Peterbilt 352 Engine Parts & Cooling

Frequently Asked Questions About Peterbilt 352 Engine Parts & Cooling

What years and engine models are compatible with Peterbilt 352 cooling parts?

Peterbilt 352 models were primarily produced from 1969 to 1980. Most cooling parts are compatible with Caterpillar 3406, 3408, Cummins NTC series, and Detroit Diesel 8V71/8V92 engines commonly found in these trucks. However, always verify your specific engine serial number and model year before ordering, as some mid-production changes occurred. Radiators and fan shrouds may vary between cabover and conventional configurations.

How difficult is it to replace a radiator on a Peterbilt 352, and what tools are required?

Radiator replacement typically takes 3-4 hours for experienced mechanics. You'll need basic hand tools, a coolant drain pan, and potentially a hoist for heavier aluminum radiators. The main challenges include limited access space in the engine compartment and aligning mounting brackets correctly. Most installations require disconnecting the upper and lower hoses, transmission cooler lines, and removing the fan shroud. Professional installation is recommended if you're unfamiliar with heavy truck cooling systems.

What's the difference between aluminum and copper/brass radiators for the 352?

Copper/brass radiators offer superior heat dissipation and are easier to repair but weigh 40-60% more than aluminum alternatives. Aluminum radiators provide better corrosion resistance and improved fuel economy due to reduced weight, but require complete replacement if core damage occurs. For vintage restorations, copper/brass maintains originality. For working trucks, aluminum offers better long-term value despite higher upfront costs.

Why is my Peterbilt 352 overheating even with new cooling parts?

Common causes beyond faulty parts include incorrect fan clutch engagement temperatures, blocked radiator fins, collapsed lower radiator hoses, or thermostat ratings mismatched to your operating conditions. Verify your fan clutch engages at 180-195°F, check for proper coolant flow direction, and ensure your radiator cap maintains 15-16 PSI. Scale buildup in older engines can also restrict coolant passages, requiring professional flushing.

What aftermarket upgrades improve cooling performance for high-horsepower 352 builds?

High-capacity aluminum radiators with 4-row cores, upgraded fan clutches with lower engagement temperatures, and electric auxiliary fans significantly improve cooling capacity. Consider adding coolant filtration systems to prevent cavitation damage in high-performance engines. Silicone hoses withstand higher temperatures and last longer than standard rubber. For engines over 500HP, dual electric fans with thermostatic controls provide optimal temperature management.