Renault B4DA Specifications
| Engine Model: Renault B4DA |
| Engine Type: 4-cycle inline 3-cylinder SOHC 12-valve liquid-cooled gasoline |
| Total Displacement: 61.0 cu.in (0.99 L) |
| Rated Engine Power: 69-72 Hp (51-53 kW) at 6500 rpm |
| Fuel System Type: Sequential multi-point electronic fuel injection (MPI) |
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The Renault B4DA is a 1.0-liter,
three-cylinder, naturally aspirated petrol engine. This modern, compact
power unit is part of Renault's global small-displacement strategy.
Designed primarily for compact city vehicles and emerging markets, it
prioritizes fuel efficiency, low operating costs, and minimal physical
dimensions. The engine uses a 12-valve, single overhead camshaft (SOHC)
configuration.
A defining feature is the integration of advanced technologies such as a
Stop and Start system and optimized thermal management to reduce fuel
consumption and emissions. The design philosophy centers on delivering a
robust torque curve at low to medium engine speeds, providing responsive
performance in urban driving conditions.
Engine Type: In-line three-cylinder, petrol, SOHC
Displacement: 999 cc (61.0 cubic inches)
Bore: 71.0 mm (2.795 inches)
Stroke: 84.1 mm (3.311 inches)
Compression Ratio: 11.0:1 (varies by specific application)
Firing Order: 1-2-3. Cylinder Numbering (from timing end): 1-2-3
Maximum Power Output: 51-53 kW (69-72 Hp) at 6250-6500 rpm
Maximum Torque: 91-96 Nm (67-71 lb-ft) at 3500-4250 rpm
Fuel Type: Unleaded gasoline, 95 RON minimum
Oil Quality Specification: Renault RN17 (0W-20) or equivalent API SP/SN,
ACEA C5
Engine Oil Capacity (including filter): 3.0 liters (3.17 US quarts)
(approximate)
Coolant Capacity (total system): Approximately 4.2 liters (4.44 US
quarts)
The cylinder block is an aluminum alloy structure with cast iron
cylinder liners, achieving a balance between reduced weight and
long-term durability. It houses a three-main-bearing crankshaft. To
improve refinement and counteract inherent three-cylinder vibrations,
the engine incorporates an unbalanced mass on the crankshaft. Connecting
rods are forged steel with replaceable bearing shells. Pistons are
aluminum alloy, designed for high compression and are fitted with three
rings (two compression, one oil control).
The cylinder head is an aluminum alloy casting with a single overhead
camshaft (SOHC) design. The camshaft is chain-driven, offering long
service life without scheduled replacement intervals. The valve train
operates four valves per cylinder (12 valves total) via rocker arms.
Hydraulic lash adjusters are employed, ensuring zero maintenance for
valve clearance. Valve seat inserts and guides are installed for
durability. The cylinder head is engineered to promote efficient
combustion and facilitate rapid engine warm-up.
The engine uses a sequential multipoint electronic fuel injection (MPI)
system, managed by a dedicated Engine Control Unit (ECU). The ECU
processes inputs from a comprehensive sensor suite, including a mass air
flow sensor, throttle position sensor, dual oxygen sensors (pre- and
post-catalytic converter), and knock sensors. Fuel is delivered via
three injectors mounted on an intake manifold runner for each cylinder.
The throttle body is electronically controlled (drive-by-wire) for
precise air management.
Lubrication is provided by a variable-displacement oil pump. This pump
adjusts its pressure output based on engine demand, reducing parasitic
loss and improving overall efficiency. The system is a full-pressure
design, with oil fed to the crankshaft main bearings, connecting rod
bearings, camshaft bearings, and valve train components. An integrated
oil cooler helps maintain optimal oil temperature. The oil filter
housing uses a cartridge-type design.
A belt-driven water pump circulates coolant. The system utilizes an
electronically controlled thermostat for precise thermal management,
enabling faster engine warm-up to reduce friction and emissions. A
crossflow radiator is standard, coupled with an electric cooling fan
controlled by the ECU. The cooling circuit is designed to manage heat in
the cylinder head and block effectively, contributing to engine
longevity and stable combustion.
Ignition System - A distributorless coil-on-plug ignition system is
used. Each cylinder has its own individual ignition coil mounted
directly on the spark plug. This system allows for precise, independent
ignition timing control for each cylinder by the ECU, optimizing
performance and fuel economy. Spark plugs are long-life iridium type.
Intake and Exhaust System - The intake manifold is a composite plastic
design with optimized runner lengths for torque development. The exhaust
manifold is a compact, cast iron unit, integrated with the catalytic
converter in some applications to form a close-coupled exhaust system
for rapid catalyst light-off and reduced emissions. The exhaust system
includes a main catalytic converter and a secondary silencer.
Engine Stopand and Start System - A key feature of the Smart Control
efficiency package. The system automatically shuts off the engine when
the vehicle is stationary and restarts it instantly when the driver
engages the clutch (manual transmission) or releases the brake
(automatic transmission). This operation is facilitated by a reinforced
starter motor, a specific battery, and dedicated engine management
software.
Length (excluding transmission): 450 mm (17.72 inches)
Width (at cylinder head): 600 mm (23.62 inches)
Height (from sump to cylinder head): 650 mm (25.59 inches)
Dry Weight (without fluids or accessories): 75 kg (165 lbs)
Engine Oil and Filter Change: 10000 km (6215 miles) or 12 months
Air Filter Element Inspection/Replacement: 20000-30000 km (12430-18640
miles)
Spark Plug Replacement: 60000 km (37280 miles)
Timing Chain: No scheduled replacement; inspect per service schedule
Coolant Replacement: 120000 km (74560 miles) or 60 months
Engine Oil Grade: SAE 0W-20, low-ash, meeting Renault RN17 specification
Cooling Fluid: Specific organic acid technology (OAT) coolant, meeting
Renault Type D specification
All torque values are for clean and unlubricated threads unless
otherwise stated.
Cylinder Head Bolts: Torque-to-yield, single-use bolts. Tighten in
sequence.
Stage 1: 40 Nm (30 lb-ft)
Stage 2: Tighten an additional 180 deg rotation
Main Bearing Cap Bolts: 60 Nm (44 lb-ft) plus an additional 45 deg
rotation
Connecting Rod Cap Bolts: 25 Nm (18 lb-ft) plus an additional 90 deg
rotation
Spark Plugs: 20-25 Nm (15-18 lb-ft)
Oil Drain Plug: 25 Nm (18 lb-ft)
Oil Filter Cartridge Housing Cap: 25 Nm (18 lb-ft)
Camshaft Sprocket Bolt: 90 Nm (66 lb-ft)
Crankshaft Pulley Bolt: 130 Nm (96 lb-ft)
The Renault B4DA engine is installed in the
following vehicles:
Renault Kwid (various years and markets)
Renault Triber
Renault Kiger
Nissan Magnite (rebadged sibling vehicle)
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