L18 Chevrolet L18

Великий V8 двигун, що використовується в важких вантажівках і позашляховиках, відомий своєю потужністю і крутним моментом, але має високу витрату пального.

Brand: Chevrolet Type: Petrol Configuration: V8 Production Years: 1970 - 1976 Production: Tonawanda Engine Plant, New York, USA
60 Brand engines
9 Modifications

Technical Specifications

Engine Displacement 8.1 L (7,440 cc)
Configuration V8
Number of Cylinders 8
Valves per Cylinder 2
Power 215 - 275 л.с.
Torque 556 - 624 Н*м
Cylinder Bore 109.70 mm
Piston Stroke 101.60 mm
Compression Ratio 8.5:1
Firing Order 1-8-4-3-6-5-7-2
Fuel System Carburetor
Aspiration Naturally Aspirated
Intercooler No
Maximum RPM 4,600 rpm
Max Torque RPM 2,800 rpm
Valve Train OHV
Timing Drive Chain
Timing Chain Replacement 250000 or as needed
Block Material Cast Iron
Head Material Cast Iron
Engine Weight 318 kg
Dimensions (L×W×H) null mm
Lubrication System Wet sump
Cooling System Liquid cooling

Additional Information

Engine Family Chevrolet Big Block
Manufacturing Plant Tonawanda Engine Plant, New York, USA
Predecessor null
Successor null

Maintenance

Engine Oil Capacity 5.7 L (with filter: 6 L)
Recommended Viscosity 10W-30
Oil Standard API SF
Recommended Brands ACDelco, Valvoline, Pennzoil
Oil Change Interval 5 000 km or 6 mo
Oil Filter PF25
Air Filter A212CW
Replace every 20 000 km
Fuel filter GF432
Spark Plugs Type: Copper
Part number: R44T
Gap: 0.9 mm
Quantity: 8 pcs
Replace every 30 000 km
Coolant Capacity 20 L
Coolant Type IAT (Prestone)
Coolant Change Interval 80 000 km
Thermostat Opening Temperature 88°C
Operating Temperature 90°C
Max Operating Temperature 110°C
Critical Temperature 120°C
Annual Maintenance Cost 500-800 USD

Reliability

Reliability rating: 7/10

Expected lifespan: 250 000 km

Common problems

Problem Severity Mileage Repair cost
Oil leaks from valve covers Medium 100000-150000 km $200-400
Carburetor tuning issues Low 50000-100000 km $100-200

Known defects

  • Weak timing chain tensioner
  • Tendency for valve seat recession

Tuning potential

Tuning potential: Medium | Max. safe power: 450 hp

Stage Power Torque Method Cost
Stage 1 300 hp 650 Nm Carburetor upgrade and ignition tuning
Reliability impact: Minimal 		$1000
Stage 2 350 hp 700 Nm ECU, Performance Exhaust
Required: Performance camshaft, Headers, Exhaust system
Reliability impact: Low 		$3000
Stage 3 400 hp 750 Nm -
Required: High compression pistons, Forged internals, High flow heads
Reliability impact: Medium 		$7000

Popular modifications

  • High-performance intake manifold
  • Electric cooling fans
  • High-output alternator

Tuning limitations

  • Cooling system limitations
  • Fuel delivery system upgrades required for high power

Детальні технічні характеристики

2
модифікацій
325–344
к.с.

Спільні характеристики

Back track width 1676 mm
Boost type none
Capacity 8128 cm3
Car class J
Compression ratio 9.1
Country USA
Cylinder layout V-type
Engine code L18
Engine model L18
Engine placement Front, longitudinal
Engine type Gasoline
Front brakes ventilated disc
Front track width 1651 mm
Injection type distributed injection (multipoint)
Number of cylinders 8
Number of gear 4
Steering wheel position Left
Timing belt OHV
Valves per cylinder 2
Wheelbase 3302 mm

Модифікації двигуна

8.1 AT (325 hp)
Привід All wheel drive (AWD) КПП Automatic Avalanche 1 2001–2006
325 hp
engine
Cylinder bore 107.95 mm
Engine power 325 hp
Fuel tank capacity 117 l
Max power (kW) 239 kW
Max power at RPM 4200 RPM
Maximum torque 597 N*m
Min trunk capacity 1512 l
Stroke cycle 111.0 mm
Turnover of maximum torque 3200 RPM
performance
Acceleration (0-100 km/h) 7.7 s
Max speed 210 km/h
fuel
City driving fuel consumption per 100 km 16.8 l
Fuel 92
Highway driving fuel consumption per 100 km 13.1 l
Mixed driving fuel consumption per 100 km 16.5 l
transmission
Drive wheels All wheel drive (AWD)
Gearbox type Automatic
dimensions
Clearance 224 mm
Curb weight 2883 kg
Full weight 3902 kg
Height 1869 mm
Length 5631 mm
Number of doors 4
Width 2027 mm
suspension
Back suspension Dependent, spring
Front suspension Independent, Torsion
Rear brakes ventilated disc
Wheel size 265/70 R17
other
Body type Pickup
Number of seater 5
Pitch Circle Diameter DIA78.1 6x139.7 mm
8.1 AT 4WD (344 hp)
Привід Rear wheel drive КПП Automatic Suburban 9 2000–2006
344 hp
engine
Cylinder bore 108 mm
Engine power 344 hp
Fuel tank capacity 123 l
Max power (kW) 253 kW
Max power at RPM 4200 RPM
Max trunk capacity 3720 l
Maximum torque 617 N*m
Min trunk capacity 1290 l
Stroke cycle 111 mm
Turnover of maximum torque 3200 RPM
performance
Acceleration (0-100 km/h) 7.9 s
Max speed 196 km/h
fuel
City driving fuel consumption per 100 km 26.0 l
Fuel 95
Highway driving fuel consumption per 100 km 14.0 l
Mixed driving fuel consumption per 100 km 20.0 l
transmission
Drive wheels Rear wheel drive
Gearbox type Automatic
dimensions
Clearance 180 mm
Curb weight 2590 kg
Full weight 3900 kg
Height 1865 mm
Length 5570 mm
Number of doors 5
Width 2002 mm
suspension
Back suspension Independent, spring
Front suspension Independent, spring
Rear brakes Disc
Wheel size 245/75 R16, 265/70 R17
other
Body type Crossover
Disc size 7.5x17 ET31, 7x16 ET31
Number of seater 9
Pitch Circle Diameter DIA78 6x139.7 mm

Cars with the L18 engine

This engine was fitted to 6 models

Photo Brand Model Generation Production years
No photo
 Chevrolet Avalanche Avalanche 2002 - 2013
No photo
 Chevrolet Tahoe Tahoe 2000 - 2006
No photo
 Chevrolet Nova Nova (X-body) 1980 - 1985
No photo
 Datsun Bluebird Bluebird (510) 1965 - 1971
No photo
 Datsun Bluebird Bluebird (610) 1971 - 1976
No photo
 Datsun Violet Violet (A10) 1973 - 1979
No photo
 Nissan Bluebird Bluebird (510) 1971 - 1975

All modifications (9)

Vehicle Generation Modification Power Gearbox Drive
Chevrolet Avalanche Avalanche 8.1L V8 340 л.с. 4-ступ. Автомат 2WD 340 hp 4-ступ. Автомат 2WD
Chevrolet Avalanche Avalanche 8.1L V8 340 л.с. 4-ступ. Автомат 4x4 340 hp 4-ступ. Автомат 4x4
Chevrolet Tahoe Tahoe 8.1 V8 340 л.с. 4-ступ. Автомат 2WD 340 hp 4-ступ. Автомат 2WD
Chevrolet Tahoe Tahoe 8.1 V8 340 л.с. 4-ступ. Автомат 4x4 340 hp 4-ступ. Автомат 4x4
Chevrolet Nova Nova (X-body) Chevrolet Nova 1.8L 4-циліндровий 75 л.с. 4-Автомат 2WD 75 hp 4-Автомат 2WD
Datsun Bluebird Bluebird (510) Datsun 510 1.8L 108 л.с. 5-МКП 2WD 108 hp 5-МКП 2WD
Datsun Bluebird Bluebird (610) Datsun Bluebird 1.8L 4-циліндровий 105 л.с. 5-МКП 2WD 105 hp 5-МКП 2WD
Datsun Violet Violet (A10) 1.8 L 4-циліндровий 110 л.с. 5-Автомат 2WD 110 hp 5-Автомат 2WD
Nissan Bluebird Bluebird (510) 1.8L 4-циліндровий 105 л.с. 5-ступ. механіка 2WD 105 hp 5-ступ. механіка 2WD

Interesting Facts

  • The L18 is part of Chevrolet's Big Block engine family, known for its high torque output.
  • It was commonly used in muscle cars during the 1970s.

Applications

Total produced: null

Vehicle Generation Years Power Markets
Chevrolet Chevelle Second Generation 1970-1973 215hp/275hp USA
Chevrolet Monte Carlo First Generation 1970-1975 215hp/275hp USA

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

Drive types: RWD

Fuel Economy

Fuel Type Petrol 95
Octane Rating Minimum: 91 | Recommended: 95
Consumption (City) 25 L/100km
Consumption (Highway) 15 L/100km
Consumption (Combined) 20 L/100km
Real Consumption 22 L/100km
Fuel Tank Capacity 98 L
Range 490 km
Cost per 100 km 30-40 USD

Emissions Standards

Emission Standard Pre-Euro
CO₂ Emissions 350 g/km
Particulate Filter (DPF) Absent
AdBlue Not Required

Comparison with competitors

Engine Brand Displacement Power Torque
440 Magnum Chrysler 7,206 cc 375 hp 651 Nm
428 Cobra Jet Ford 7,014 cc 335 hp 597 Nm

Pros

  • High torque output
  • Robust construction
  • Good tuning potential

Cons

  • High fuel consumption
  • Heavy weight
  • Outdated technology