Peterbilt 357/378 Radiator Tubes, Gaskets & Hoses

Frequently Asked Questions About Peterbilt 357/378 Radiator Tubes, Gaskets & Hoses

How do I know if a radiator tube, gasket, or hose will fit my Peterbilt 357 or 378?

Fitment depends on your truck's model year, engine, and original radiator configuration, since these components can change across production runs. Check the part number listed on the product page against your existing part or your truck's parts manual, and if you're unsure, have your VIN and engine information ready when reaching out to our team so we can confirm the correct match before you order.

What materials are these radiator tubes, gaskets, and hoses made from?

Radiator tubes are typically constructed from aluminum or brass for durability under constant heat cycling, gaskets are made from rubber or composite materials designed to seal against coolant and vibration, and hoses are made from reinforced rubber built to handle engine bay temperatures and pressure. Specific material details are listed on each individual product page.

What are the signs that my radiator tube, gasket, or hose needs to be replaced?

Common warning signs include visible coolant leaks or residue around the radiator, low coolant levels that require frequent topping off, corrosion or cracking on tubes and hoses, and overheating during normal operation. Catching these issues early can help prevent more extensive cooling system damage or downtime.

Can I install these parts myself, or should I have a mechanic do it?

Many drivers and shop technicians replace radiator tubes, gaskets, and hoses themselves, but the job does require draining the cooling system, removing surrounding components for access, and properly torquing fittings to avoid leaks. If you're comfortable with basic mechanical work and have the right tools, self-installation is doable, but if you're not confident, a qualified diesel mechanic can ensure it's sealed and installed correctly the first time.

Do these parts come with any warranty coverage?

Warranty coverage varies by manufacturer and specific product, so we recommend checking the details listed on each product page before purchasing. If you have questions about warranty terms for a specific part, our customer service team can look up that information for you.