Suzuki K14B Specifications
| Engine Model: Suzuki K14B |
| Engine Type: 4-cycle inline 4-cylinder DOHC 16-valve VVT liquid-cooled gasoline |
| Total Displacement: 83.7 cu.in (1.37 L) |
| Rated Engine Power: 92-95 hp (68-70 kW) at 6000 rpm |
| Fuel System Type: Multi-Point Fuel Injection |
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The Suzuki K14B is a 1.4-liter inline 4-cylinder petrol
engine and a core member of the K-series. It is highly regarded for its balance
of fuel efficiency and mid-range torque, making it the workhorse for many of
Suzuki’s mid-sized hatchbacks and compact SUVs globally. The engine represents a
significant evolution in Suzuki’s small-displacement engineering, incorporating
a lightweight all-aluminum construction and a silent timing chain drive that
eliminates routine timing belt replacements.
The long-stroke architecture prioritizes low-end and mid-range torque, which
translates to responsive performance in urban driving conditions. Variable Valve
Timing (VVT) on the intake side further enhances volumetric efficiency across
the engine speed range, contributing to improved fuel economy and reduced
emissions without sacrificing drivability.
Engine Code: K14B.
Type: Inline 4-cylinder, DOHC, 16 valves (4 per cylinder).
Displacement: 1372 cc (83.7 cu.in).
Bore x Stroke: 73.0 mm x 82.0 mm (2.87 in x 3.23 in).
Compression Ratio: 10.0:1 to 11.0:1.
Fuel System: Multi-Point Fuel Injection (MPFI) with sequential injection.
Valvetrain Drive: Silent timing chain.
Variable Valve Timing: VVT system on the intake camshaft.
Maximum Power: 92 hp to 95 hp (68 kW to 70 kW) at 6000 rpm.
Maximum Torque: 130 Nm (96 lb-ft) at 4000 rpm.
Firing Order: 1-3-4-2.
Aspiration: Naturally aspirated.
The cylinder block is manufactured from aluminum alloy
with cast iron cylinder liners. This construction yields a significant reduction
in overall engine mass compared to ferrous block designs, contributing to
improved vehicle fuel economy and weight distribution. The liners are
centrifugally cast during the manufacturing process to ensure uniform material
density and optimal wear characteristics at the piston ring interface.
The bore diameter is machined to 73.0 mm (2.87 in). The block incorporates a
closed-deck design at the upper surface to enhance rigidity around the cylinder
bores, reducing distortion under thermal and mechanical loads. The deep-skirt
design extends below the crankshaft centerline, providing additional structural
support and reducing noise, vibration, and harshness.
The cylinder head is constructed from aluminum alloy
and houses a Double Overhead Camshaft (DOHC) arrangement. The intake camshaft is
equipped with a Variable Valve Timing (VVT) mechanism that adjusts camshaft
phase relative to crankshaft position based on engine operating conditions. The
valvetrain utilizes 16 valves - 8 intake and 8 exhaust - operated by the
camshafts via roller rocker arms. This roller-type valvetrain reduces friction
losses compared to sliding-follower designs.
Valve stem diameters are optimized for reduced mass, allowing for precise valve
control at higher engine speeds. The combustion chambers feature a compact
pent-roof design with centrally positioned spark plugs to promote rapid flame
propagation and efficient thermal efficiency. Hydraulic lash adjusters are not
used; instead, mechanical adjustment with shims or screw-type adjusters is
employed depending on the specific variant.
The fuel system employs Multi-Point Fuel Injection
(MPFI) with sequential injection control. Each cylinder is equipped with a
dedicated fuel injector mounted in the intake manifold runner, positioned to
direct fuel toward the intake valve for optimal atomization and mixture
preparation. The fuel delivery system utilizes an in-tank electric pump that
supplies fuel at a regulated pressure of 3.5 bar to 4.0 bar (51 psi to 58 psi).
The engine control module calculates injection pulse width and timing based on
inputs from the mass airflow sensor, throttle position sensor, coolant
temperature sensor, intake air temperature sensor, and upstream oxygen sensor.
The system operates in closed-loop mode during steady-state cruising to maintain
stoichiometric air-fuel ratio for efficient catalytic converter operation.
The lubrication system is a forced-feed, wet-sump
design featuring a gear-type oil pump mounted to the crankshaft. The pump draws
oil from the sump through a mesh strainer, pressurizes the oil, and routes it
through a full-flow spin-on or cartridge-type oil filter. From the filter, oil
is distributed through galleries to the crankshaft main bearings, connecting rod
bearings, camshaft journals, VVT actuator, and roller rocker arms.
The system incorporates a pressure relief valve that maintains stable oil
pressure across the engine speed range. Piston cooling oil jets are integrated
to direct a spray of oil to the underside of the piston crowns, managing thermal
loads under sustained high-load conditions.
The cooling system is a pressurized, water-cooled
system with a belt-driven water pump. Coolant circulates through the aluminum
cylinder block and cylinder head, extracting heat from the combustion chambers
and moving it to the cross-flow radiator for dissipation. A wax-pellet
thermostat, rated at 82°C to 88°C (180°F to 190°F), controls coolant flow to
maintain consistent operating temperature.
An electric cooling fan, managed by the engine control module based on coolant
temperature sensor input and air conditioning operation, provides supplemental
airflow across the radiator during low-speed operation and stationary idling.
The system includes a coolant recovery reservoir to accommodate thermal
expansion and to allow for easy monitoring of coolant levels.
Timing Drive: The camshafts are driven by a silent
timing chain. The chain incorporates inverted-tooth links that reduce
operational noise compared to conventional roller chains. A hydraulic chain
tensioner, fed by engine oil pressure, maintains optimal chain tension
throughout the engine’s service life. The system does not require periodic
replacement under normal operating conditions.
Variable Valve Timing: The intake camshaft VVT system utilizes an oil-control
valve that directs pressurized oil to advance or retard camshaft timing based on
engine speed, load, and temperature. The system improves low-end torque,
enhances high-end power, and reduces exhaust emissions during warm-up.
Intake System: A composite plastic intake manifold with tuned runner lengths
enhances cylinder filling across the engine speed range. The intake plenum is
designed to reduce pressure pulsations and improve airflow distribution to all
four cylinders.
Exhaust System: A stainless steel exhaust manifold with individual runners
merges into a single outlet to the catalytic converter. The close-coupled
catalytic converter location promotes rapid light-off during cold starts,
reducing cold-start emissions.
Ignition System: A direct ignition system with individual pencil-type ignition
coils mounted over each spark plug eliminates high-tension spark plug wires. The
engine control module controls ignition timing based on a comprehensive set of
inputs including engine speed, load, knock sensor feedback, and coolant
temperature.
Engine Management: A fully programmable electronic control unit manages fuel
delivery, ignition timing, VVT actuation, idle speed control, and evaporative
emission system functions. The system incorporates diagnostic capabilities with
OBD-II compliance.
Engine Weight (dry): 95 kg (209 lb)
Overall Length: 550 mm (21.7 in)
Overall Width: 620 mm (24.4 in)
Overall Height: 680 mm (26.8 in)
Engine Oil Capacity (with filter): 3.1 liters to 3.3
liters (3.3 qt to 3.5 qt)
Recommended Oil Grade: SAE 0W-20 or 5W-30, meeting API SG, SH, SJ, SL, SM, or
SN.
Oil Change Interval: 10,000 km (6,250 miles) under normal driving conditions.
Coolant Capacity: 4.5 liters to 5.0 liters (4.8 qt to 5.3 qt).
Coolant Type: Ethylene glycol-based, silicate-free formulation for aluminum
engine compatibility.
Timing Chain Replacement Interval: Inspection recommended at major service
intervals.
Valve Clearance (Intake): 0.18 mm to 0.22 mm (0.0071 in to 0.0087 in).
Valve Clearance (Exhaust): 0.28 mm to 0.32 mm (0.0110 in to 0.0126 in).
Valve Clearance Inspection Interval: 60,000 km (37,500 miles).
Spark Plug Type: NGK DCPR7E or equivalent.
Spark Plug Gap: 1.0 mm to 1.1 mm (0.039 in to 0.043 in).
Spark Plug Replacement Interval: 40,000 km (25,000 miles) for standard plugs.
Spark Plug Replacement Interval: 100,000 km (62,500 miles) for iridium-tipped
plugs.
Air Filter Element: Replace at 40,000 km (25,000 miles) intervals.
Drive Belt Inspection Interval: 20,000 km (12,500 miles); automatic tensioner
maintains correct tension.
Cylinder Head Bolts (Stage 1): 25 Nm (18 lb-ft)
Cylinder Head Bolts (Stage 2): 50 Nm (37 lb-ft)
Main Bearing Cap Bolts (Stage 1): 20 Nm (15 lb-ft)
Main Bearing Cap Bolts (Stage 2): 40 Nm (30 lb-ft)
Connecting Rod Cap Nuts: 20 Nm (15 lb-ft)
Crankshaft Pulley Bolt: 150 Nm (111 lb-ft)
Camshaft Sprocket Bolts: 65 Nm (48 lb-ft)
VVT Actuator Bolt: 65 Nm (48 lb-ft)
Intake Manifold Nuts and Bolts: 23 Nm (17 lb-ft)
Exhaust Manifold Nuts: 35 Nm (26 lb-ft)
Oil Pan Bolts: 11 Nm (8 lb-ft)
Spark Plugs: 25 Nm (18 lb-ft)
Timing Chain Tensioner Bolts: 11 Nm (8 lb-ft)
Water Pump Bolts: 10 Nm (7 lb-ft)
Suzuki Swift (AZG414 / AZA414 models) - Global markets
(2011-2017).
Suzuki Ertiga (First Generation) - Asian markets, India, and export regions
(2012-2018).
Suzuki Ciaz / Alivio - Asian markets (early models).
Suzuki Baleno - Select export markets.
Suzuki Solio - Japanese Domestic Market (specific variants).
Maruti Suzuki Ertiga - Indian market (2012-2018).
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