Frequently Asked Questions About Freightliner SD 108-122 Radiator Tubes & Hoses

What years and models are these radiator tubes and hoses compatible with?

These radiator tubes and hoses are specifically designed for Freightliner SD models 108 through 122, which includes the SD 108, SD 112, SD 114, and SD 122. They are compatible with model years ranging from 2018 to current production years. However, there can be variations based on engine type (Cummins X15, Detroit DD13/DD15), so always verify your specific engine configuration before ordering. Check your VIN or consult your truck's build sheet to confirm exact fitment.

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

We carry both genuine OEM Freightliner parts and high-quality aftermarket alternatives. OEM hoses typically use EPDM rubber compounds rated for 300-350 degrees Fahrenheit and 50+ PSI pressure ratings. Quality aftermarket options often match these specifications but may cost 30-40% less. The main differences you'll notice are in warranty coverage (OEM usually offers 1-2 years vs 6-12 months for aftermarket) and precise fitment tolerances. For critical cooling system components, many operators prefer OEM for peace of mind.

What are the most common signs that these hoses need replacement?

Look for soft spots, bulging, cracking at connection points, or any signs of coolant seepage around clamps. Most failures occur at the lower radiator hose due to heat cycling and vibration. Industry standard replacement interval is 4-5 years or 400,000-500,000 miles, but inspect them during every PM service. Pay special attention to the molded bends and areas near clamps where stress concentrates. If you notice any coolant residue or white/green crusty deposits, that's a clear indicator of an impending failure.

Can I install these myself, or do I need special tools?

Installation is straightforward for most experienced operators or fleet mechanics. You'll need basic hand tools, proper hose clamps (we recommend constant-torque clamps for commercial applications), and a coolant pressure tester to verify the system after installation. The job typically takes 1-2 hours depending on which hoses you're replacing. The upper hose is usually accessible from above, while the lower hose may require removing the splash shield. Always replace coolant and properly bleed the system to prevent air pockets that can cause overheating.

What's included in a complete hose kit versus individual hoses?

Complete kits typically include upper radiator hose, lower radiator hose, bypass hoses, and all necessary clamps. Some kits also include heater hoses and overflow tank hoses. Individual hoses are available if you only need to replace a specific component. Complete kits offer better value and ensure all hoses are replaced on the same maintenance cycle, which most fleet managers prefer. Kits run approximately $180-$350 depending on whether you choose OEM or aftermarket, while individual hoses range from $45-$120 each.