
Industrial-grade chemical cleaning and pressurized flushing remove internal scale, oil residue, and debris. External fin straightening and wash restore airflow.

Comprehensive pressure testing isolates leaks and weak points. Flow checks and visual inspection ensure we find the root cause before repair.

Tank repairs, seam soldering, tube/fin restoration, and full recore options in copper-brass or aluminum. Built to OEM spec or better.

Cleaning, testing, and repair for oil coolers, charge-air coolers, aftercoolers, and plate & shell-and-tube exchangers.

Planned service intervals to extend equipment life and reduce downtime—ideal for fleets and critical-duty assets.

Every unit leaves with a final pressure test, QC checklist, and recommendations to keep cooling performance at its peak.

Box coolers are submerged heat exchangers mounted directly in a ship’s sea chest. Cooling fluid circulates through the cooler’s tubes, while seawater on the outside absorbs the heat. They’re widely used in:
This design makes them efficient, space-saving, and dependable in harsh marine environments.


At Marco Radiator, we provide end-to-end service for plate heat exchangers, including regasketing, cleaning, and supplying new replacement parts. Whether you run Alfa Laval or other major brands, our team ensures your system operates at peak efficiency.

Over time, gaskets lose elasticity, leading to leaks and reduced performance. We provide:

We supply a wide range of replacement materials to keep your heat exchanger running reliably:
With our supplier network and buying power, we provide fast sourcing and competitive pricing for all parts.

To minimize downtime, our technicians can go on-site to:
This saves time, reduces shipping, and gets your system back in service quickly.
📞 Contact Marco Radiator today for plate pack regasketing, cleaning, or replacement parts. From new gaskets to complete plate packs, we have the expertise and materials to keep your heat exchangers operating at their best.

Keel coolers are mounted externally to the hull of a vessel, using seawater to naturally cool the engine’s fluid. Over time, they can suffer from barnacle growth, corrosion, and blockages.

Dura Coolers are air-to-oil or air-to-fluid coolers designed for rugged use in marine, industrial, and off-road environments. They handle high-heat hydraulic, transmission, and engine systems.
Please reach us at marcoofmc@gmail.com if you cannot find an answer to your question.
A: Yes—we supply OEM-quality gaskets, tubes, headers, and full replacement coolers for Keel, Dura, and Fernstrum systems.
A: Yes. We specialize in cleaning, testing, repairing, and replacing Fernstrum coolers, one of the most trusted names in the marine industry.
A: Typically once a year, or more frequently in warm waters prone to heavy marine growth.

Come in today for a FREE quote/estimate on Powder Coating, Exhaust or Radiator work!