The coolant recovery system ensures that there is no air in the system, and prevents coolant from spilling onto the ground. Air can cause cooling system components to rust and corrode, and coolant is a mixture of water and antifreeze, which contains ethylene glycol that is harmful to the environment. As coolant circulates through the cooling system, it picks up metal particles, which also contributes to its classification as hazardous material.

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    • (0 reviews)
      # sp27104
      Coolant Reservoir 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 manufactured to meet...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $17.69 - $40.28
    • (1 review)
      # sp10585
      GM Original Equipment™ Engine Coolant Recovery Tank 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
      $40.67 - $145.67
    • (0 reviews)
      # sp4189
      Coolant Recovery Tank Cap 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
      $3.95 - $22.62
    • (7 reviews)
      # sp49079
      Engine Coolant Recovery Tank by Dorman®. Dorman offers a comprehensive line of Coolant Recovery Tanks for a range of applications. All the Coolant Recovery Tanks are constructed from high-quality materials for long-lasting...
      Easy to installDirect replacement for a proper fit
      $8.02 - $341.95
    • (0 reviews)
      # sp34464
      GM Original Equipment™ Engine Coolant Expansion Tank 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
      $32.37 - $134.13
    • (5 reviews)
      # sp1422
      Coolant Recovery Tank by Replace®. Coolant recovery tanks can crack and leak coolant, and also become discolored from contaminated coolant. Most recovery tanks are translucent, with fill indicators on the side of the tank, so...
      Same quality as OE for less moneyDesigned with the latest software and manufactured with modern tooling
      $4.79 - $110.33
    • (0 reviews)
      # sp8844
      TechSmart™ Engine Coolant Expansion Tank by Standard®. SMP’s vision is to be the leading independent supplier to the automotive aftermarket, providing the highest quality products, competitive prices and the highest reputation...
      OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price
      $19.07 - $113.83
    • (6 reviews)
      # sp8703
      Expansion Tank 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
      $9.99 - $337.21
    • (0 reviews)
      # mpn2626814119
      Coolant Recovery Spare Tank by Sherman®. Without Motor. Put your vehicle back in top shape and replace damaged suspension parts with the high quality and affordable price of Sherman products. Designed with OE quality and durability...
      OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price
      $30.14
    • (0 reviews)
      # sp17017
      Engine Coolant Reservoir 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
      $5.94 - $31.35
    • (0 reviews)
      # sp16628
      Coolant Recovery Bottle 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
      $28.14 - $41.46
    • (0 reviews)
      # sp16025
      Engine Coolant Bottle 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
      $15.59 - $57.75
    • (0 reviews)
      # sp16624
      Engine Coolant Bottle Kit 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
      $22.94 - $27.80
    • (0 reviews)
      # sp8699
      Coolant Overflow Bottle by Omix-ADA®. Major parts like radiators, water pumps, and fans may be the stars of the cooling system, but they couldn't do their jobs without the supporting cast of hoses, gaskets, thermostats, radiator...
      Meets or exceeds OEM quality standardsOEM quality at an affordable price
      $23.30 - $38.75
    • (0 reviews)
      # mpn2480899794
      Coolant Recovery Tank by Omix-ADA®. 5 Year Limited Warranty. Major parts like radiators, water pumps, and fans may be the stars of the cooling system, but they couldn't do their jobs without the supporting cast of hoses, gaskets,...
      Meets or exceeds OEM quality standardsOEM quality at an affordable price
      $48.45
    • (1 review)
      # sp17263
      Coolant Overflow Tank 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
      $44.09 - $76.74
    • (0 reviews)
      # sp17264
      Coolant Recovery Tank 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
      $85.62 - $98.93
    • (0 reviews)
      # sp17303
      Radiator Overflow Bottle Kit 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....
      Made from first-rate materialsDesigned to comply with high-quality standards
      $268.29 - $286.73
    • (1 review)
      # sp96815
      Radiator Overflow Jar 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...
      Designed to help prevent your engine from overheatingMade from premium materials for exceptional reliability
      $37.92 - $63.22
    • (6 reviews)
      # sp12876
      Engine Coolant Expansion Tank 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...
      Designed to replace your worn out factory cooling partOptimizes engine cooling performance
      $9.69 - $145.97
    • (0 reviews)
      # mpn469957447
      Coolant Recovery Tank by Merchant Automotive®. Teardrop Shape. Build your ideal engine cooling system with superior Merchant Automotive cooling system parts that will help effectively carry away heat to prevent engine compartment...
      High quality at an affordable priceExpertly made from premium materials
      $107.92
    • (1 review)
      # sp8740
      Expansion Tank by Behr®. 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...
      Made to keep your vehicle's engine running coolDesigned to maintain proper cooling level and prevent overheating
      $26.97 - $180.82
    • (0 reviews)
      # sp8708
      Expansion Tank by Eurospare®. 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
      $30.15 - $75.80
    • (1 review)
      # sp8747
      Expansion Tank by Febi®. 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...
      Made to keep your vehicle's engine running coolDesigned to maintain proper cooling level and prevent overheating
      $27.80 - $95.90
    • (0 reviews)
      # sp23296
      Engine Coolant Recovery Tank by Goodmark®. Some other restoration sheet metal companies may carry popular panels like hoods, fenders and quarter panels, but far too often they come up empty when you need supporting parts like...
      Faithful reproduction of the original partHighest quality sheet metal parts available
      $41.37 - $203.13
    • (0 reviews)
      # sp26294
      Engine Coolant Recovery Tank by Metrix®. This top-grade Metrix product is a great way to go if you want to ensure reliable operation of your automobile. It is made utilizing high-grade materials and the latest equipment to deliver...
      Designed to help ensure reliable operation of your vehicleProven to deliver durable and efficient performance
      $31.45
    • (1 review)
      # sp8700
      Expansion Tank by Meyle®. 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...
      Made to keep your vehicle's engine running coolDesigned to maintain proper cooling level and prevent overheating
      $12.06 - $64.23
    • (2 reviews)
      # sp8745
      Expansion Tank by Mopar®. 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...
      The finest quality at a great priceOEM fit and function at a reasonable price
      $30.49 - $87.17
    • (0 reviews)
      # sp26549
      Expansion Tank by MTC®. 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...
      Made to keep your vehicle's engine running coolDesigned to maintain proper cooling level and prevent overheating
      $28.98 - $177.23
    • (0 reviews)
      # sp8705
      Expansion Tank by Original Equipment®. 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
      $10.55 - $268.24
    • (0 reviews)
      # sp32872
      Expansion Tank by Professional Parts Sweden®. 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...
      Made to keep your vehicle's engine running coolDesigned to maintain proper cooling level and prevent overheating
      $24.85 - $44.31
    • (0 reviews)
      # sp8706
      Expansion Tank by Vaico®. 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...
      Made to keep your vehicle's engine running coolDesigned to maintain proper cooling level and prevent overheating
      $12.66 - $97.04
    • (0 reviews)
      # sp14939
      Coolant Bleed Hose 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
      $13.98 - $68.95
    • (0 reviews)
      # sp95523
      Expansion Tank Hose 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...
      OE quality fluids from top original equipment and aftermarket manufacturersThe finest quality at a great price
      $3.88 - $158.14
    • (0 reviews)
      # sp17132
      Engine Coolant Recovery Tank Hose by Motorcraft®. Motorcraft engine coolant recovery tank hose are designed for maximum performance and durability.
      Direct OEM replacementMeets strict Ford Motor Company standards
      $8.84 - $65.62
    • (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....
      Made from first-rate materialsDesigned to comply with high-quality standards
      $21.96
    • (0 reviews)
      # sp17311
      Radiator Overflow Tube Clips 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....
      Made from first-rate materialsDesigned to comply with high-quality standards
      $32.18
    • (0 reviews)
      # sp108320
      Radiator Overflow Jar Bracket 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
      $27.23
    • (2 reviews)
      # sp17438
      Coolant Recovery Tank Hose by URO Parts®. Location: Expansion Tank to Engine. 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...
      OE quality parts from top original equipment and aftermarket manufacturersThe finest quality at a great price
      $3.57 - $64.58
    • (0 reviews)
      # mpn1032500040
      Coolant Recovery Tank Mounting Plate by URO Parts®. Coolant Recovery Tank Mounting Plate. Location: to Side of Radiator. Replace your inefficient cooling part that may lead to the cooling system breakdown with this premium...
      Designed to replace your worn out factory cooling partOptimizes engine cooling performance
      $34.99
    • (0 reviews)
      # mpn1032500033
      Coolant Recovery Tank Mounting Plate by URO Parts®. Coolant Recovery Tank Mounting Plate. Location: to Side of Radiator. Replace your inefficient cooling part that may lead to the cooling system breakdown with this premium...
      Designed to replace your worn out factory cooling partOptimizes engine cooling performance
      $38.91
    • (0 reviews)
      # sp47534
      Engine Coolant Bleed Hose 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
      $5.12 - $23.19
    • (0 reviews)
      # sp8702
      Coolant Recovery Tank Hose by Rein®. Now there's no need to waste time cutting hoses or repurposing old fittings to get a viable coolant hose assembly. Rein Automotive coolant hoses fit your vehicle the way the original...
      Direct replacement for European vehiclesNo cutting
      $3.62 - $30.25
    • (2 reviews)
      # sp32875
      Long Expansion Tank Hose by Rein®. Improve your vehicle's engine efficiency and extend its life expectancy with Rein Automotive parts that are built with premium quality fit, form, and function. All parts are manufactured in an...
      OE fit, form, and functionDesigned to meet or exceed OE specs
      $5.78 - $69.76
    • (0 reviews)
      # sp38233
      Coolant Bleed Hose by Elaplast®. 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...
      Made to keep your vehicle's engine running coolDesigned to maintain proper cooling level and prevent overheating
      $22.27 - $34.67
    • (0 reviews)
      # sp38235
      Expansion Tank Hose by Elaplast®. 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...
      Made to keep your vehicle's engine running coolDesigned to maintain proper cooling level and prevent overheating
      $5.41 - $49.90
    • (0 reviews)
      # sp41550
      Expansion Tank Hose by Mackay®. 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
      $3.97 - $22.11
    • (0 reviews)
      # sp42082
      Expansion Tank Hose by Meyle®. 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
      $5.26
    • (0 reviews)
      # sp8707
      Expansion Tank Hose by Vaico®. 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
      $5.88 - $82.81
    • (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
      $6.72 - $18.36
    • (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
      $4.60 - $9.29
    • (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...
      Designed to deliver trouble-free, consistent performanceRight for your vehicle and lifestyle
      $3.26
    • (0 reviews)
      # sp15631
      Coolant Reservoir Cap by Dorman®. Dorman offers a comprehensive line of Coolant Reservoir Caps for a range of applications. All the Coolant Reservoir Caps are constructed from high-quality materials for long-lasting durability.
      Easy to installDirect replacement for a proper fit
      $8.31 - $32.71
    • (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.
      Offer precise pressure controlEnsure the proper fit
      $2.35 - $13.25
    • (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...
      Expertly crafted from premium materialsDesigned to match rigorous quality standards
      $0.91 - $2.76
    • (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
      $2.47 - $9.84
    • (0 reviews)
      # sp16629
      Engine Coolant Recovery 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
      $5.74
    • (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)
      # 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
      $11.73 - $25.88
    • (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 - $17.85




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    In the coolant recovery system, coolant is added to a separate plastic tank that is connected to the radiator. There are usually graduations molded into the reservoir indicating the proper coolant level, which is customarily checked when the engine is cold. However, not all systems are the same. There are overflow tank systems and expansion tank systems. In an overflow system, the pressure cap is located on the radiator and the overflow tank has a simple plastic cap. When pressure in the radiator exceeds the cap’s pressure rating, coolant is allowed to flow from the radiator to the recovery tank. When the temperature of the coolant drops, a vacuum is created in the system, opening a vacuum valve in the pressure cap which allows coolant to be drawn back into the radiator.

    The pressure cap is located on the tank in the expansion tank system. Because the tank is part of the pressurized cooling system, it is made of heavier reinforced plastic. In this system the expansion tank is the highest point in the cooling system, and room is built into the tank to allow for the coolant to expand and contract according to temperature. The pressure cap functions the same as in the overflow system, but instead of coolant, air is released when pressure exceeds the cap’s pressure rating, and atmospheric pressure forces air back in when the coolant temperature drops and there is a vacuum in the system. Air does not present a problem for the system here because the tank is above the radiator and in this position will not aerate the coolant.

    Inspect the coolant recovery tank for cracks and any signs of leakage. These components are generally reliable but they can deteriorate from age and repeated heat cycling. They can also become discolored from contaminated coolant, making it hard to judge the coolant level accurately. Compare the pressure rating on the radiator pressure cap with the vehicle manufacturer’s specifications to make sure it is the correct one for the vehicle. Wait until the system has completely cooled and remove the cap from the radiator or expansion tank. Check the sealing gasket for damage that would prevent the cap from holding pressure and inspect the vacuum valve for damage that could cause it to stick, preventing coolant from flowing back into the radiator and causing collapsed hoses. Pressure test the cap with an appropriate tester and adapter. The cap should hold pressure up to its rating and then release, allowing pressure to escape.

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    Coolant Overflow Tanks & Components Reviews

    Average rating:  5  5 - 67 reviews
      /  Read All Expansion & Overflow Tanks Reviews
    5 of 5
    Awesome Product
    This bottle was a perfect fit, very simple for me to install, came in a timely manner. My problem was resolved in a matter of minutes, thank you and keep up the good work team. Sincerely, Vic.T.
    VPosted by Victor (Bradenton, FL) / April 15, 2017
    2003 Cadillac Deville
    Was this review helpful for you? Yes
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