SDEC 35kW Diesel Engine 4Z3.2-G21

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Bradley: +27 62 743 5089 | bradley@sdecpower.co.za
Ruan: +27 66 511 2009 | ruan@sdecpower.co.za

We offer industry leading 24 month / 1,000 hour warranties on our engines and diesel generators.

The SDEC 35kW Diesel Engine (4Z3.2-G21) is a responsive 3.2L turbocharged engine built for light industrial, commercial backup, and small pump systems. It is a preferred choice for 31kVA to 34.5kVA generators, offering a great power to weight ratio for small to mid-sized business setups.

  • Power Output: Delivers 35kW standby power at 1500 RPM (50Hz), adjusting quickly when equipment switches on.
  • Turbocharged Design: Features an inline 4-cylinder layout with a turbocharger for extra responsiveness without adding unnecessary bulk.
  • Reliable Cooling: Uses a wet-liner block design that keeps temperatures steady under local South African and regional African conditions.
  • Support & Delivery: Backed by The Generator King with technical help, fast cross-border shipping, and a ready stock of genuine OEM parts.

We offer delivery across Sub-Saharan Africa at the best prices.

RELIABLE POWER GENERATION

SDEC was founded in 1947 and is a diesel engine manufacturer. They are ISO9001, QS9000 and TS16949 certified, which is testament to their quality and reliability.

GENERAL SPECIFICATIONS

SDEC 24kW Diesel Engine

Responsive Turbocharged Performance

The SDEC 4Z3.2-G21 engine uses forced induction to squeeze excellent efficiency out of its 3.2L displacement. The built in turbocharger gives this 4-cylinder engine the extra muscle needed to handle sudden jumps in electrical load, making it a reliable choice for situations that cannot afford voltage drops when equipment or appliances switch on.

Smart Cooling for Local Conditions

Equipped with an integrated wet-liner block, this engine easily handles the everyday demands of South African and regional African off-grid setups. By keeping cooling fluid in direct contact with the cylinder walls, the design prevents hotspots during long runs, reduces internal friction, and keeps your long-term maintenance costs down.

Strong Build and Efficient 4-Valve Design

Constructed with a high strength cast iron block and an integrated cylinder head, this engine handles daily workloads easily.

It features an advanced four-valve layout that improves airflow, optimises fuel efficiency, and delivers excellent torque. This makes it a great choice for local generator builders and engineers who need reliable power for small businesses, farms, and light industrial setups.

The straightforward mechanical layout reduces maintenance guesswork and keeps your equipment running smoothly.

Key Technical Features

  • Efficient Valve Layout: The four-valve design improves fuel combustion, maximising energy output while extending the overall working life of the engine.

  • Precision Manufacturing: Built under strict SAIC Motor quality controls and verified by German automotive production standards for excellent consistency and performance.

  • All-Weather Starting: Starts up instantly without a pre-heater in temperatures down to -10°C, and handles extreme cold down to -30°C when paired with an auxiliary heater.

  • Clean Burning: Complies with Off-Road Stage II emission standards, ensuring highly efficient fuel consumption and a cleaner burn.

PRODUCT SPECIFICATIONS

Weight 260 kg
Dimensions 95.3 × 52.2 × 72.8 cm
Brand

SDEC

Product Type

Diesel Engine

Prime Power (kW)

32kW

Standby Power(kW)

35kW

Prime Power

31kVA

Standby Power

34.5kVA

Engine Type

In-line, 4 Strokes, 4 Valves, Water-cooled

Aspiration

Turbo Charged

Cylinder Type

Dry Liner

Cylinders

4 Cylinders

Bore × Stroke

98mm x 105mm

Displacement

3.2L

Compression Ratio

18 : 1

Firing Order

1-3-4-2

Injection Timing

14° – 17°

Flywheel Housing (SAE)

SAE NO.4

Flywheel Clutch Size (Inches)

SAE NO.7.5 (gear tooth number:115)

Fuel Consumption @ 100%

8.6 l/h

Fuel Consumption @ 75%

6.5 l/h

Fuel Consumption @ 50%

4.4 l/h

Fuel Consumption @ 25%

2.6 l/h

Injection Pump

KangDa

Governor

Electronic Regulator

Feed Pump

Mechanical Type

Injection Nozzle

Multi hole Type

Opening Pressure

24MPa

Fuel Filter

Full Flow, Cartridge Type

Fuel Type

Diesel Fuel Oil

Mechanism Type

Overhead Valve

Number of Valves

Intake: 1, Exhuast: 1 Per Cylinder

Valve Lashes - Cold

Intake: 0.35mm, Exhaust: 0.45mm

Lubrication Method

Fully Forced Pressure Feed Type

Oil Pump

Gear Type Driven by Crankshaft

Oil Filter

Full Flow, Cartridge Type

Oil Pan Capacity

High Level: 7 litres, Low Level: 6 litres

Lubrication Angularity Limit

Front Down: 25 degrees, Front Up: 35 degrees, Side to Side: 35 degrees

Lubrication Oil

Refer to Operation Manual

Intake Valve Timing

Opening: 15°BTDC, Closing: 30°ABDC

Exhaust Valve Timing

Opening: 45°BBDC, Closing: 13°ATDC

Cooling Method

Fresh Water Forced Circulation

Water Capacity (Engine Only)

5.75 litres

Lid Minimum Pressure

70kPa

Water Pump

Centrifugal Type Driven by Belt

Water Pump Capacity

155L/min

Thermostat

Wax–pellet Type. Opening Temp. 72°C, Full Open Temp. 82°C

Cooling Fan

Plastic Blower. 450 mm diameter, 7 blades

Heat Rejection to Coolant

3.5 kcal/sec

Air Flow

3.4m3/min

Exhaust Gas Flow

9.2m3/min

Exhaust Gas Temperature

550 °C

Maximum Permissible Altitude

2000 m

Charging Generator

14V×35A

Voltage Regulator

Built-in IC Regulator

Starting Motor

12V×3.8kW

Battery Voltage

12V

Battery Capacity

120 AH

Category:
A partner in power generation

World-Class Manufacturing, Fast Regional Distribution

We source and manufacture high-quality generators, engines, and parts directly from leading global factories, including SDEC. By dealing with us directly, you cut out the middlemen, saving you time and money.

Every engine, alternator, and spare part we supply is built to international standards and fully tested to handle South African conditions. Whether you are a local generator builder looking for loose components or a business needing a complete commercial power setup, we ensure fast delivery, guaranteed stock availability, and dependable performance.

SDEC FACTORY | ROBOTIC ENGINE MANUFACTURING ASSEMBLY LINE

Our Delivery Channels

Sub-Saharan Logistics

We ship SDEC engines, diesel generators, alternators and parts throughout South Africa and across the continent, including Namibia, Botswana, Malawi, Mozambique, Zambia, Zimbabwe, Swaziland, and Lesotho.

Our team handles the entire logistics process, from factory  loading to cross-border transport, ensuring your equipment arrives safely and on time.

We hold a large volume of stock and genuine replacement parts at our warehouses so we can supply clients across Africa quickly and efficiently.

FREQUENTLY ASKED QUESTIONS

Does the price include installation?

No, installation is not included in the price. Any qualified electrician can install the kit and provide a Certificate of Compliance (COC) for the installation as per legislation.

Do you offer installation?

No, we do not offer any installation services, but, any qualified electrician can install our products.

Does the price include delivery?

Delivery is not included in any of the prices. However, delivery will be calculated in your cart at checkout based on your location and product selection.

Tell me about the Warranty

Our product warranty is detailed on each product page and as per our standard terms along with a valid COC. It is a limited warranty.

Price validity

All pricing is valid while stocks last as reflected on your quotation, as specified therein.Â