Cummins 4BT complete engine
Cummins 4BT complete engine.
Compact size. Serious work.
Compare the installed cost and suitability, as well as the engine price. A cheaper assembly may require different accessories or additional fitting work.
Find the right Cummins 3.9L replacement.
The 4BT model name is the starting point. Send your equipment make, model and year, together with a clear photograph of the engine identification plate. Include the engine serial number and CPL (Control Parts List) where shown so we can assess the required specification.
Model4BTDisplacement3.9 litresArrangementInline fourFuel / inductionTurbo diesel
| Fitment check | Details to match before ordering |
|---|---|
| Equipment & year | Make, model, build year and original engine application; no universal year-range fitment is claimed. |
| Engine identification | Full model designation, serial number and CPL where available. |
| Output & duty | Advertised 150hp (approximately 112kW). Confirm rated speed, torque and duty against the supplied engine specification; this is not a blanket continuous-duty rating. |
| Mounting & driveline | Engine mounts, sump position, flywheel and flywheel-housing arrangement. |
| Electrical & accessories | 12V electrical specification: confirm starter, alternator, wiring, manifolds and cooling connections. Here, 12V means electrical voltage, not valve count. |
| Supplied components | Confirm the included assembly and any components to transfer in your written quote. |
A 4BT model name alone does not guarantee a direct fit. Check the sump, mounts, flywheel housing, accessories and intended duty. Vehicle conversions also require installer advice on engineering and applicable approvals.
A new engine.
A clearly planned replacement.
Brand new complete engine
- Cummins 4BT 3.9L inline four-cylinder turbo-diesel engine.
- New engine supply rather than a used wrecking-yard motor.
- No core exchange required.
- One-year product warranty under our published terms.
Accessories & installation scope
- Ask for the exact included components and engine configuration.
- Confirm turbocharger, injection equipment, starter, alternator, flywheel and housing requirements.
- Have your installer identify any application-specific parts to transfer.
- Budget separately for fitting, fluids, filters and additional parts.
Product photographs help you compare the layout. They do not replace the written supply specification. Keep your original engine until all required accessories have been checked.
See the Cummins 4BT from every side.
Use these genuine product photographs with your installer when comparing the front drive, flywheel housing and accessory positions. Send matching views of your original engine with your enquiry.
Get the whole installation ready.
Find the original fault
Have a qualified diesel workshop establish why the old engine failed. Resolve related cooling, lubrication or fuel-system problems before fitting the replacement.
Check before fitting
Compare the delivered engine with your agreed specification. Inspect any reused accessories and clean transferred components before assembly.
Follow the correct procedure
Have your installer check valve clearances and follow the engine-specific fitting, priming, commissioning and run-in requirements. Retain installation and service records.
Buying for a workshop or business?
Call for trade pricing before ordering. Humm payment options are available to discuss with our team. Confirm current availability and supply timing before booking the job.
See the business behind your engine
Step inside our warehouse.
Take a look around and see our engine stock and delivery crates for yourself. When you buy a brand new Cummins 4BT, there is an Australian team here to help with your application, the supplied engine and installation planning.
Free standard Australian delivery and a 1-year limited warranty are included under our published terms.
05 / Delivery & peace of mind
From our warehouse.
To your next chapter.
Free standard Australian freight. Tracked delivery. A local team behind your engine purchase.
Delivered Australia-wide.
delivery
For an available engine, allow 1–2 business days for preparation. Confirm the current supply lead time before booking installation. Delivery estimates vary by location and carrier conditions; remote areas may take longer.
Local support. Written cover.
limited warranty
Cover starts when your engine is delivered.
Built around manufacturing quality
Cover for defects in materials and workmanship, including manufacturing faults in the block, head and internal components, subject to the policy.
Coverage & installation essentials
Professional installation and correct run-in are required. The policy excludes normal wear, improper installation, neglect, overheating, lack of lubrication and consequential costs. Read the full terms before installation.
Easy returns
7 days to arrange your return.
Contact us within 7 calendar days of confirmed delivery for an eligible non-warranty return. The engine must be unused, uninstalled and unaltered, with its original packaging intact.
The restocking fee applies to the engine purchase price. You pay return freight, and original shipping costs are deducted from the refund. Returns are inspected before refund approval. Warranty claims follow the separate warranty process.
How delivery works
- Order confirmedYour confirmation arrives by email.
- Prepared in QLDYour engine is packed for freight.
- Track to your doorTracking is emailed at dispatch.
If you need warranty support
- Contact our teamTell us about the issue promptly.
- Guided assessmentWe may request photos or diagnostic reports.
- Next steps agreedIf approved, we arrange inspection and repair or replacement instructions.
Cummins 4BT engine FAQs
Is this a new or reconditioned Cummins 4BT?
This listing is for a brand new 4BT 3.9L turbo-diesel replacement engine. Confirm the supplied configuration and included components in your quote before ordering.
Will it fit any machine with a Cummins 3.9L engine?
Fitment must be checked against the full engine identification and equipment requirements. Send the make, model, year, serial number and CPL where available, plus photographs of the mounts, sump and flywheel housing.
What horsepower does this 4BT produce?
This listing advertises 150hp, approximately 112kW. Confirm the rated operating speed, torque and intended duty with our team. Do not assume that the advertised output is a continuous industrial or generator rating.
What does 12V mean?
12V identifies the electrical system voltage. It does not describe the number of valves. Check your existing starter, alternator and equipment wiring before ordering.
Does it include the turbo, fuel system and electrical accessories?
Confirm each required component in your written quote. Check the turbocharger, injection equipment, starter, alternator, flywheel and housing requirements with our team and your installer.
Do I have to return my old engine?
No core exchange is required. Keep the old engine until your installer has checked whether any application-specific parts need transferring.
How much will the complete replacement cost?
The current engine price appears above. Standard Australian freight is included. Workshop labour, fluids, filters and additional parts are separate; request an itemised fitting quote and read our engine replacement cost guide.
Does the warranty include installation labour?
The included warranty is a one-year product warranty, not a labour warranty. Read the full warranty terms for coverage, exclusions and installation requirements.
Ready for the next step?
Confirm the right engine for your vehicle.
Send engine photos and vehicle details so we can check the configuration, supply list and current lead time.
Reviews
There are no reviews yet.