Upgrade: Boost an Existing Engine

To enable C32 engine owners to experience the C32B’s benefits, a cylinder head upgrade is an ideal choice. This involves installing new C32B cylinder heads which provide enhanced valve materials, optimized cooling passages, and integrated fuel lines. Vessel operators can choose to upgrade to the C32B cylinder head anytime during planned maintenance or a major overhaul interval.

Cat Reman: Like-New Power

For vessels that are ready for a major overhaul but require a quick return to the water, consider a Cat Reman C32 engine replacement. With this option, the vessel’s existing C32 engine is exchanged for a remanufactured C32 that includes new C32B cylinder heads. The key advantage is speed, as leveraging Cat Reman’s offerings can save up to eight days of maintenance downtime compared to an overhaul. This allows vessel operators to return to the water quickly to resume tow operations.

With core return, this drop-in option delivers like-new performance at a fraction of the cost of new—making it a smart, budget-friendly solution. Vessel operators also receive the benefit of a same-as-new Caterpillar Limited Warranty³. For an operator that demands modern performance with minimal interruption, a Cat Reman C32 with new C32B cylinder heads can be an excellent option.

Repower: Install a New C32B

A full repower – replacing the current engine with a new C32B – equips new and existing vessels with a state-of-the-art engine built for heavy inland service. While a C32B repower may require a larger upfront investment compared to an upgrade or Cat Reman engine, it extends a vessel’s service life and reduces operating costs. Importantly, repowering a towboat with a new C32B ensures the vessel remains U.S. EPA Tier 3 compliant. This helps operators avoid the cost and complexity of Tier 4 aftertreatment systems. A C32B repower prepares a towboat to provide reliable service for decades to come.

Each approach has merit, and a careful balance of budget, time and operational requirements ultimately determines the option that is best for a given vessel. Consult your local Cat dealer for expert guidance.

¹ U.S. Department of Transportation. 2025. "U.S. Transportation Secretary Sean P. Duffy Adds 848 Miles and 14 New Sponsors to U.S. Marine Highway Program." Press release, January. https://www.transportation.gov/briefing-room/us-transportation-secretary-sean-p-duffy-adds-848-miles-and-14-new-sponsors-us-marine.

² Compared to the Cat C32 engine.

³ Warranty can vary by model and application; limitations apply. For complete details about the applicable Caterpillar Limited Warranty, contact an authorized Cat dealer.