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Freightliner Columbia 112/120 CAC Clamps-Boot-Hose
Frequently Asked Questions About Freightliner Columbia 112/120 CAC Clamps, Boots & Hoses
What years and models are these CAC components compatible with?
These charge air cooler (CAC) clamps, boots, and hoses are specifically designed for Freightliner Columbia 112 and 120 models manufactured from 2000 to 2015. They're compatible with Detroit Diesel DD13, DD15, DD16, Series 60, Caterpillar C12, C13, C15, and Cummins ISX engines. Always verify your engine model and year before ordering, as CAC configurations can vary between different engine options even within the same truck model year.
What's the difference between silicone and rubber CAC boots, and which should I choose?
Silicone boots offer superior heat resistance (up to 500?F), greater flexibility in extreme temperatures, and typically last 3-5 times longer than standard rubber boots. They're ideal for heavy-duty applications or hot climate operations. Rubber boots are more economical and work well for standard applications, but may need replacement every 2-3 years. If you're experiencing frequent boot failures or operate in extreme conditions, silicone is worth the investment.
How do I know what size clamp I need for my CAC system?
CAC clamp sizing depends on your specific hose and boot diameter. Most Columbia 112/120 models use 3-inch, 3.5-inch, or 4-inch clamps. Measure the outer diameter of your CAC hose or boot where the clamp sits. For T-bolt clamps, order a size that provides at least 1/4 inch of adjustment range beyond your measured diameter. Spring-loaded constant torque clamps automatically adjust but still require proper initial sizing.
Can I install these CAC components myself, or do I need special tools?
Most CAC boots and hoses can be installed with basic hand tools - typically a flathead screwdriver for worm gear clamps or a socket wrench for T-bolt clamps. Installation usually takes 30-60 minutes. Key tips: Clean all connection surfaces thoroughly, apply a thin layer of dish soap to boot ends for easier installation, and ensure proper alignment before tightening. Torque T-bolt clamps to 70-80 inch-pounds unless otherwise specified.
How often should I replace CAC clamps, boots, and hoses?
Inspect CAC components during every oil change. Replace boots showing cracks, oil saturation, or loss of flexibility. Hoses should be replaced if you notice soft spots, bulging, or internal delamination. Quality silicone components typically last 250,000-500,000 miles, while rubber versions may need replacement every 150,000-250,000 miles. Replace clamps if they show corrosion or won't maintain proper tension. Consider replacing all CAC connections simultaneously to prevent repeat failures.