{"product_id":"motorad-t138-engine-coolant-reservoir-cap","title":"Motorad T138 Engine Coolant Reservoir Cap","description":"\u003ch2\u003eEngine Coolant Reservoir Cap Overview\u003c\/h2\u003e\u003cp\u003eThe Motorad Standard T138 engine coolant reservoir cap is a threaded replacement cap built to meet OEM specifications. It is made from plastic and uses a round, black design with indicator markings for straightforward service checks.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eManufactured to OEM specifications for direct replacement use.\u003c\/li\u003e\n\u003cli\u003eThreaded female attachment for secure installation and removal.\u003c\/li\u003e\n\u003cli\u003eStandard open-system design with proper relief and vacuum valve function.\u003c\/li\u003e\n\u003cli\u003eBlack plastic construction with indicator markings.\u003c\/li\u003e\n\u003cli\u003eRound profile with a 1.48 in. outside diameter.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Description\u003c\/h2\u003e\u003cp\u003eThis Motorad coolant reservoir cap, part number T138, is engineered for vehicles that use a standard open cooling system cap with a threaded female connection. The cap is designed to seal the reservoir properly while supporting pressure control through relief and vacuum valves. Its compact 0.44 in. overall height and 0.33 in. cap depth help it match the original service profile. This part number T138 is a practical replacement for Nissan cooling system service, including applications on the Nissan Altima, Nissan Maxima, Nissan Quest, Nissan Frontier, and Nissan Xterra.\u003c\/p\u003e\u003cp\u003eMotorad’s Standard line focuses on OE-style service parts that follow original specifications and are intended for straightforward replacement. This makes the T138 a suitable choice when you need a coolant reservoir cap that matches the original design and service function without unnecessary complexity. This part cross-references Gates (e.g., T138) for the same application.\u003c\/p\u003e\u003ch2\u003eWhat It Helps Address\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eLoose or worn reservoir cap sealing.\u003c\/li\u003e\n\u003cli\u003eLoss of proper cooling system pressure control.\u003c\/li\u003e\n\u003cli\u003eVacuum valve issues that affect coolant return.\u003c\/li\u003e\n\u003cli\u003eCracked or damaged threaded cap threads.\u003c\/li\u003e\n\u003cli\u003eService replacement for a missing or unreadable cap.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eConfirm the reservoir neck diameter, thread type, and system style before installation. This cap uses a female threaded attachment and is not vented or pressurized as a separate service feature. Match the cap to the reservoir opening and verify that the indicator markings are readable after installation.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eMotorad states that this cap is quality tested and manufactured from high-quality components to meet OEM specifications. It is built to withstand demanding automotive cooling system conditions.\u003c\/p\u003e","brand":"Motorad","offers":[{"title":"Default Title","offer_id":53716167917749,"sku":"BFNG-T138","price":27.88,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/TZ_T138_Fro.jpg?v=1794035731","url":"https:\/\/www.partcatalog.com\/products\/motorad-t138-engine-coolant-reservoir-cap","provider":"PartCatalog","version":"1.0","type":"link"}