Peterbilt 375/377 Radiator Tubes, Gaskets & Hoses

Frequently Asked Questions About Peterbilt 375/377 Radiator Tubes, Gaskets & Hoses

Will these radiator tubes, gaskets, and hoses fit my specific Peterbilt 375 or 377 model year?

Radiator components can vary depending on the engine option and production year of your truck, even within the 375/377 model lines. Always check the fitment details listed on each product page and compare part numbers with your truck's cooling system before ordering. If you are unsure, our parts specialists can help confirm compatibility using your VIN or existing part numbers.

How do I know if I need a replacement tube, gasket, or hose versus a full radiator repair?

Common signs that point to a specific component failure include visible coolant leaks at a particular seam or connection, corrosion around a gasket surface, or a hose that has become cracked, soft, or bulging. If the leak is isolated to one area rather than the entire radiator core, replacing the individual tube, gasket, or hose is often a more cost-effective fix than replacing the whole radiator.

What material should I choose for radiator hoses and gaskets in this category?

Radiator hoses are typically offered in reinforced rubber designed to handle engine heat and coolant pressure, while gaskets are commonly made from materials like rubber or composite fiber to create a durable seal. Choosing OEM-style or OEM-matching materials helps ensure a proper seal and long-term durability under normal operating conditions.

Can I install these radiator tubes, gaskets, and hoses myself, or should I have a professional do it?

Many drivers and shop technicians with mechanical experience are able to replace radiator hoses and gaskets themselves, as the process generally involves draining coolant, removing the old component, and installing the new one with proper torque on clamps or fasteners. However, if you are replacing internal radiator tubes or dealing with a more involved repair, having a qualified diesel technician handle the job can help avoid installation errors that lead to leaks or overheating.

How often should radiator hoses and gaskets be inspected or replaced on a Peterbilt 375/377?

It is a good practice to visually inspect radiator hoses and gaskets during routine maintenance intervals, checking for cracking, softness, discoloration, or seepage around connection points. Because usage, mileage, and operating conditions vary widely between trucks, there is no single fixed replacement interval, so following your fleet's maintenance schedule and addressing any signs of wear promptly is the best approach.