Kenworth T660 Radiators are a critical part of your truck 's cooling system, helping your engine stay at the right temperature under tough driving conditions. Whether you're pulling heavy loads or logging long highway miles, your radiator works hard to pull heat away from the engine and keep things running smooth and efficient. Radiators work by circulating coolant through a series of tubes and fins that transfer heat away from the engine and out into the air. Without a properly functioning radiator, your engine can overheat fast leading to costly breakdowns or even permanent damage. Our lineup includes high-quality radiator replacements for Kenworth T660, W900B, and W900L models. You ll find options in copper brass, plastic aluminum, and models with built-in oil coolers all built to resist corrosion, handle the heat, and fit like OEM parts. When should you replace your radiator? Watch for signs like coolant leaks, overheating, rusty or clogged fins, or inconsistent engine temperatures. If you 're topping off coolant more than usual, seeing steam under the hood, or noticing fluctuating heat readings on your gauge, it might be time for a new one. Whether you're upgrading or replacing a worn-out unit, these radiators are built tough to handle real-world driving conditions. Get your Kenworth T660 back to peak performance with a cooling system that won t let you down.