Peterbilt 352 CAC Clamps, Boots & Hoses

Frequently Asked Questions About Peterbilt 352 CAC Clamps, Boots & Hoses

What size CAC boots and clamps do I need for my Peterbilt 352?

Most Peterbilt 352 models use 3.5" to 4" diameter CAC boots, but the exact size depends on your engine configuration and model year. Measure the outer diameter of your charge air cooler pipes before ordering. For clamps, we recommend using T-bolt style clamps that are 1/4" to 1/2" larger than your boot diameter for proper sealing. If you're unsure, check your engine's service manual or contact us with your OEM for specific sizing.

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

CAC boots typically last 3-5 years under normal conditions, but inspect them every 6 months. Common failure signs include oil residue around the boot connections, hissing sounds under acceleration, loss of boost pressure, increased turbo lag, and visible cracks or soft spots in the rubber. Replace boots immediately if you notice any ballooning, tears, or if they feel sticky or overly soft when squeezed.

Can I install CAC components myself or do I need special tools?

Installation is straightforward and can be done with basic hand tools. You'll need a flathead screwdriver or 5/16" socket for most clamps, and possibly a heat gun to soften stubborn boots for removal. Apply a thin layer of silicone spray or dish soap to ease installation. The job typically takes 30-60 minutes. Make sure the engine is cool before starting, and always replace clamps when installing new boots for optimal sealing.

What's the difference between silicone and rubber CAC boots for my 352?

Silicone boots handle temperatures up to 500?F and last 2-3 times longer than standard rubber boots, making them ideal for high-performance or heavy-hauling applications. They resist oil contamination better but cost more upfront. Standard EPDM rubber boots work well for most applications, handling temps up to 300?F at a lower price point. Choose silicone if you frequently haul heavy loads or operate in extreme temperatures.

Why do my new CAC clamps keep loosening even after proper torque?

This usually happens when reusing old boots with new clamps or mixing clamp styles. Always use constant-torque clamps with silicone boots as they maintain pressure through temperature cycles. Standard worm-gear clamps work with rubber boots but may need retightening after the first heat cycle. Ensure boot surfaces are clean and free of oil before installation, and torque T-bolt clamps to 60-80 inch-pounds. Check and retighten all clamps after the first 100 miles of operation.