Oil Cooler for Caterpillar 3406 / C Series Engines – Part# 7C3039

High-quality Oil Cooler designed for Caterpillar 3406, C15, and C16 diesel engines. Engineered as a direct-fit replacement for OEM part number 7C3039, this oil cooler maintains proper engine oil temperature, helping to prevent overheating and extend component life in heavy-duty applications.

Built to match or exceed original specifications, this engine oil cooler features high-efficiency cooling fins and a durable core that withstands extreme working conditions. Whether you’re performing a full engine rebuild or routine maintenance, this cooler is a critical component to keep your CAT engine running strong under load.

Key Features:

• Direct Replacement for Caterpillar OE#0R5511, 0R5601, 0R9056, 133-0125, 1330125, 299-1996, 2991996, 2W1008, 2Y8928, 4N0619, 4W6039, 6N0169, 6N8856, 7C3039, 7W2164

• Compatible with Caterpillar 3406, 3406B, 3406C, 3406E, C15, and C16 engines

• Heavy-duty construction ensures efficient heat transfer and extended service life

• Corrosion-resistant materials for long-term reliability

• Helps maintain optimal oil viscosity and reduce wear on internal components

Fitment & Compatibility:

• Caterpillar 3406 Series (All Variants)

• CAT 3406B / 3406C / 3406E

• CAT C15 & CAT C16 Diesel Engines

• Perfect for on-highway trucks, industrial, marine, and construction applications

Cross Reference Part Numbers:

• CAT 7C3039, 0R5511, 0R5601, 0R9056, 133-0125, 1330125, 299-1996, 2991996, 2W1008, 2Y8928, 4N0619, 4W6039, 6N0169, 6N8856, 7C3039, 7W2164

• Also compatible with select aftermarket and OEM rebuild kits

Why Replace Your Oil Cooler?

Over time, oil coolers can become clogged or corroded, restricting flow and reducing heat exchange efficiency. A failing cooler can cause elevated oil temperatures, leading to engine wear or failure. Replacing it with a durable, high-performance aftermarket cooler ensures your engine operates at peak efficiency and remains protected under heavy workloads.