Frequently Asked Questions About Freightliner Columbia 112/120 Fan Blades & Shrouds

Will these fan blades and shrouds fit my specific Columbia model year?

Our fan blades and shrouds are designed to fit Freightliner Columbia 112 and 120 models from 2001-2017. However, compatibility can vary based on your engine type (Detroit, Caterpillar, or Cummins) and radiator configuration. We recommend checking your current fan blade part number or contacting us with your VIN to ensure proper fitment. Note that some 2015-2017 models may have different mounting configurations that require specific shroud brackets.

What's the difference between plastic and metal fan blades, and which should I choose?

Plastic (composite) fan blades are lighter weight, which reduces stress on the fan clutch and improves fuel efficiency. They're also quieter and resist corrosion. Metal fan blades are more durable in extreme conditions and can handle debris impacts better, but they're heavier and louder. Most Columbia drivers prefer plastic blades for everyday highway use, while metal blades are better suited for severe-duty applications like logging or construction where debris is common.

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

Installation typically takes 2-3 hours for experienced mechanics. You'll need basic hand tools, including socket sets (typically 13mm, 15mm, and 18mm), a torque wrench, and potentially a fan clutch wrench. The main challenges include working in tight spaces and properly aligning the shroud brackets. Some installations require removing the upper radiator hose for clearance. Always ensure the engine is cool before starting, and disconnect the battery to prevent accidental fan engagement.

My fan blade cracked after only a year - is this normal?

Premature fan blade failure is often caused by an out-of-balance condition, worn fan clutch, or misaligned shroud causing blade contact. Check for proper blade-to-shroud clearance (minimum 1 inch all around) and ensure your fan clutch engages and disengages smoothly. Vibration from a failing clutch is the leading cause of blade cracks. Quality aftermarket blades should last 3-5 years under normal conditions. If you experience early failure, inspect the entire cooling system for underlying issues.

Do I need to replace the shroud when changing the fan blade?

Not always, but inspect your shroud carefully for cracks, warping, or missing mounting tabs. A damaged shroud reduces cooling efficiency by up to 30% and can cause fan blade damage. If your shroud shows signs of heat warping (common near the exhaust side) or has broken mounting points, replacement is recommended. When keeping your existing shroud, clean it thoroughly and check that all rubber isolators are in good condition to prevent vibration damage to your new fan blade.