Peterbilt 387 Radiators

Frequently Asked Questions About Peterbilt 387 Radiators

Will this radiator fit my Peterbilt 387 without modifications?

Radiators are built to match the specific core size, tank configuration, and mounting points used on the Peterbilt 387, but engine option, cooling package, and production year can affect fitment. Always check the part number against your VIN or existing radiator before ordering, and reach out to our team if you are unsure which version your truck requires.

What material is the radiator core made of, and does it affect cooling performance?

Most replacement radiators for the 387 use an aluminum core with either plastic or aluminum tanks. Aluminum cores are lightweight and resist corrosion well, while the tank material can influence durability under pressure and heat cycling. Choosing a radiator with a core size and construction that matches your original equipment helps maintain proper cooling performance.

Can I install a Peterbilt 387 radiator myself, or should I have a professional do it?

Radiator replacement involves draining coolant, disconnecting hoses, and often removing the fan shroud or grille components to access mounting brackets. If you are comfortable with basic mechanical work and have the right tools, installation is manageable. However, because proper sealing and bracket alignment are important for preventing leaks and overheating, many customers choose to have the job done by a qualified technician.

How do I know if my radiator needs to be replaced versus repaired?

Common signs that point to replacement include persistent leaks, corrosion or damage to the core, bent or crushed fins that restrict airflow, and recurring overheating issues that are not resolved by flushing the cooling system. If the damage is isolated to a tank or seam, a repair may be possible, but core damage typically calls for a full replacement.

Does this radiator come with a warranty, and what does it cover?

Warranty coverage varies by manufacturer and is listed on each individual product page. In general, radiator warranties cover defects in materials or workmanship but do not cover damage from improper installation, road debris, or lack of maintenance. Be sure to review the specific warranty terms for the radiator you are considering before completing your purchase.