International 4700-4900 CAC Clamps, Boots & Hoses

Frequently Asked Questions About International 4700-4900 CAC Clamps, Boots & Hoses

What does "CAC" mean, and what part of the truck does this affect?

CAC stands for Charge Air Cooler, which is another term for the intercooler system on your International 4700-4900. The clamps, boots, and hoses in this category connect the turbocharger to the intercooler and then to the intake manifold, allowing pressurized air to travel through the system without leaking. If you are experiencing a loss of power, boost leaks, or a hissing sound from the engine bay, a worn boot or loose clamp in this system is often the cause.

How do I know if my CAC boot or hose needs to be replaced?

Common signs of a failing boot or hose include visible cracking, dry rot, soft or spongy spots, or a noticeable loss of engine power and fuel economy. You may also hear a whistling or hissing noise coming from the charge air piping while driving. Inspecting the boots for splits at the clamp connections and checking for oily residue or soot around the fittings can help confirm whether a replacement is needed.

Are these clamps, boots, and hoses specific to certain engine or model years within the 4700-4900 lineup?

Yes, charge air piping components can vary depending on the engine used and the model year of the truck. Before ordering, it is important to confirm the specific engine and year of your 4700 or 4900 to make sure the boot size, hose length, and clamp diameter will match your existing setup. If you are unsure, checking the part numbers on your current components or contacting our team for help is the best way to verify fit.

What material are the boots and hoses made from, and how durable are they?

CAC boots and hoses are typically made from reinforced silicone or heavy-duty rubber designed to handle the heat and pressure of the charge air system. Silicone boots generally offer better resistance to heat cycling and cracking over time compared to standard rubber, which is why many replacement parts use silicone construction. Clamps are usually made from stainless steel to resist corrosion and maintain a secure seal.

Can I install these parts myself, or do I need a shop to do it?

Many truck owners replace CAC clamps, boots, and hoses themselves, since the job mainly involves loosening the old clamps, removing the damaged boot or hose, and installing the new one before tightening everything back down to spec. Basic hand tools are usually all that is required. That said, access can be tight depending on where the component sits in the engine bay, so if you are not comfortable working around the turbo and intake system, having a shop handle the installation is a reasonable option.