Peterbilt 330/335/337 Radiator Tubes-Gaskets-Hoses

Frequently Asked Questions About Peterbilt 330/335/337 Radiator Tubes-Gaskets-Hoses

What years do these radiator components fit for Peterbilt 330, 335, and 337 models?

Most radiator tubes, gaskets, and hoses in this category are designed to fit Peterbilt 330, 335, and 337 models from 2005 through 2015. However, there can be variations based on engine type (Caterpillar C7, Cummins ISB, or Paccar PX-6/PX-7). Always verify your specific engine model and year before ordering, as radiator configurations changed in 2008 and again in 2011 for certain engine options.

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

We carry both OEM and high-quality aftermarket options. OEM parts guarantee exact fit and factory specifications, while our aftermarket selections from trusted manufacturers like Gates, Dayco, and Continental meet or exceed OEM standards at a lower price point. Aftermarket hoses typically use EPDM rubber compounds rated for -40?F to 257?F, matching OEM temperature ratings. The main difference is price - aftermarket options can save you 30-50% without compromising reliability.

Do I need special tools to replace radiator hoses and tubes on my Peterbilt 330/335/337?

Basic hand tools are sufficient for most hose replacements - you'll need pliers for clamp removal, a flathead screwdriver, and possibly a hose pick tool for stubborn connections. For radiator tubes, you may need a 3/8" and 1/2" socket set. The trickiest part is accessing the lower radiator hose, which requires removing the lower air dam panel (four 10mm bolts). Allow 1-2 hours for a complete hose replacement if you're doing it yourself.

What's the difference between molded and universal flex hoses for these trucks?

Molded hoses are pre-shaped to match your specific radiator and engine configuration, ensuring proper fit without kinking or stress points. They're ideal for upper radiator hoses where precise routing is critical. Universal flex hoses work well for lower radiator connections and coolant bypass lines where some adjustment is beneficial. For Peterbilt 330/335/337 models, we recommend molded hoses for longevity - they typically last 4-5 years versus 2-3 years for universal options in commercial use.

How do I know if I need silicone or standard EPDM rubber hoses?

Standard EPDM rubber hoses work perfectly for most Peterbilt 330/335/337 applications and cost less. Choose silicone hoses if your truck operates in extreme conditions - they handle temperatures up to 350?F and resist oil contamination better. Silicone is particularly recommended for trucks with aftermarket turbo setups, those running in desert climates, or vehicles with frequent extended idle time. While silicone costs 2-3 times more than EPDM, it typically lasts twice as long in severe service conditions.