Shop Peterbilt 357 & 378 Coolant Reservoirs

Peterbilt 357/378 Coolant Reservoirs

Peterbilt 357/378 Coolant Reservoirs offer a comprehensive solution for your truck's cooling system needs. Designed to fit Peterbilt and Kenworth trucks, these high-quality coolant reservoirs provide reliable overflow storage and easy access for maintenance. With a sturdy black plastic construction and a convenient nipple for hose attachment, these reservoirs ensure optimal coolant levels and efficient engine cooling. Whether you need to replace a worn-out cap or add a remote-mounted surge tank, the Peterbilt 357/378 Coolant Reservoirs deliver the performance and durability your semi truck demands. Enhance your vehicle's cooling system and maintain peak engine operation with these top-of-the-line Peterbilt and Kenworth compatible parts.

Frequently Asked Questions About Peterbilt 357/378 Coolant Reservoirs

What years and models are these coolant reservoirs compatible with?

Our coolant reservoirs are designed specifically for Peterbilt 357 and 378 models manufactured between 1987 and 2007. These reservoirs are direct replacements for OEM part numbers and will fit both standard and extended hood configurations. Always verify your truck's specific year and VIN before ordering, as minor variations may exist between early and late production models.

Are these coolant reservoirs made from the same material as OEM parts?

Most aftermarket coolant reservoirs for Peterbilt 357/378 trucks are manufactured from high-density polyethylene (HDPE) plastic, matching or exceeding OEM specifications. This material is resistant to engine coolant chemicals, temperature fluctuations, and road vibration. Some premium options feature reinforced mounting brackets and thicker wall construction for extended durability in heavy-duty applications.

How difficult is it to install a replacement coolant reservoir?

Installation typically takes 30-45 minutes and requires basic hand tools. The process involves draining the coolant system, disconnecting the upper and lower coolant hoses, removing 2-3 mounting bolts, and lifting out the old reservoir. Most common challenges include accessing the lower mounting bolt and ensuring proper hose clamp positioning. We recommend having new hose clamps on hand and checking all coolant lines for wear during installation.

Do these reservoirs come with caps and sensors?

Coolant reservoir availability varies by manufacturer. Some units come as complete assemblies with pressure caps and low coolant sensors pre-installed, while others are sold as tank-only replacements. Check the product description carefully - if sensors and caps are not included, your existing components can typically be transferred if they're in good condition. Replacement caps should be rated for 15-16 PSI to match Peterbilt specifications.

What capacity coolant reservoir do I need for my Peterbilt 357/378?

Standard coolant reservoirs for these models typically hold between 1.5 and 2 gallons, depending on your engine configuration. Trucks with Caterpillar C12, C13, or C15 engines generally use the larger 2-gallon capacity, while Cummins ISX and N14 equipped trucks may use either size. Check your existing reservoir or consult your owner's manual to confirm the correct capacity for your specific truck and engine combination.