Peterbilt 330/335/337 CAC Clamps, Boots & Hoses

Maintain Your Peterbilt Charge Air Cooler

If your Peterbilt feels lazy on pulls or burns more fuel than it should, look at the CAC system first. CAC clamps, boots, and hoses are the engine’s air veins. They carry high-pressure, cooled air from the turbo to the engine. When they’re sealed tight, your truck breathes right. When they fail, everything suffers. A leaking CAC boot or hose dumps boost. Power drops. Fuel mileage gets worse. The truck works harder just to hold speed. That extra fuel creates soot, and soot is bad news for your DPF. One small leak can turn into an expensive emissions problem fast. Oil is the quiet killer here. A small turbo oil leak can soak silicone boots over time. The boot softens. It swells. Then it blows apart under boost. That’s how drivers end up derated on the shoulder with black smoke pouring out. Strong clamps matter just as much as the boots. Loose or weak clamps let hoses slip and leak. Worse, they can let unfiltered air sneak in. That dust and grit goes straight into the engine. That’s how engines get “dusted,” and that damage is permanent. Most failures give warnings. You might hear it first. A hiss. A whistle under load. You might see it. Oil-soaked boots. Black smoke. Lower boost on the gauge. A quick pre-trip check saves money. Look for soft spots. Cracks. Swelling. Oil residue near connections. Catching a bad boot early beats sitting roadside waiting on a tow. Quality CAC boots, hoses, and heavy-duty clamps keep your Peterbilt pulling strong, protect your emissions system, and help your engine live a longer life. Tight connections don’t just restore power. They protect everything downstream