Frequently Asked Questions About Freightliner FLT Cabover Radiator Tubes & Hoses

Will these radiator hoses fit my specific year FLT model, and how do I verify compatibility?

Our radiator hoses are designed for Freightliner FLT cabover models from 1984-1991. To ensure proper fit, you'll need to match your engine type (Detroit Diesel, Caterpillar, or Cummins) with the corresponding hose part numbers. Check the radiator inlet/outlet sizes on your truck - most FLTs use either 2" or 2.25" connections. If you're unsure, provide us with your VIN or engine serial number, and we can verify the exact hoses you need.

What's the difference between molded and universal flex hoses, and which should I choose?

Molded hoses are pre-formed to match OEM specifications and provide the best fit with minimal installation adjustments. They're ideal if you want a direct replacement. Universal flex hoses offer more flexibility for custom routing or modified cooling systems but may require additional clamps and careful positioning to avoid kinks. Most customers prefer molded hoses for stock applications, while flex hoses work better for trucks with aftermarket modifications or non-standard radiator setups.

How difficult is the installation, and what tools will I need?

Installation typically takes 1-2 hours for experienced mechanics. You'll need basic hand tools including various sized sockets, pliers for clamp removal, and a coolant drain pan. The main challenge is accessing the lower radiator hose on some FLT models - you may need to remove the lower grille panel or work from underneath. Always replace clamps when installing new hoses, and use a thin layer of coolant on hose ends for easier installation. Expect to add 2-3 gallons of coolant after the job.

What's the typical lifespan of these hoses, and what material holds up best?

Quality EPDM rubber hoses typically last 4-6 years in normal service conditions. Silicone hoses, while more expensive, can last 8-10 years and handle higher temperatures better. The main failure points are usually where hoses connect to fittings due to constant heat cycling. Look for hoses with 4-ply reinforcement for heavy-duty applications. Avoid economy hoses with 2-ply construction as they tend to develop soft spots and fail prematurely, especially on trucks that idle frequently.

Do I need to replace all cooling system hoses at once, or can I do them individually?

While you can replace hoses individually as they fail, we recommend replacing all radiator hoses simultaneously. When one hose shows signs of deterioration, others are usually not far behind. A complete hose kit for FLT cabovers typically includes upper and lower radiator hoses, heater hoses, and bypass hoses. This approach minimizes downtime and prevents roadside failures. Plus, you'll only need to drain and refill the cooling system once, saving time and coolant costs.