Heavy-Duty Intercoolers for Peterbilt 330/335/337 Truck Models
We stock a wide array of replacement intercoolers for the Peterbilt 330/335/337 model truck. The charge air cooler (CAC) is responsible for cooling down the hot air generated by the turbocharger before it enters the engine. A damaged CAC can lead to worse-case-scenarios like: turbo failure, clogged DPF (diesel particulate filter), worn-out pistons/rings, and cracked manifolds that result in exhaust leaks. If you're seeing symptoms like: a high-pitched hissing sound when the turbo cycles up, a drop in horsepower and torque, black smoke from the exhaust, rising exhaust gas temps seen from your pyrometer gauge, and a drop in MPG. Thankfully, we stock made-to-fit replacements that quickly ship to your specified address so you can get back on the road faster. You can find CAC kits with durable silicone hoses, heavy-duty T-bolt clamps, and mount bushings for a secure, leak-free installation. Need help finding a specific product, call the 4 State product specialist team.Frequently Asked Questions About Peterbilt 330/335/337 Charge Air Coolers
Will these charge air coolers fit my specific Peterbilt 330, 335, or 337 model year?
Our charge air coolers are designed to fit Peterbilt 330, 335, and 337 models from 2005 to 2015. However, there can be variations based on your engine type (Caterpillar C7, Cummins ISB, or Paccar PX-6/PX-7) and whether you have a front-mount or side-mount configuration. We recommend checking your existing cooler's part number or contacting us with your OEM to ensure proper fitment before ordering.
What's the difference between aluminum and plastic tank charge air coolers, and which should I choose?
Aluminum tank coolers typically offer better durability and heat dissipation, lasting 5-7 years on average, while plastic tank models are more affordable but may only last 3-5 years depending on operating conditions. If you operate in extreme temperatures or heavy-duty applications, aluminum is recommended. For lighter duty or budget-conscious applications, plastic tanks work well. Both types feature aluminum cores for optimal cooling efficiency.
Can I install a charge air cooler myself, or do I need a professional mechanic?
Installation typically takes 2-4 hours and requires basic mechanical skills. You'll need to drain coolant, disconnect air intake hoses, remove mounting brackets, and properly torque all connections to manufacturer specifications (typically 15-20 ft-lbs for hose clamps). Common challenges include accessing lower mounting bolts and ensuring proper hose alignment. If you're uncomfortable working with cooling systems or lack the proper tools, professional installation is recommended to prevent air leaks or coolant loss.
How do I know if my charge air cooler is failing and needs replacement?
Common signs include: excessive black smoke from exhaust, loss of power especially under load, higher than normal exhaust gas temperatures (above 1200?F), visible oil residue in the charge air cooler tubes, or coolant in the intake system. You can perform a pressure test at 30 PSI - if pressure drops more than 5 PSI in 15 seconds, replacement is needed. Also check for physical damage like bent fins, cracked tanks, or corroded connections.
Are aftermarket charge air coolers as good as OEM Peterbilt parts?
Quality aftermarket charge air coolers from reputable manufacturers often match or exceed OEM specifications at 40-60% less cost. Look for coolers that meet or exceed OEM pressure ratings (typically 45-50 PSI working pressure), use brazed aluminum cores, and include proper mounting hardware. Many aftermarket units feature improved fin density for better cooling efficiency. Always verify the manufacturer offers at least a 1-year warranty and has positive customer reviews for your specific application.
