Peterbilt 567/579 Coolant Reservoirs

Frequently Asked Questions About Peterbilt 567/579 Coolant Reservoirs

Will this coolant reservoir fit my Peterbilt 567 or 579 without modification?

Most coolant reservoirs listed in this category are designed to be a direct fit for the Peterbilt 567 and 579 models, matching the factory mounting points and hose connections. However, because these trucks span multiple production years, its important to check the specific year range and engine configuration listed on each product page before ordering to confirm it matches your truck.

Is this reservoir made from the same material as the factory original?

Coolant reservoirs in this category are typically manufactured from durable plastic or poly materials similar to OEM units, designed to withstand engine heat and coolant exposure. Some listings may specify whether the part is OEM, OEM-style, or aftermarket, so check the product description for material and manufacturer details if that is a priority for you.

Does the reservoir come with the cap, sensor, or mounting hardware included?

This varies by listing. Some coolant reservoirs are sold complete with the cap and level sensor, while others are sold as the tank only. Always review the product description and included parts list before purchasing to make sure you are getting everything you need for the install.

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

Common signs that a reservoir needs replacement include visible cracks, coolant leaks around the seams or cap, discoloration from overheating, or a reservoir that no longer holds pressure properly. If you are noticing frequent low coolant warnings or visible residue around the tank, it is generally more reliable to replace the unit than to attempt a repair.

Is installing a new coolant reservoir something I can do myself?

Replacing a coolant reservoir is a relatively straightforward job for most owner-operators or shop technicians, typically involving draining residual coolant, disconnecting hoses and the sensor if equipped, and unbolting the old tank before installing the new one. That said, always let the engine cool completely before starting, and refer to your Peterbilt service manual for torque specs and coolant capacity to ensure a proper refill and bleed of the system.