автомат 2WD 185 hp 4-Автомат 2WD
Chevrolet Alero Alero (A-body) 3.4L V6 170 л.с. 4-Автомат 2WD 170 hp 4-Автомат 2WD
Chevrolet Lumina Lumina (N-body) 3.4 L V6 160 л.с. 4-Автомат 2WD 160 hp 4-Автомат 2WD
Chevrolet Trans Sport Trans Sport (U-platform) 3.4 V6 185 л.с. 4-Автомат 2WD 185 hp 4-Автомат 2WD
Chevrolet Trans Sport Trans Sport (U-platform) 3.4 V6 185 л.с. 5-Автомат 2WD 185 hp 5-Автомат 2WD
Chevrolet Trans Sport Trans Sport (U-platform) 3.4 V6 185 л.с. 4-Автомат 4x4 185 hp 4-Автомат 4x4
Oldsmobile Alero Alero (A-body) 3.4L V6 170 л.с. 4-Автомат 2WD 170 hp 4-Автомат 2WD
Oldsmobile Cutlass Cutlass (N-Body) 3.4L V6 200 л.с. 4-Автомат 2WD 200 hp 4-Автомат 2WD
Oldsmobile Cutlass Supreme Cutlass Supreme (A Body) 3.4L V6 200 л.с. 4-Автомат 2WD 200 hp 4-Автомат 2WD
Oldsmobile Silhouette Silhouette (U-body) 3.4L V6 185 л.с. 4-Автомат 2WD 185 hp 4-Автомат 2WD
Pontiac Aztek Aztek (U-body) 3.4L V6 185 л.с. 4-Автомат 2WD 185 hp 4-Автомат 2WD
Pontiac Aztek Aztek (U-body) 3.4L V6 185 л.с. 5-Автомат 4x4 185 hp 5-Автомат 4x4
Pontiac Trans Sport Trans Sport (U-body) 3.4L V6 185 л.с. 4-Автомат 2WD 185 hp 4-Автомат 2WD
Pontiac Trans Sport Trans Sport (U-body) 3.4L V6 185 л.с. 5-Автомат 2WD 185 hp 5-Автомат 2WD

Interesting Facts

  • The L34 engine was part of the high-performance muscle car era.
  • Known for its strong mid-range torque.

Applications

Vehicle Generation Years Power Markets
Pontiac GTO 2nd Gen 1970-1972 360hp/370hp USA

Compatible transmissions: 4-speed Manual, 3-speed Automatic

Drive types: RWD

Fuel Economy

Fuel Type Petrol 95
Octane Rating Minimum: 91 | Recommended: 95
Consumption (City) 20 L/100km
Consumption (Highway) 13 L/100km
Consumption (Combined) 16.5 L/100km
Real Consumption 18 L/100km
Fuel Tank Capacity 70 L
Range 424 km
Cost per 100 km 25-30 USD

Emissions Standards

Particulate Filter (DPF) Absent
AdBlue Not Required

Comparison with competitors

Engine Brand Displacement Power Torque
L78 Chevrolet 6,997 cc 425 hp 563 Nm

Pros

  • Strong torque output
  • Reliable performance

Cons

  • High fuel consumption
  • Limited tuning potential compared to larger engines