Cooling
Cummins QSB Aftercooler Rebuild
Full aftercooler strip, clean, inspection, and reassembly. Includes raw water pump rebuild, gearbox oil cooler re-solder, and fuel cooler re-solder — all pressure verified.
Marine cooling · Manly, Brisbane
Marine Aftercooler Servicing & Repairs in Brisbane
Seadog Marine services marine diesel aftercoolers from our Manly, Brisbane workshop. Our work includes cleaning, core inspection, pressure testing and rebuilds, with real Cummins aftercooler projects available to view.
Workshop
Manly, Brisbane
Service area
Brisbane & South East Queensland
Approach
Inspect · explain · repair
The service
Good cooling work starts with finding the real cause.
Clear findings and practical options, grounded in the condition of your component and the wider system.
An aftercooler cools the intake air after it has been compressed by the turbocharger. Its role is different from the engine's main heat exchanger, but it is another important part of the marine diesel cooling system. Fouling, corrosion and failed seals need careful inspection.
We assess core condition, air-side contamination, salt deposits, sealing faces, fasteners and connections. Cleaning and pressure testing help establish whether a service, repair or rebuild is appropriate for the component's condition.
Our documented Cummins QSB projects include a full aftercooler strip, clean, inspection and reassembly, and a QSB 5.9 aftercooler rebuild with a newly manufactured core. We serve Brisbane, Moreton Bay and South East Queensland; send your engine model and symptoms to discuss the work needed.
Workshop scope
Work included
- Aftercooler core inspection and cleaning
- Air-side contamination and restriction checks
- Corrosion and salt build-up assessment
- Seals, O-rings and gasket-face inspection
- Pressure testing and leak-point assessment
- Reassembly checks and rebuild advice
What to look out for
Common symptoms
These signs can point to a cooling fault. Inspection helps identify the cause.
- Loss of engine power
- Cooling performance concerns
- Corrosion or weeping around the component
- Higher exhaust gas temperature where monitored
- Unknown or overdue aftercooler service history
From the workshop
Real jobs. Real components.
Examples of the hands-on work behind this service.
Cooling
Cummins QSB 5.9 Aftercooler — New Core & Rebuild
New aftercooler core manufactured and full aftercooler rebuild completed.
Straight answers
Questions vessel owners ask.
Share what you know about the engine and the problem. We can help work out the next step.
Are an aftercooler and a heat exchanger the same thing?
Both transfer heat, but an aftercooler cools the turbocharged intake air while the main engine heat exchanger cools the engine's coolant circuit. The components need different inspection and servicing attention.
Do you rebuild Cummins marine aftercoolers?
Our gallery includes Cummins QSB aftercooler rebuild work, including a QSB 5.9 unit with a newly manufactured core. Contact us with your model and component details so we can assess your specific job.
Can cleaning alone resolve an aftercooler problem?
Cleaning can address fouling, but it will not repair a damaged core, corrosion or failed seals. Inspection and testing are needed to establish the appropriate work.
What information helps with an aftercooler estimate?
Send the engine make and model, photos, service history if available and the symptoms you have noticed. Let us know the vessel's location and access arrangements.
Talk through your cooling issue
Start with the details you have.
Tell us the engine model, symptoms and vessel location. We’ll discuss an appropriate next step.