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Radiator Cap

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Radiator Cap, (E30/E31/E32/E34/E36/Z3 E36/Z8 E52 Chassis)
Vehicle Info Required to Guarantee Fit
$3.89
Product Details
Notes : Attaches to Expansion/Overflow Tank; Threaded filler neckRecommended Use : OE ReplacementMaximum Pressure : 30 lbs.Material : PlasticShape : RoundColor/Finish : BlackProduct Fit : Direct FitWarranty : 1-year unlimited-mileage warrantyQuantity Sold : Sold individually
Replacement Radiator Cap - REPA162001 - Round, 22 lbs., Blue, Plastic, Sold individually
Vehicle Info Required to Guarantee Fit
$3.35
Product Details
Notes : Threaded filler neckRecommended Use : OE ReplacementMaximum Pressure : 22 lbs.Material : PlasticShape : RoundColor/Finish : BlueProduct Fit : Direct FitWarranty : 1-year unlimited-mileage warrantyQuantity Sold : Sold individually
Replacement Radiator Cap and Radiator
Replacement
Part Number: KIT1-021417-27-B
Vehicle Info Required to Guarantee Fit
$110.34
Product Details
Notes : Threaded filler neckComponents : (1) Radiator, and (1) Radiator CapRecommended Use : OE ReplacementMaximum Pressure : 22 lbs.Material : PlasticShape : RoundColor/Finish : BlueProduct Fit : Direct FitWarranty : 1-year unlimited-mileage warrantyQuantity Sold : Kit
Replacement Radiator Cap, Radiator, Cooling Fan Assembly, Radiator Cap Kit
Vehicle Info Required to Guarantee Fit
$217.57
Product Details
Notes : Threaded filler neckComponents : (1) Radiator, (1) Radiator Cap, and (1) Radiator FanRecommended Use : OE ReplacementMaximum Pressure : 22 lbs.Material : PlasticShape : RoundColor/Finish : BlueProduct Fit : Direct FitWarranty : 1-year unlimited-mileage warrantyQuantity Sold : Kit
Replacement Radiator Cap - KIT1-020117-41-B - Round, 22 lbs., Blue, Plastic, Kit
Vehicle Info Required to Guarantee Fit
$59.90
Product Details
Components : (1) Radiator, and (1) Radiator CapRecommended Use : OE ReplacementMaximum Pressure : 22 lbs.Material : PlasticShape : RoundColor/Finish : BlueProduct Fit : Direct FitWarranty : 1-year unlimited-mileage warrantyQuantity Sold : Kit
Gates Radiator Cap - 31336 - Sold individually
Vehicle Info Required to Guarantee Fit
$11.26
Product Details
Product Fit : Direct FitAnticipated Ship Out Time : Same day - 1 business dayQuantity Sold : Sold individually
Gates Radiator Cap - 31528 - Sold individually
Vehicle Info Required to Guarantee Fit
$8.92
Product Details
Product Fit : Direct FitAnticipated Ship Out Time : Same day - 1 business dayQuantity Sold : Sold individually
Gates Radiator Cap - 31412 - Sold individually
Vehicle Info Required to Guarantee Fit
$11.46
Product Details
Product Fit : Direct FitAnticipated Ship Out Time : Same day - 1 business dayQuantity Sold : Sold individually
Gates Radiator Cap - 31523 - Sold individually
Vehicle Info Required to Guarantee Fit
$8.42
Product Details
Product Fit : Direct FitAnticipated Ship Out Time : Same day - 1 business dayQuantity Sold : Sold individually
Gates Radiator Cap - 31527 - Round, 13 lbs., Polished, Steel, Sold individually
Vehicle Info Required to Guarantee Fit
$8.64
Product Details
Recommended Use : OE ReplacementMaximum Pressure : 13 lbs.Material : SteelShape : RoundColor/Finish : PolishedProduct Fit : Direct FitFiller Neck Depth : 0.75 in.Warranty : Lifetime Gates limited warrantyAnticipated Ship Out Time : Same day - 1 business dayQuantity Sold : Sold individually
Gates Radiator Cap - 31535 - Sold individually
Vehicle Info Required to Guarantee Fit
$8.53
Product Details
Product Fit : Direct FitAnticipated Ship Out Time : Same day - 1 business dayQuantity Sold : Sold individually
Gates Radiator Cap - 31516 - Sold individually
Vehicle Info Required to Guarantee Fit
$9.70
Product Details
Product Fit : Direct FitAnticipated Ship Out Time : Same day - 1 business dayQuantity Sold : Sold individually
Gates Radiator Cap - 31532 - Sold individually
Vehicle Info Required to Guarantee Fit
$10.50
Product Details
Product Fit : Direct FitAnticipated Ship Out Time : Same day - 1 business dayQuantity Sold : Sold individually
Gates Radiator Cap - 31329 - Round, 22 psi, Green, Plastic, Sold individually
Vehicle Info Required to Guarantee Fit
$11.56
Product Details
Recommended Use : OE ReplacementMaximum Pressure : 22 psiMaterial : PlasticShape : RoundColor/Finish : GreenProduct Fit : Direct FitSeries : Gates OE ReplacementWarranty : Lifetime Gates limited warrantyAnticipated Ship Out Time : Same day - 1 business dayQuantity Sold : Sold individually
Gates Radiator Cap - 31333 - Round, 13 lbs., Polished, Steel, Sold individually
Vehicle Info Required to Guarantee Fit
$11.53
Product Details
Recommended Use : OE ReplacementMaximum Pressure : 13 lbs.Material : SteelShape : RoundColor/Finish : PolishedProduct Fit : Direct FitFiller Neck Depth : 0.63 in.Warranty : Lifetime Gates limited warrantyAnticipated Ship Out Time : Same day - 1 business dayQuantity Sold : Sold individually
Page 1 of 11 | Showing 1 - 15 of 161 results

Radiator Cap Guides





Put a lid on it. Sometimes, the simplest things can bring about the worst problems in your car. Take the radiator cap, for instance. Most people think that it's just a plain old cap that prevents coolant from leaking out the radiator. In fact, it's more than that. It's actually a pressure valve.According to the laws of physics, by increasing the pressure of a fluid, you also increase its boiling point. Thus, the cap causes an increase in pressure as well as the coolant's boiling point, making it more effective at absorbing heat.As you shut off your engine, the radiator cap does the opposite. It senses the pressure decrease and lets air in to stabilize your cooling system. The cap, however, is prone to rust and corrosion. Its rubber seals can wear out as well. These will keep the cap from functioning properly.If your car's engine overheats quite frequently, you may need a new cap. Carparts can provide one for you.


• A premium radiator cap keeps the cooling system pressure in check,

• Our radiator caps prevent steam from escaping and damaging electrical systems.

• Our radiator caps are crafted only from corrosion-resistant, heat-resistant materials.

How to Troubleshoot and Fix Your Leaking Radiator Cap

Your car’s temperature control system is able to work efficiently with the help of pressure. Pressure is safely contained in your radiator, thanks to a spring-loaded cap. Overtime, extreme heat and pressure will take its toll on your radiator cap and cause it to wear and get damaged. If the problem is left unchecked, your cap may start to cause a coolant leak, which can eventually lead to engine overheating. Overheating is perhaps every car driver’s worst nightmare; so, to prevent this from happening to you, make sure you address your faulty radiator cap right away. Below are some basic steps that you can follow to easily replace the busted cap in your system.

Difficulty Level: Moderate

Things you’ll need:

  • Gloves
  • Hand towel
  • Coolant system pressure tester
  • Replacement radiator cap

Tips and Warnings:

  • Never conduct a test to see if your radiator cap is busted when the engine is hot. This can cause you some serious burns.
  • For the best results, we recommend that you use an OEM part for your repairs. This will ensure excellent fit and easy installation.

Step 1: Open your hood and put a towel on top of the radiator cap. Start removing the cap by pushing it down and twisting it to the left (counterclockwise).

Step 2: After that, get the pressure tester and screw the cap adapter on it. Once you’ve secured their connection, attach your radiator cap at the other end of the adapter.

Step 3: Next, start running the tester by pumping its handle. Do this until the tester’s gauge registers 15 lbs.

Step 4: Once you’ve stopped pumping, watch the gauge and see if the number starts to drop. If it does, this means you have a busted radiator cap.

Step 5: Throw your old cap and get its replacement. Attach and secure it in place by turning it to the right (clockwise).

Step 6: After tightening it, keep the hood open and start your engine. Check your new cap for any bubbling or discharge while keeping a safe distance from your radiator.

Helpful Automotive Resources

Main Components of Your Cooling System
May 04, 2019
Main Components of Your Cooling System4. HEAD GASKET /TIMING COVER GASKET: Seals the major parts of the engine. Prevents oil, anti-freeze and cylinder pressure from mixing together.
How to Clean a Radiator
March 11, 2020
How to Clean a RadiatorThere are two ways to clean the radiator: internally and externally. The latter involves cleaning the radiator fins located on the outside while the former has to do with flushing out old fluid and all the buildup that may have accumulated inside of the radiator.
How to Replace a Faulty Radiator
July 24, 2019
How to Replace a Faulty RadiatorTo prevent issues with coolant delivery, it’s best to replace the coolant between 25,000 to 40,000 miles. How Do You Flush a Radiator?
6 Signs of a Bad Radiator
July 23, 2019
6 Signs of a Bad RadiatorYou might notice coolant leaking under the vehicle. It can be a red, yellow, or green fluid. When the radiator is leaking, coolant levels become too low, and when there isn’t enough coolant to reduce the heat, the engine might become too hot.
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