Suzuki 1.6 DDiS Specifications
| Engine Model: Suzuki 1.6 DDiS |
| Engine Type: 4-cycle 4-cylinder DOHC 16-valve turbocharged liquid-cooled diesel |
| Total Displacement: 97.5 cu.in (1.59 L) |
| Rated Engine Power: 120 Hp (88 kW) at 3750 rpm |
| Fuel System Type: Common rail direct injection |
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The Suzuki 1.6 DDiS (Diesel Direct injection
Suzuki) is a modern, 1.6-liter, inline-four-cylinder, dual overhead
camshaft (DOHC), 16-valve, turbocharged common-rail diesel engine. It is
the badge given to the Fiat-sourced 1.6 Multijet engine used in Suzuki
vehicles during the 2010s. This engine represents Suzuki's primary
modern diesel offering for compact passenger cars and SUVs, designed to
meet strict Euro 5 and Euro 6 emission standards while delivering strong
performance and excellent fuel economy.
Key features include a Variable Geometry Turbocharger (VGT), a
high-pressure common-rail injection system with multiple injections per
cycle, and comprehensive after-treatment including a Diesel Particulate
Filter (DPF). In later Euro 6 iterations, it also incorporates Selective
Catalytic Reduction (SCR/AdBlue). The 1.6 DDiS is characterized by its
robust low-end and mid-range torque, making it well-suited for urban
driving and motorway cruising in vehicles like the SX4 S-Cross and
Vitara.
While offering good refinement for its class, it requires adherence to
specific maintenance routines, particularly concerning its emission
control systems. It is a competent, efficient, and modern workhorse
engine that served Suzuki's European diesel strategy.
Engine Family / Model: Fiat 1.6 Multijet, Suzuki badged as 1.6 DDiS.
Engine Type: Inline-four cylinder, transversely front-mounted,
four-stroke cycle, water-cooled, turbocharged and intercooled diesel
engine.
Fuel Management: High-pressure Common Rail Direct Injection (Multijet).
Aspiration: Forced induction via a Variable Geometry Turbocharger (VGT)
and an air-to-air intercooler.
Bore: 79.5 mm / 3.130 inches. Stroke: 80.5 mm / 3.169 inches.
Displacement: 1,598 cc / 97.5 cubic inches.
Compression Ratio: 16.5 : 1. Firing Order: 1-3-4-2.
Rotation Direction (from front/timing belt end): Clockwise.
Maximum Power Output (EC): Euro 5 Version: 88 kW (120 Hp) at 3,750 rpm.
Euro 6 Version (with SCR): 88 kW (120 PS) at 3,750 rpm, with optimized
emissions.
Maximum Torque: 320 Nm (236 lb-ft) at 1,750 rpm.
Idle Speed: 800 rpm. Fuel System Pressure: Up to 1,600 bar (23,206 psi).
Fuel Requirement: Ultra-low sulfur diesel (EN 590).
Emissions Compliance: Euro 5 (DPF+EGR) and Euro 6 (DPF+EGR+SCR/AdBlue).
Construction: Cast iron, with a compact and rigid deep-skirt design.
Engineered for durability and low noise, vibration, and harshness (NVH).
Cylinder Bores: High-precision machined parent bore in the cast iron
block. No separate liners.
Crankshaft: Forged steel or high-strength cast iron, supported by five
main bearings. Designed to handle high low-end torque. Main Bearings:
Steel-backed, aluminum alloy shell bearings.
Pistons: aluminum alloy with a specially shaped, re-entrant combustion
bowl optimized for the Multijet injection spray pattern. Features
internal cooling galleries.
Connecting Rods: Forged steel with fracture-split big end caps for
precise bearing alignment.
Oil Pan: Stamped steel or composite plastic.
Construction: aluminum alloy, cross-flow design.
Valve Arrangement: Dual Overhead Camshafts (DOHC), driven by a toothed
timing belt. Four valves per cylinder (16-valve total).
Valvetrain: Direct-acting with hydraulic lash adjusters (HLAs) and
roller finger followers. Maintenance-free valve clearance adjustment.
Combustion Chamber: Direct injection type, primarily formed in the
piston crown. The cylinder head face is flat. Valve Seat Angle: 45 deg.
Valve Diameter: Intake: 29.0 mm (1.142 inches). Exhaust: 26.0 mm (1.024
inches).
Valve Springs: Single coil springs.
Valve Clearance: Hydraulically compensated; no adjustment required.
Camshaft Drive: Toothed rubber timing belt with an automatic hydraulic
tensioner and idler pulleys.
Injection System: Bosch or Delphi Common Rail with Multijet sequential
multi-injection capability. Allows for multiple pilot, main, and post
injections for noise reduction, efficiency, and DPF regeneration.
High-Pressure Pump: Cam-driven radial piston pump.
Common Rail: High-pressure fuel accumulator rail.
Injectors: Solenoid-controlled injectors (some versions may use
piezoelectric for even finer control).
Turbocharger: Variable Geometry Turbocharger (VGT) with electronic
actuator. Provides rapid spool-up from low RPM and maintains boost
across a wide range.
Intercooler: Front-mounted air-to-air intercooler.
Glow Plugs: Quick-start ceramic glow plugs with integrated pressure
sensor (some versions) for precise combustion monitoring.
Type: Full-pressure, force-fed wet-sump system.
Oil Pump: Internal gear (trochoid) type, chain-driven from the
crankshaft.
Oil Filter: Cartridge-type paper element in a housing.
Oil Cooler: Engine oil cooler (oil-to-coolant) is standard.
Oil Capacity (including filter): 4.5 liters (4.8 US quarts / 4.0
Imperial quarts).
Recommended Oil Grade: Mandatory: Low-ash, full synthetic oil meeting
ACEA C2 or C3 specification. Viscosity: SAE 5W-30 or 0W-30. Using
incorrect oil will lead to DPF clogging and potential failure. Operating
Oil Pressure: The operating range: 200-400 kPa (2.0-4.0 bar / 29-58
psi).
Type: Pressurized, forced circulation system with a dual-circuit cooling
system for the EGR cooler.
Water Pump: Centrifugal, belt-driven from the timing belt.
Thermostat: Electronically controlled thermostat for optimized warm-up
and emissions.
Radiator Pressure Cap: 140-160 kPa (1.4-1.6 bar / 20-23 psi).
Coolant Capacity (engine + radiator, approx.): 6.5 liters (6.9 US quarts
/ 5.7 Imperial quarts).
Coolant Recommendation: Ethylene-glycol based, silicate-free coolant
meeting Fiat/Suzuki specification (e.g., Paraflu UP).
Electrical System: 12-volt DC, negative ground.
Engine Control Unit (ECU): Advanced Bosch or Magneti Marelli ECU
integrating control of fuel injection, turbo VGT, EGR, and all
after-treatment systems.
Emission Controls: Exhaust Gas Recirculation (EGR): Cooled,
high-pressure and low-pressure loop system. Diesel Oxidation Catalyst
(DOC): Oxidizes carbon monoxide and hydrocarbons.
Diesel Particulate Filter (DPF): Wall-flow filter that traps soot.
Requires periodic active regeneration (raising exhaust temperature via
late post-injection) to burn off soot.
Selective Catalytic Reduction (SCR): On Euro 6 models, uses an AdBlue
(aqueous urea) injection system to significantly reduce NOx emissions.
Sensors: Comprehensive array including rail pressure, boost pressure,
manifold pressure/temperature, DPF differential pressure, NOx sensor
(SCR), and particulate matter sensor.
Length (from front of pulley to rear of block): 550 mm (21.7 inches).
Width (over valve cover): 650 mm (25.6 inches).
Height (from oil pan sump to top of intake manifold): 650 mm (25.6
inches).
Dry Weight (engine only, complete): 135-145 kg (298-320 lbs).
Engine Oil and Filter Change Interval: Every 20,000-30,000 km
(12,400-18,600 miles) or 12 months under long-life schedule. Must use
prescribed ACEA C2/C3 low-ash oil. For severe use (short trips), reduce
interval to 15,000 km. Fuel Filter: Replace every 30,000 km (18,600
miles) or as indicated. Has a water sensor; drain if warned. Timing Belt
and Components: Replace every 120,000-160,000 km (75,000-100,000 miles)
or 5 years. Follow manufacturer's strict interval. Air Filter: Replace
every 60,000 km (37,000 miles) or as needed. Coolant Replacement: Every
5 years or 160,000 km (100,000 miles).
DPF Regeneration: Automatic during sustained highway driving. Avoid
frequent very short trips. If DPF warning light illuminates, a forced
highway drive or dealer regeneration is required. AdBlue Tank (Euro 6
SCR models): Refill as indicated by the dashboard warning (every
10,000-15,000 km). Use only certified AdBlue fluid. EGR System
Maintenance: Intake manifold and EGR valve carbon buildup is common.
Professional cleaning may be required every 80,000-120,000 km to
maintain performance.
Cylinder Head Bolts: Torque-to-Yield (TTY). New bolts required. The
Procedure: Step 1: 40 Nm (30 lb-ft). Step 2: +90 deg. Step 3: Loosen
completely. Step 4: 40 Nm (30 lb-ft). Step 5: +90 deg. Follow exact
factory sequence.
Main Bearing Cap Bolts: 80-85 Nm (59-63 lb-ft) + 60-degree turn.
Connecting Rod Cap Bolts: 50-55 Nm (37-41 lb-ft) + 60-degree turn. New
bolts required.
Crankshaft Pulley Bolt: 200-220 Nm (148-162 lb-ft) + angle.
Camshaft Sprocket Bolts: 60-70 Nm (44-52 lb-ft).
Glow Plugs: 15-20 Nm (11-15 lb-ft).
Fuel Injector Clamp Bolt: 8-10 Nm (5.9-7.4 lb-ft).
Oil Pan Bolts: 10-15 Nm (7-11 lb-ft).
Valve Cover Bolts: 8-10 Nm (6-7 lb-ft).
Intake Manifold Bolts: 20-25 Nm (15-18 lb-ft).
Exhaust Manifold Nuts: 25-30 Nm (18-22 lb-ft).
The Suzuki 1.6 DDiS engine was exclusively used in the following Suzuki
models for the European and other diesel-oriented markets: Suzuki SX4
S-Cross (Second Generation, JY) (2013–2018): Offered as the diesel
option across various trim levels, often paired with ALLGRIP all-wheel
drive. Suzuki Vitara (Fourth Generation, LY) (2015–2018): The sole
diesel engine option for the new Vitara, available with manual or
automatic transmission and ALLGRIP.
This engine is a rebadged Fiat 1.6 16v Multijet. Its application in
Suzukis was a result of the strategic partnership between the two
companies. Suzuki did not develop its own modern small diesel, instead
sourcing this proven unit from Fiat Powertrain Technologies (FPT).
Production for Suzuki applications likely ceased by 2018-2019 as the
model range was updated and market demand for small diesel passenger
cars declined rapidly in Europe. It remains a key powerplant for these
specific model years.
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