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▷▷ 2021 ▷ Nissan L18 Specifications and review, service data

2 julio, 2021

Nissan L18 Single Carburetor Engine

the Nissan / Datsun L18 It is a 1.8-liter (1,770 cc, 108.01 cu in) four-stroke, in-line four-cylinder carbureted gasoline engine from the Nissan L family. The Nissan L18 engine produced from 1972 to 1976. The Nissan-Datsun L18 engine features OHC valves, wedge-shaped combustion chamber, aluminum cylinder head, and fully balanced five-bearing crankshaft to produce smooth, reliable power. The L18 engine uses eight counterweights. The cylinder block is cast into a single unit, with deep skirting. The engine is equipped with a 2-cylinder downdraft carburetor. The L18 engine with double SU carburettor was also available, it was called the L18T. This engine had higher compression pistons, lower volume combustion chambers, higher compression ratio, higher power output and torque. The L18 engine has a cylinder bore of 85.0 mm (3.35 in) and a piston stroke of 78.0 mm (3.07 in) with a compression ratio of 8.5: 1. Produced 105 PS (103 HP, 77 kW) at 6,000 rpm and 147 Nm (15.0 kgm, 108 lbft) at 3,600 rpm. The engine code breakdown is as follows:

  • L – Engine family
  • sixteen – 1.8 liter displacement

General information: nissan l18

Motor specs
Engine code L18
Design Four stroke, Inline-4 (Straight-4)
Fuel type Gasoline
Displacement 1.8 liters, 1,770 cm3 (108.017 cubic inches)
Fuel system Simple carburetor
Power adder None
Max. horsepower 105 PS (103 HP, 77 kW) @ 6,000 rpm
Max. torque 147 Nm (15.0 kgm, 108 lbft) at 3,600 rpm
Order to open fire 1-3-4-2
Dimensions (L x H x W):

Cylindrical block: l18 motor

The Nissan L18 engine has a cast iron cylinder block. The cylinder block, which has a special one-piece cast iron structure, adopts the five-bearing support system. The cylinder bores are surrounded by cooling jackets and machined directly into the block. The oil passages in the block are arranged so that the full flow oil filter is connected directly to the right side of the block. The cylinder bore of the Nissan L16 engine is 85.0mm (3.35 inches) and the piston stroke is 78.0mm (3.07 inches), the compression ratio is 8.5: 1 The crankshaft is a special steel forging. Fully balanced, it delivers smooth, reliable power at high speed. The main bearings obtain lubrication from the pumped oil through the main oil gallery and the oil holes that run in parallel with the cylinder holes. The pistons are made of special cast aluminum with struts to control thermal expansion and have two compression rings and a combined oil ring. The piston pin is a special hollow steel shaft. Fully fits the piston and snaps into the connecting rods. The connecting rods are made of special forged steel.

Cylindrical block
Cylinder Block Alloy Molten iron
Compression ratio: 8.5: 1
Cylinder bore: 85.0 mm (3.35 inches)
Piston stroke: 78.0 mm (3.07 inches)
Number of piston rings (compression / oil): 2/1
Number of main bearings: 5
Cylinder bore (standard): 85,000 mm (3,346 in)
Piston Skirt Diameter (Standard): 84.985-85.035 mm (3.3459-3.3478 inches)
Piston Pin Outside Diameter: 20.995-21.000 mm (0.8266-0.8268 inch)
Piston ring side clearance: Top 0.045-0.080 mm (0.0018-0.0031 inch)
Second 0.030-0.070 mm (0.0012-0.0028 inch)
Piston Ring End Gap: Top 0.35-0.55 mm (0.0138-0.0217 inch)
Second 0.30-0.50 mm (0.0118-0.0197 inches)
Petroleum 0.30-0.90 mm (0.012-0.035 inch)
Connecting rod center distance: 130.35 mm (5.24 inches)
Crankshaft journal diameter: 54.942-54.955 mm (2.1631-2.1336 inches)
Crankpin diameter: 49.961-49.974 mm (1.9670-1.9675 inches)
Crankshaft Center Distance: 39.00 mm (1.5354 inches)

Cylinder head: datsun l18 engine data sheet

The cylinder head is made of light and strong aluminum alloy with good cooling efficiency; contains wedge-type combustion chambers. A special aluminum bronze valve seat is used in the intake valve, while a heat resistant steel valve seat is installed in the exhaust valve. All of these parts are hot press fit. The camshaft is made of special cast iron and is located inside the rocker cover. Four aluminum alloy brackets hold the camshaft. The camshaft bearings are lubricated with the oil holes leading to the main oil gallery of the …

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