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

What years do these radiator tubes and hoses fit for Peterbilt 375 and 377 models?

Our radiator tubes, gaskets, and hoses are designed to fit Peterbilt 375 models from 1987-2007 and Peterbilt 377 models from 1988-2000. However, compatibility can vary based on your specific engine configuration (CAT 3406, Cummins ISX, Detroit Series 60, etc.). We recommend checking your existing part numbers or contacting our support team with your VIN to ensure proper fitment before ordering.

Are these aftermarket or OEM parts, and what's the quality difference?

We carry both OEM and high-quality aftermarket options. Our aftermarket radiator hoses are made from EPDM rubber with 4-ply reinforcement, meeting or exceeding OEM specifications. The aftermarket tubes are constructed from aluminized steel or stainless steel, providing excellent corrosion resistance. Many customers report our aftermarket options lasting just as long as OEM parts at a fraction of the cost. All gaskets use automotive-grade materials that maintain proper seal under extreme temperatures.

Do I need special tools to replace radiator hoses and tubes on my Peterbilt 375/377?

Basic hand tools are typically sufficient for most radiator hose replacements - you'll need screwdrivers for clamps, pliers, and possibly a hose pick for stubborn connections. For radiator tubes, you may need a socket set and potentially a tube cutter if modifications are required. The most challenging part is usually accessing tight spaces near the firewall. We recommend having a coolant catch pan, new coolant, and fresh clamps on hand. Installation typically takes 1-3 hours depending on which components you're replacing.

What's the difference between silicone and rubber radiator hoses for my truck?

Rubber EPDM hoses are the standard choice and work well for most applications, typically lasting 4-5 years with proper maintenance. Silicone hoses cost more upfront but offer superior heat resistance (up to 500?F vs 257?F for rubber), better flexibility in cold weather, and can last 10+ years. Silicone hoses also maintain their shape better under vacuum and are available in multiple colors. For trucks operating in extreme temperatures or those wanting maximum longevity, silicone is worth the investment.

How do I know when it's time to replace my radiator hoses and gaskets?

Inspect your hoses every oil change for signs of wear. Replace immediately if you notice: soft or spongy spots when squeezed, cracks or splits in the rubber, bulging areas, coolant residue around connections, or if hoses feel rock-hard. Gaskets should be replaced whenever you disconnect a component or notice coolant seepage. As preventive maintenance, we recommend replacing rubber hoses every 4-5 years and checking tube connections for corrosion annually. Don't wait for a roadside failure - these are inexpensive parts that can prevent costly engine damage.