Frequently Asked Questions About Freightliner FLC120 CAC Clamps, Boots & Hoses

What year models of Freightliner FLC120 are these CAC components compatible with?

Our CAC clamps, boots, and hoses are designed to fit Freightliner FLC120 models from 1989 through 2003. However, compatibility can vary based on your specific engine configuration. Detroit Series 60, Caterpillar 3406, and Cummins N14 engines may require different boot sizes and hose lengths. We recommend checking your existing part numbers or contacting us with your VIN to ensure proper fitment.

How often should I replace my CAC boots and hoses, and what are the warning signs of failure?

Most drivers report replacing CAC boots every 2-3 years and hoses every 3-5 years under normal operating conditions. Key warning signs include visible cracks or splits in the rubber, oil residue around connections, whistling sounds during acceleration, loss of boost pressure, and increased black smoke from the exhaust. If you notice any bulging, soft spots, or collapsed sections in your hoses, replacement is needed immediately to prevent engine damage.

What tools and time are required for installation of CAC components?

Installation typically takes 30-60 minutes per component. You'll need basic hand tools including screwdrivers, pliers, and a socket set. For clamps, a 5/16" or 8mm nut driver works best. Many drivers find it helpful to have a heat gun or hair dryer to warm boots for easier installation. Apply a thin layer of dish soap or silicone spray to boot connections for smoother fitting. Avoid petroleum-based lubricants as they can degrade rubber components.

What's the difference between silicone and rubber CAC hoses, and which should I choose?

Silicone hoses typically last 2-3 times longer than standard rubber hoses and can withstand temperatures up to 400?F compared to rubber's 250?F limit. Silicone maintains flexibility in extreme cold and resists oil degradation better. However, silicone costs approximately 40-60% more than rubber. For trucks operating in extreme temperatures or hauling heavy loads regularly, silicone is worth the investment. Weekend warriors and moderate-use trucks often find quality rubber hoses sufficient.

Are stainless steel T-bolt clamps really necessary, or will standard worm gear clamps work?

T-bolt clamps provide more even clamping pressure and are less likely to cut into hoses compared to worm gear clamps. They're especially important for silicone hoses and connections experiencing boost pressures above 30 PSI. While worm gear clamps can work in a pinch, many drivers report blow-offs under heavy loads. Stainless steel T-bolt clamps cost about $8-15 each but prevent costly roadside failures. For critical connections like the CAC-to-intake boot, T-bolt clamps are strongly recommended.