Acting as a pressure valve for the radiator, a radiator cap is of vital importance to maintain the efficiency of the cooling system. Its main purpose is to keep the engine coolant within the radiator under the certain amount of pressure, thus raising the boiling point of the fluid and helping to avoid overheating. A radiator cap also helps avoid excessive pressure buildup within the system by diverting a small amount of hot coolant into the overflow reservoir and drawing it back once the pressure has reached acceptable levels.

Show items:
Sort by:
    • (2 reviews)
      # sp34468
      GM Original Equipment Engine Coolant Recovery Tank Cap by ACDelco®. Designed utilizing the latest technology, this product by ACDelco features premium quality and will perform better than advertised. Perfect for your vehicle and...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $6.61 - $32.09
    • (0 reviews)
      # sp32880
      GM Original Equipment™ Engine Coolant Reservoir Cap by ACDelco®. Designed utilizing the latest technology, this product by ACDelco features premium quality and will perform better than advertised. Perfect for your vehicle and...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $2.82 - $20.31
    • (1 review)
      # sp10623
      GM Original Equipment™ Radiator Cap by ACDelco®. Designed utilizing the latest technology, this product by ACDelco features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it is...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $8.09 - $16.72
    • (0 reviews)
      # sp10656
      Professional™ Engine Coolant Recovery Tank Cap by ACDelco®. Designed utilizing the latest technology, this product by ACDelco features premium quality and will perform better than advertised. Perfect for your vehicle and lifestyle, it...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $3.26
    • (1 review)
      # sp10665
      Professional™ Radiator Cap by ACDelco®. With a full range of part numbers to fit most GM vehicles, ACDelco Professional Radiator Caps offer customers an ideal replacement for their worn OE part. Built to our demanding specifications,...
      Lets you release the pressure prior to taking off the cap.Designed to be OE-like.
      $2.70 - $17.72
    • (0 reviews)
      # mpn4476398156
      Black Coolant Reservoir Cap by Dorman®. Type: Snap On. Material: Plastic. Finish: Black. Package Type: Box. All Dorman Engine Coolant Recovery Tank Caps are constructed of high-quality plastic. They effectively protect the cooling...
      Constructed of high quality materials for long-lasting useDirect replacement for a proper fit every time
      $3.51
    • (1 review)
      # sp15631
      Coolant Reservoir Cap by Dorman®. Dorman offers a variety of Engine Coolant Recovery Tank Caps for a range of applications. All our Engine Coolant Recovery Tank Caps are constructed of high-quality plastic. They effectively protect the...
      Save time, money and labor by replacing only the Cap—instead of the entire Engine Coolant Recovery TankDirect replacement for a proper fit every time
      $5.37 - $24.48
    • (1 review)
      # sp114798
      Engine Coolant Recovery Tank Caps by Dorman®. Dorman offers a variety of Engine Coolant Recovery Tank Caps for a range of applications. All the Engine Coolant Recovery Tank Caps are constructed of high-quality plastic. They effectively...
      Save time, money and labor by replacing only the Cap instead of the entire Engine Coolant Recovery TankDirect replacement for a proper fit every time
      $2.37 - $21.95
    • (0 reviews)
      # sp10015
      Engine Coolant Recovery Tank Cap by MotoRad®. MotoRad radiator caps are designed and manufactured to offer precise control for the automotive cooling system.
      Made to keep your vehicle's engine running coolDesigned to maintain proper cooling level and prevent overheating
      $2.22 - $13.25
    • (1 review)
      # sp10013
      Safety Lever Radiator Cap by MotoRad®. MotoRad radiator caps are designed and manufactured to offer precise control for the automotive cooling system.
      Offer precise pressure controlEnsure the proper fit
      $3.24 - $6.34
    • (0 reviews)
      # sp10018
      Standard Radiator Cap by MotoRad®. MotoRad radiator caps are designed and manufactured to offer precise control for the automotive cooling system.
      Offer precise pressure controlEnsure the proper fit
      $2.24 - $5.09
    • (0 reviews)
      # sp107656
      Engine Coolant Reservoir Cap by Genuine®. Increase the life of your vehicle's engine by keeping your cooling system in top condition. Replace your faulty engine cooling component with this highly efficient replacement product and be...
      Made to keep your vehicle's engine running coolDesigned to maintain proper cooling level and prevent overheating
      $2.50 - $33.71
    • (2 reviews)
      # sp39271
      Expansion Tank Cap by Genuine®. Increase the life of your vehicle's engine by keeping your cooling system in top condition. Replace your faulty engine cooling component with this highly efficient replacement product and be sure the...
      Made to keep your vehicle's engine running coolDesigned to maintain proper cooling level and prevent overheating
      $17.93 - $22.49
    • (0 reviews)
      # sp8783
      Radiator Cap by Genuine®. Increase the life of your vehicle's engine by keeping your cooling system in top condition. Replace your faulty engine cooling component with this highly efficient replacement product and be sure the heart of...
      Made to keep your vehicle's engine running coolDesigned to maintain proper cooling level and prevent overheating
      $11.01 - $58.63
    • (0 reviews)
      # sp8777
      Radiator Cap by Motorcraft®. Motorcraft radiator cap is designed for maximum performance and durability.
      Direct OEM replacementMeets strict Ford Motor Company standards
      $3.54 - $19.64
    • (0 reviews)
      # sp17018
      Engine Coolant Reservoir Cap by Auto 7®. This product is made of high-quality materials to serve you for years to come. Designed using state-of-the-art technology and with customers in mind, this product by Auto 7 will last a lifetime....
      Expertly crafted from premium materialsDesigned to match rigorous quality standards
      $1.00 - $2.90
    • (1 review)
      # sp16623
      Engine Coolant Bottle Cap by Crown®. Crown Automotive is just the ticket if you want to get the most out of your vehicle as well as revel in a more exciting driving experience. You will surely get a real bang for the buck!
      Developed to improve your driving experienceConstructed to ensure ultimate operation
      $2.98 - $9.68
    • (0 reviews)
      # sp16655
      Radiator Cap by Crown®. Crown Automotive is just the ticket if you want to get the most out of your vehicle as well as revel in a more exciting driving experience. You will surely get a real bang for the buck!
      Developed to improve your driving experienceConstructed to ensure ultimate operation
      $6.36 - $10.91
    • (0 reviews)
      # sp43143
      Radiator Caps by Omix-ADA®. The radiator is where all the heat absorbed by your engine coolant is transferred to the air. Anything that inhibits this transfer, like leaks, clogged radiator coolant passages, or obstructed or damaged...
      Comes ready to installSame size and capacity as OEM for optimal OEM spec cooling
      $7.45 - $14.04
    • (0 reviews)
      # sp17284
      Radiator Cap by OPGI®. This superior product is painstakingly designed to provide outstanding quality and value. Expertly crafted from first-rate materials to the highest standards it ensures maximum durability. This OPGI product will...
      Made from first-rate materialsDesigned to comply with high-quality standards
      $20.26 - $74.13
    • (0 reviews)
      # sp17302
      Radiator Overflow Bottle Cap by OPGI®. This superior product is painstakingly designed to provide outstanding quality and value. Expertly crafted from first-rate materials to the highest standards it ensures maximum durability. This...
      Made from first-rate materialsDesigned to comply with high-quality standards
      $21.96
    • (0 reviews)
      # sp17308
      Radiator Overflow Cap by OPGI®. This superior product is painstakingly designed to provide outstanding quality and value. Expertly crafted from first-rate materials to the highest standards it ensures maximum durability. This OPGI...
      Made from first-rate materialsDesigned to comply with high-quality standards
      $25.37
    • (1 review)
      # sp114919
      Overflow Jar Cap by OER®. If you’re looking to ensure reliable performance of your vehicle’s cooling system, this first-rate OER product is right up your alley. It is manufactured from top-grade materials using modern equipment to...
      Designed to help prevent your engine from overheatingMade from premium materials for exceptional reliability
      $11.73 - $13.20
    • (0 reviews)
      # sp96812
      Overflow System Bottles and Caps by OER®. If you’re looking to ensure reliable performance of your vehicle’s cooling system, this first-rate OER product is right up your alley. It is manufactured from top-grade materials using...
      Designed to help prevent your engine from overheatingMade from premium materials for exceptional reliability
      $25.88
    • (0 reviews)
      # sp101196
      Radiator Cap by OER®. 15 lbs. Authentic reproduction of the original radiator cap designed for the enthusiast who wants total originality in a reproduction cap. Features the correct cap rating along with all the correct markings as...
      Designed to help prevent your engine from overheatingMade from premium materials for exceptional reliability
      $33.20 - $35.96
    • (0 reviews)
      # sp19781
      Engine Coolant Reservoir Cap by Stant®. OE Type Radiator Cap. OE Comparison Rating: OE Quality. Pressure Rating: 15. SAE Pressure Range: 14-18. Coolant Recovery System: Closed System. Cap Depth: 1.44". Filler Neck Outside Diameter:...
      Meets Original Equipment specificationsThe SWIV-EL design allows the cap to be installed and removed much easier than conventional reservoir caps
      $2.95 - $18.40
    • (4 reviews)
      # sp5087
      Radiator Cap by Stant®. Test your radiator cap whenever you service the cooling system. If you’re in need of a replacement you can prevent engine overheating and expensive damage with a new Stant radiator cap. They’re made from...
      Meets Original Equipment specificationsThe SWIV-EL design allows the cap to be installed and removed much easier than conventional radiator caps
      $2.70 - $17.97
    • (0 reviews)
      # sp12871
      Coolant Tank Cap by URO Parts®. Replace your inefficient cooling part that may lead to the cooling system breakdown with this premium component that will keep your engine cool and safe. Designed to meet or even exceed all OEM...
      Designed to replace your worn out factory cooling partOptimizes engine cooling performance
      $2.71 - $12.11
    • (0 reviews)
      # sp114855
      Engine Coolant Reservoir Cap by URO Parts®. Replace your inefficient cooling part that may lead to the cooling system breakdown with this premium component that will keep your engine cool and safe. Designed to meet or even exceed all...
      Designed to replace your worn out factory cooling partOptimizes engine cooling performance
      $2.41 - $13.99
    • (0 reviews)
      # sp5833
      Coolant Recovery Tank Cap by Rein®. Rein First Aid coolant, oil, and fuel caps are designed to maintain the correct pressure, making sure the vehicle operates smoothly and that no check engine lights illuminate.
      Made to keep your vehicle's engine running coolDesigned to maintain proper cooling level and prevent overheating
      $4.41 - $16.18




    Featured Brands

    Having a properly functioning radiator cap is a perfect solution to be sure that the engine coolant will stay where it has to be – inside the cooling system instead of flowing like a waterfall into the overflow tank or evaporating in mere seconds. Here at CARiD, we pride ourselves on offering an extensive collection of first-rate replacement radiator caps that are designed with utmost care to provide proper operation of your vehicle’s cooling system. Made to the strictest OE quality standards, they are sure to provide excellent performance.

    If you’ve noticed that your vehicle is overheated especially at low temperatures or the levels of the radiator coolant are too low despite of the fact that they’ve been just topped off, the first thing you should start with is to check for a faulty radiator cap. Your radiator cap is engineered to keep the fluid coursing through the engine, but when it is damaged the fluid will boil, eventually ending up leaking out into the overflow tank or gushing out on the asphalt. This may result in blowing of the radiator and, what’s more, can cause damages to the entire engine. Since the defective radiator cap can create a whole lot of trouble for your automobile, replacing it in time will save you time and money preventing more serious and expensive problems.

    Many people do not pay any attention to the condition of the radiator cap in their vehicles until serious problems occur. At CARiD, we recommend you to check your radiator cap for leaks and damage on a regular basis. Even brand-new looking cap can be the root of the problem causing your engine cooling system to malfunction. The reason is that a radiator cap has a special built-in valve which remains close until the pressure inside the system reaches the manufacturer-specified level. Once it's reached, the valve must open allowing excessive heat to escape and then close as soon as the pressure goes down. In fact, it doesn't always work this way. Due to some reasons, small particles of dirt and other elements may get into the system and jam the valve.

    Don’t compromise on the health of your cooling system. Keep it securely sealed and properly pressurized with premium replacement radiator caps offered on our website. They are designed to function exactly like the original, so you can rest assured you will have the right balance of pressure your cooling system needs. All products we offer are made by the most renowned aftermarket manufacturers using only the highest-grade materials to deliver exact OE fit and look, so that no one else except of you will know that this product is not OEM. No matter your needs, in our online store we have what you crave for to keep the engine coolant in control without paying through the nose.

    Related Categories

    Browse by Vehicle

    Replacement Radiator Caps Reviews

    Average rating:  4.5  4.5 - 14 reviews
    5 of 5
    Exactly What I Ordered
    Thanks! Easy and quick to order. Arrived ahead of schedule.
    KPosted by Kraig (Orem, UT) / September 6, 2017
    1996 Land Rover Discovery
    Was this review helpful for you? Yes
    View More
    SECURE SHOPPING

    All manufacturer names, symbols, and descriptions, used in our images and text are used solely for identification purposes only.
    It is neither inferred nor implied that any item sold by CARiD.com is a product authorized by or in any way connected with any vehicle manufacturers displayed on this page.