OIL COOLER
The PAI 341409 Oil Cooler is engineered for heavy-duty applications with the Caterpillar C13 engine family. It replaces OEM part numbers such as 2775774 and 10R5678, ensuring proper oil-to-coolant heat exchange and reliable engine performance. Available through Wofford Truck Parts, this unit helps maintain optimal oil temperature, better lubrication, and extended engine life under demanding conditions.
$380.07
Specifications
The PAI 341409 Oil Cooler (offered by Wofford Truck Parts) is a direct-fit aftermarket replacement designed for the Caterpillar C13 engine family. According to the manufacturer and part listings, it replaces OEM references 2775774, 277-5774, and 10R5678.
This oil cooler supports the engine’s oil lubrication and cooling system by effectively transferring heat from engine oil to the engine coolant, which is critical in heavy-duty Class 8 truck applications. Proper oil cooler performance ensures the engine oil remains within ideal temperature range, preventing breakdown of lubricant, reducing wear, and extending engine life.
Built by PAI Industries, this cooler is manufactured to heavy-duty standards, comes with a 2-year unlimited-mileage warranty (per vendor listing) and is specifically noted for C13 engine applications. Before installation, verify that your engine is a Cat C13 (or compatible variant) and confirm all connections, flow direction, and mounting match your original cooler.
Compatibility
Peterbilt 379 / 377 / 387 / 389 (heavy tractors) — ~2004–2010
Kenworth W900 / T800 / T660 / T680 (conventionals & heavy tractors) — ~2004–2010
Freightliner Century / Columbia / Coronado / FLD / Cascadia (tractor/head) — ~2003–2010
International / Navistar (9400 / 9200 / 9900 / ProStar) — ~2003–2010
Volvo VN / VNL series (selected configurations) — ~2004–2010
Mack (selected heavy / vocational models) — ~2003–2010
Western Star / Sterling / other vocational chassis — ~2003–2010
Buses, motorcoaches, RV chassis and specialty equipment (coach builders) — ~2003–2012
Alternative Part Numbers
277-5774
2775774