Frequently Asked Questions About International ProStar CAC Clamps, Boots & Hoses

What years and engine models do these CAC components fit?

Our CAC clamps, boots, and hoses are designed for International ProStar models from 2008-2017 equipped with MaxxForce 11, 13, and 15 engines, as well as Cummins ISX engines. Always verify your specific engine model and year before ordering, as charge air cooler configurations can vary between engine options and model years.

What are the most common signs that I need to replace my CAC boots or hoses?

Look for visible cracks, tears, or soft spots in the rubber, especially near the clamp areas. Other indicators include boost pressure loss (typically 3-5 PSI drop), increased turbo lag, black smoke during acceleration, or oil residue around the boot connections. If you hear a high-pitched whistling sound during acceleration, this often indicates a CAC leak that needs immediate attention.

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

Silicone CAC hoses typically last 3-4 times longer than standard rubber hoses and can withstand temperatures up to 500?F compared to 250?F for rubber. They resist oil contamination better and maintain flexibility in extreme cold. For trucks running high boost pressure (over 35 PSI) or operating in extreme climates, silicone is recommended despite the higher initial cost.

What torque specifications should I use when installing CAC clamps?

Standard T-bolt clamps should be torqued to 90-100 inch-pounds, while constant torque clamps typically require 50-60 inch-pounds. Over-tightening can damage boots and cause premature failure. Always clean the mounting surfaces thoroughly and apply a thin layer of silicone spray to ease installation and prevent tearing during assembly.

How often should I inspect and replace CAC components?

Inspect CAC boots and clamps every oil change or 15,000 miles. Replace rubber boots every 150,000-200,000 miles as preventive maintenance, or sooner if damage is visible. Clamps should be checked for proper tension annually, as they can lose clamping force over time. Keep spare clamps on hand, as roadside failures are common and can leave you stranded.