PETERBILT 579 YEAR 2019 BLACK PLASTIC COOLANT RESERVOIR CAP WITH NIPPLE Heavy Duty Replacement Part

This replacement coolant reservoir cap is engineered for heavy-duty commercial truck applications and designed to meet OEM specifications for Peterbilt and Kenworth vehicles. Constructed from durable black plastic, this cap features an integrated nipple design that ensures proper coolant system sealing and pressure relief functionality. The nipple component allows for safe venting and coolant overflow management, critical for maintaining optimal engine cooling system performance under demanding operating conditions. This component is compatible with a comprehensive range of Peterbilt models including the 357, 365, 367, 384, 386, 388, 389, and 389 Glider variants, as well as the 567 SBA series. The cap also fits select Kenworth models including the T660, T680, T800, T880, W900B, W900B Aerocab, W900L, and W900L Aerocab. With broad compatibility across model years from 1982 through current production, this replacement part offers reliable coverage for mixed fleet operations. The black plastic construction provides excellent chemical resistance to coolant formulations while maintaining structural integrity in high-temperature engine bay environments. The integrated nipple design facilitates proper system pressurization and coolant expansion accommodation, reducing the risk of overheating and coolant loss. Installation is straightforward, requiring no special tools or modifications. Ideal for fleet maintenance operations, independent service centers, and owner-operators seeking to maintain cooling system integrity and prevent costly downtime. This replacement cap is a cost-effective alternative to OEM components while maintaining necessary performance standards. Stock this essential maintenance item to ensure your heavy-duty truck fleet remains operational and reliable. Original Model: PETERBILT 579 YEAR 2019 BLACK PLASTIC COOLANT RESERVOIR CAP WITH NIPPLE