Frequently Asked Questions About Kenworth T2000 CAC Clamps, Boots & Hoses

What are the most common sizes for CAC boots and hoses on my Kenworth T2000?

Most Kenworth T2000 models use 3-inch to 4-inch diameter CAC hoses, with the most common being 3.5-inch for the cold side and 4-inch for the hot side connections. Boot sizes typically match these diameters. Always measure your existing components or check your engine specifications (especially for CAT C12, C15, or Cummins ISX engines) before ordering, as some model years or aftermarket modifications may require different sizes.

How do I know when my CAC boots and clamps need replacement?

Look for these warning signs: visible cracks or splits in the rubber boots, oil residue around connections (indicating boost leaks), decreased fuel economy, black smoke during acceleration, or whistling sounds under load. Clamps should be replaced if they show rust, stripped threads, or no longer maintain proper torque. We recommend inspecting these components every 100,000 miles or during regular PM services.

What's the difference between standard and constant-torque clamps for my T2000?

Standard worm-gear clamps require periodic retightening and may lose clamping force due to temperature cycling. Constant-torque clamps automatically adjust to maintain consistent pressure as boots expand and contract, reducing the risk of boost leaks. For T2000 trucks running higher boost pressures (over 30 PSI) or in severe-duty applications, constant-torque clamps are strongly recommended despite the higher initial cost.

Are silicone CAC hoses worth the extra cost compared to standard rubber?

Silicone hoses typically last 3-4 times longer than standard rubber hoses and handle temperatures up to 500?F compared to 250?F for rubber. They resist oil degradation better and maintain flexibility in extreme cold. For T2000 owners keeping their trucks long-term or operating in extreme climates, silicone hoses often pay for themselves through reduced downtime and replacement frequency. However, quality rubber hoses are perfectly adequate for most applications.

What tools and time are needed to replace CAC boots and hoses on a T2000?

Basic replacement requires a socket set (typically 7mm or 5/16" for clamps), flat-head screwdriver, and possibly hose picks for stubborn boots. Allow 1-2 hours for a complete set replacement. The job is easier with the hood tilted. Common challenges include accessing the lower connections near the CAC cooler and removing boots that have bonded to pipes. Applying soapy water or silicone spray helps with installation. Always replace clamps when changing boots to ensure proper sealing.