Truck Parts by Make, Model & Year.

COOLING SYSTEM

How Does a Semi Truck Radiator Work? A Practical Guide

Roughly a quarter of your fuel's energy leaves the engine as heat in the coolant. How the loop works, what the core actually is, downflow against crossflow, and why two radiators with identical cores often will not interchange.

COOLING SYSTEM

What Is a Charge Air Cooler? CAC Explained for Semi Trucks

CAC stands for charge air cooler. What it does, why 200°C charge air costs you power, how it differs from an intercooler, and how to tell when yours is leaking.

COOLING SYSTEM

Peterbilt 379 & 389 Charge Air Cooler: Failure Signs, Diagnosis & Replacement Cost

Power loss, black smoke, boost codes — how to tell if your Peterbilt 379 or 389 charge air cooler is failing. CAT, Cummins & Paccar MX-13 diagnosis steps, and replacement costs in Canada.