10 Best Radiator Cap Review of 2021

Top 5 Best Radiator Cap: Editor Recommended

The 10 Best Radiator Cap Reviews:

1. Gates 31523 Radiator Cap

Gates 31523 Radiator Cap

The coolant level is going down in the radiator, but not in the overflow reservoir, it is the radiator cap. Not only does the cap have to seal and hold pressure during operation, but it also has a vacuum valve to allow the coolant back into the radiator as it cools down.

The lower spring loaded seal is what holds pressure to raise boiling point of coolant, but it is the upper seal and vacuum valve that come into play to allow coolant to fill up radiator as it cools or after air pockets are “burped”. Many bad radiator caps are diagnosed as bad head gaskets by unscrupulous mechanics.

Highlighted Features:

  • Country of Origin : Mexico
  • The Package Height of the Product is 3.02 inches
  • The Package Length of the Product is 7.53 inches
  • The Package Width of the Product is 5.58 inches

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2. ACDelco RC27 Professional 15 P.S.I. Radiator Cap

ACDelco RC27 Professional 15 P.S.I. Radiator Cap

An AC Delco Professional, premium aftermarket Standard Type Radiator Cap is the high quality replacement ideal for many vehicles on the road today. It seals and pressurizes your vehicle’s cooling system as the radiator transfers heat from the engine’s coolant to the outside air.

This premium aftermarket replacement standard type radiator cap is manufactured to meet your expectations for fit, form, and function. seal and pressurize your vehicle’s cooling system as the radiator transfers heat from the engine’s coolant to the outside air

Highlighted Features:

  • fit most models of gm vehicles on the road today for more coverage
  • professional, premium aftermarket replacement radiator cap
  • provides the performance and dependability you expect from acdelco
  • manufactured to meet expectations for fit, form, and function
  • Fit type: Vehicle Specific

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3. Honda 19045-PAA-A01 Cap, Radiator

Honda 19045-PAA-A01 Cap, Radiator

Genuine Honda 19045-PAA-A01 Radiator Cap, This is the official Genuine Honda Parts replacement part for your vehicle. Typically this process takes 2-3 business days, during this time, however, unforeseen backorders or delays from the manufacturer can occur. Yes this is the right radiator cap unless the radiator was replaced with an aftermarket radiator.

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The only way you can tell if your radiator cap is bad, is to check it when it’s hot and after you turn your car off, see if it is leaking. if you have any questions regarding fitment please feel free to contact

Highlighted Features:

  • Package Dimension : 11 ” L x 7 ” W x 3 ” H
  • Country of Origin: CHINA
  • Model Number : 19045-PAA-A01
  • Item Package Weight : 2 pounds

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4. ACDelco RC85 GM Original Equipment 15 P.S.I. Radiator Cap

ACDelco RC85 GM Original Equipment 15 P.S.I. Radiator Cap

An AC Delco GM Original Equipment Radiator Cap is a spring loaded cap that seals the radiator filler neck or surge tank, and is a GM-recommended replacement for your vehicle’s original component. It maintains pressure on the cooling system while the engine is operating, which raises the boiling point of the engine coolant.

It also replenishes the system with coolant from the expansion tank (if equipped) when the engine cools off. This original equipment radiator cap has been manufactured to fit your GM vehicle, providing the same performance, durability, and service life you expect from General Motors.

Highlighted Features:

  • seal and maintain pressure on the cooling system for vehicle safety
  • raise the boiling point of the engine coolant to maintain efficiency
  • fit most models of gm vehicles for expanded coverage
  • gm recommended replacement part for your gm vehicle’s original factory component
  • offering the quality, reliability, and durability of gm oe
  • Fit type: Vehicle Specific

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5. TOYOTA Genuine Radiator Cap Sub Assembly

TOYOTA Genuine Radiator Cap Sub Assembly

Toyota Quality Assured, Genuine Toyota Parts OEM Only, Not After Market. At the top of the amazon page, in the search engine, you can put your vehicle year and make/model with a request for the parts available for your vehicle. It will take you to a site where all the parts will be listed. Look in the cooling system area. It will verify what cap you need to purchase

  • 1989/1995-2001 4Runner, 1991-2002 Camry, 2011 Camry Hybrid, 1978-1980/1990-2000 Celica, 1975-1980/1992-2014 Corolla, 2005-2008/2011-2012 Highlander, 2006-2007 Highlander HV, 2003-2014 Matrix, 1991-1999 Paseo,
  • 2004-2009 Prius, 2001-2008 Sequoia, 1999-2002 Solara, 1990-1993 Supra, 1993-1998 T100, 1980-1999 Tercel, 2000-2006 Tundra

Highlighted Features:

  • Genuine Toyota Product
  • A high quality OEM replacement toyota
  • Radiator Cap Sub Assembly
  • Backed by 1 year or 12k warranty which ever comes first

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6. Gates 31336 Radiator Cap

Gates 31336 Radiator Cap

Radiator Cap Upon checking the Gates website, the OE Infiniti QX80 part for the reservoir cap cross-referenced with this model. It is an exact fit and no signs of coolant leaks. Even though it is sold and boxed as a Gates product, it is actually manufactured by Motorad.

Highlighted Features:

  • Country of Origin : China
  • The Package Height of the Product is 3.02 inches
  • The Package Length of the Product is 7.53 inches
  • The Package Width of the Product is 5.58 inches

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7. ACDelco RC95 GM Original Equipment 15 P.S.I. Radiator Cap

ACDelco RC95 GM Original Equipment 15 P.S.I. Radiator Cap

An AC Delco GM Original Equipment Radiator Cap is a spring loaded cap that seals the radiator filler neck or surge tank, and is a GM-recommended replacement for your vehicle’s original component.

It maintains pressure on the cooling system while the engine is operating, which raises the boiling point of the engine coolant. It also replenishes the system with coolant from the expansion tank (if equipped) when the engine cools off.

This original equipment radiator cap has been manufactured to fit your GM vehicle, providing the same performance, durability, and service life you expect from General Motors.

Highlighted Features:

  • seal and maintain pressure on the cooling system for vehicle safety
  • raise the boiling point of the engine coolant to maintain efficiency
  • fit most models of gm vehicles for expanded coverage
  • gm-recommended replacement part for your gm vehicle’s original factory component
  • offering the quality, reliability, and durability of gm oe
  • Fit type: Vehicle Specific

Buy on Amazon

8. High Pressure Radiator Cap

High Pressure Radiator Cap

1981-2007 CR125R 1981-2007 CR250R 1984-2001 CR500R 1983-2002 CR80R 1996-2002 CR80RB Expert 2003-2007 CR85R, CR85RB Expert 2007-2009, 2012-2019 CRF150R, CRF150R Expert 2013-2017 CRF250L 2004-2019 CRF250R
2004-2009, 2012-2013, 2015-2017 CRF250X 2002-2019 CRF450R 2005-2009, 2012-2017,

Kawasaki : 1988-2006 KDX200. 1997-2005 KDX220R 1991-1994 KDX250 2000-2003, 2009-2010 KL250 Super Sherpa 1985-2005 KLR250 1987-2018 KLR650 1994-1996 KLX250R 2006-2007, 2009-2010, 2012-2014 KLX250S 2009-2010 KLX250SF 1997-2008 KLX300R 2008-2010, 2012 KLX450R 1993-1996 KLX650, KLX650R 1995-2009, 2011-2019 KX100 1982-2005 KX125 1983-2007 KX250 2004-2018 KX250F 2006-2018 KX450F 1985-2004 KX500 1985-2003 KX60 2000-2009, 2011-2019 KX65 1985-2000 KX80 1987-1994 KX80 Big Wheel 2001-2019 KX85

Suzuki : 2000-2004 DR-Z400 2000-2007 DR-Z400E 2000-2009, 2011-2018 DR-Z400S 2005-2009, 2013-2018 DR-Z400SM 1981-2007 RM125 1982-2008 RM250 2003-2005 RM65 1983-2001 RM80 2002-2009, 2012 RM85 2003-2008, 2012 RM85L 1989-1998 RMX250 2004-2018 RMZ250 2005-2018 RMZ450

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1 Year Warranty After Receiving. All Products Shipped Are Tested And Easy To Install. We Offer True Worry-free Shopping Experience. 100% Brand New And High Quality Guaranteed.

Highlighted Features:

  • The radiator caps are designed with a higher pressure rating than OEM caps to raise your coolants boiling point. 
  • Honda CR125R CRF250R CRF250X CRF450R XR650R. kawasaki KLR650 KX250 KX250F KX450 KX450F KX65, 
  • This high-pressure radiator cap will give you real-time temperature monitoring with accurate readings in both Celsius 
  • This 1.8 High Pressure Radiator Cap uses good steel materials and high-quality rubber, has good high temperature
  • Establish Strict Quality Control Standards, 1 Year Warranty, Worry-free Return And Refund Policy,

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9. Motorcraft – Cap Asy – Radiator (P) (RS527)

Motorcraft - Cap Asy - Radiator (P) (RS527)

Premium aftermarket replacement parts for Ford and Lincoln vehicles, Tested to provide performance and long-life reliability. Two-year unlimited mileage warranty, labor included and no commercial exceptions.

If you have an older powerstroke and haven’t replaced your radiator cap order this NOW. The older powerstrokes came with crappy radiator caps and don’t seal like they should especially when they age. And a radiator cap that doesn’t seal will lower the boiling point of the coolant than if the cap was sealed

Highlighted Features:

  • Leading Manufacturer Of High-Quality Products
  • International Renown For Our Diverse Range Of Award-Winning Products
  • Fully Equipped With State-Of-The-Art Technology
  • All Products Have Been Designed With The Professional In Mind
  • Constantly Modernizing Our Powerful Devices To Meet The Demands Of The Modern User

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10. 12R10S Professional 18 P.S.I. Safe Release Radiator Cap

12R10S Professional 18 P.S.I. Safe Release Radiator Cap

An AC Delco Professional, premium aftermarket Safety Release Radiator Cap is the high quality replacement ideal for many vehicles on the road today. It allows you to release radiator pressure prior to taking the cap off. This premium aftermarket replacement safety release radiator cap is manufactured to meet your expectations for fit, form, and function.

Highlighted Features:

  • Allows you to release radiator pressure prior to taking the cap off for added safety
  • Professional, premium aftermarket replacement radiator cap
  • Provides the performance and dependability you expect from ACDelco
  • Manufactured to meet expectations for fit, form, and function

Buy on Amazon

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