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Radiator Caps

The radiator cap is a small but important component of your vehicle’s cooling system. When functioning properly, the cap keeps contaminates and excess air out of your...

The radiator cap is a small but important component of your vehicle’s cooling system. When functioning properly, the cap keeps contaminates and excess air out of your cooling system. Excess air in the system reduces cooling efficiency and can lead to problems like engine overheating.

Most radiator caps for modern applications are designed to let a specified amount of pressure build in the system as the coolant heats up and expands. If the system’s pressure exceeds the specified radiator cap pressure, a valve in the cap opens to let coolant flow into the coolant reservoir. As the coolant temperature decreases and the system...

The radiator cap is a small but important component of your vehicle’s cooling system. When functioning properly, the cap keeps contaminates and excess air out of your cooling system. Excess air in the system reduces cooling efficiency and can lead to problems like engine overheating.

Most radiator caps for modern applications are designed to let a specified amount of pressure build in the system as the coolant heats up and expands. If the system’s pressure exceeds the specified radiator cap pressure, a valve in the cap opens to let coolant flow into the coolant reservoir. As the coolant temperature decreases and the system pressure drops, the cap allows the coolant to return to the main cooling system. For added safety, some caps come equipped with pressure-release levers to vent excess pressure before the cap is removed.

If you’re experiencing cooling problems, you may want to start with a new radiator cap. We have you covered with a wide selection of stock replacement radiator caps for just about anything you drive. We also carry radiator caps with built-in temperature gauges so you know just what’s happening inside your cooling system. When it’s time to upgrade to an aftermarket aluminum radiator, top it off with a billet aluminum radiator cap in a variety of eye-catching finishes such as natural, chrome, polished, and anodized colors to complement your engine bay.

You can shop radiator caps with pressure ratings from 0 to 42 psi in a variety of styles from trusted brands like Stant, Moroso, Be Cool, Meziere, and more. And remember, everything we sell is backed by the best customer service in the industry.

Showing In Stock Items. Show All 19 Items.

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Results 1 - 17 of 17

MotoRad Lev-R-Vent Radiator Caps ST16V

MotoRad Lev-R-Vent Radiator Caps ST16V

MotoRad Lev-R-Vent Radiator Caps ST16V

Radiator Cap, Lev-R-Vent, Stainless Steel, Natural, Stant, 16 psi, Buick, Chevy, Chrysler, Dodge, GMC, Each

Part Number: SNN-ST16V

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Monday 2/2/2026

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Estimated Ship Date: Monday 2/2/2026

MotoRad Radiator Caps T16

MotoRad Radiator Caps T16

MotoRad Radiator Caps T16

Radiator Cap, Stainless Steel, Natural, Stant, 16 psi, Chevy, Chrysler, Dodge, Jeep, Ram, Each

Part Number: SNN-T16

4.67 out of 5 stars ( 3 )

Estimated Ship Date: Monday 2/2/2026

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Estimated Ship Date: Monday 2/2/2026

MotoRad Lev-R-Vent Radiator Caps ST16

MotoRad Lev-R-Vent Radiator Caps ST16

MotoRad Lev-R-Vent Radiator Caps ST16

Radiator Cap, Lev-R-Vent, Stainless Steel, Natural, Stant, 16 psi, Chevy, Chrysler, Dodge, Jeep, Mini, Ram, Each

Part Number: SNN-ST16

4.67 out of 5 stars ( 3 )

Estimated Ship Date: Monday 2/2/2026

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Estimated Ship Date: Monday 2/2/2026

MotoRad Radiator Caps T16V

MotoRad Radiator Caps T16V

MotoRad Radiator Caps T16V

Radiator Cap

Part Number: SNN-T16V

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 2/2/2026

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Estimated Ship Date: Monday 2/2/2026

ACDelco Radiator Caps 25661994

ACDelco Radiator Caps 25661994

ACDelco Radiator Caps 25661994

Radiator Cap, Steel, Natural, Standard, Street, 15 psi, Each

Part Number: ADO-RC81

4.88 out of 5 stars ( 8 )

Estimated Ship Date: Monday 2/2/2026

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Estimated Ship Date: Monday 2/2/2026

ACDelco Radiator Caps 06410206

ACDelco Radiator Caps 06410206

ACDelco Radiator Caps 06410206

Radiator Cap, Round, Zinc, 15 psi, Plain Logo, Each

Part Number: ADO-RC26

3.67 out of 5 stars ( 3 )

Estimated Ship Date: Monday 2/2/2026

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Estimated Ship Date: Monday 2/2/2026

ACDelco Radiator Caps 15982188

ACDelco Radiator Caps 15982188

ACDelco Radiator Caps 15982188

Radiator Cap, Round, Plastic, Black/Orange, 15 psi, Each

Part Number: ADO-15982188

5.0 out of 5 stars ( 3 )

Estimated Ship Date: Monday 2/2/2026

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Estimated Ship Date: Monday 2/2/2026

ACDelco Radiator Caps 00850800

ACDelco Radiator Caps 00850800

ACDelco Radiator Caps 00850800

Radiator Cap, Stainless Steel, 13 psi, Plain Logo, Each

Part Number: ADO-RC6

1.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 2/2/2026

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Estimated Ship Date: Monday 2/2/2026

ACDelco Radiator Caps for 1993 BERETTA, CORSICA, 1999 INTRIGUE - 25713160

ACDelco Radiator Caps for 1993 BERETTA, CORSICA, 1999 INTRIGUE - 25713160

ACDelco Radiator Caps for 1993 BERETTA, CORSICA, 1999 INTRIGUE - 25713160

Radiator Cap, Plastic, 18 psi, Plain Logo, Each

Part Number: ADO-RC87

4.67 out of 5 stars ( 3 )

Estimated Ship Date: Monday 2/2/2026

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Estimated Ship Date: Monday 2/2/2026

ACDelco Radiator Caps 15075118

ACDelco Radiator Caps 15075118

ACDelco Radiator Caps 15075118

Radiator Cap, Plastic, 15 psi, Plain Logo, Each

Part Number: ADO-RC98

5.0 out of 5 stars ( 4 )

Estimated Ship Date: Monday 2/2/2026

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Estimated Ship Date: Monday 2/2/2026

ACDelco Radiator Caps 13502509

ACDelco Radiator Caps 13502509

ACDelco Radiator Caps 13502509

Radiator Cap, Stainless Steel/Plastic, Black, 20 psi, Cadillac, Each

Part Number: ADO-RC115

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Monday 2/2/2026

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Estimated Ship Date: Monday 2/2/2026

Flex-A-Lite Billet Aluminum Radiator Caps 126844

Flex-A-Lite Billet Aluminum Radiator Caps 126844

Flex-A-Lite Billet Aluminum Radiator Caps 126844

Radiator Cap, Round, 16 psi Maximum Pressure, Billet Aluminum, Black, Flex-A-Lite Logo, Buick, Cadillac, Chevy, Chrysler, Ford, GMC, Volkswagen, Each

Part Number: FLX-126844

Not Yet Reviewed

Estimated Ship Date: Monday 2/2/2026

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Estimated Ship Date: Monday 2/2/2026

ACDelco Radiator Caps 25730158

ACDelco Radiator Caps 25730158

ACDelco Radiator Caps 25730158

Radiator Cap, Stainless Steel, 15 psi, Plain Logo, Each

Part Number: ADO-RC96

Not Yet Reviewed

Estimated Ship Date: Monday 2/2/2026

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Estimated Ship Date: Monday 2/2/2026

ACDelco Radiator Caps 15042975

ACDelco Radiator Caps 15042975

ACDelco Radiator Caps 15042975

Radiator Cap, Plastic, 15 psi, Plain Logo, Each

Part Number: ADO-RC85

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Monday 2/2/2026

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Estimated Ship Date: Monday 2/2/2026

Flex-A-Lite Billet Aluminum Radiator Caps 126845

Flex-A-Lite Billet Aluminum Radiator Caps 126845

Flex-A-Lite Billet Aluminum Radiator Caps 126845

Radiator Cap, Round, 16 psi Maximum Pressure, Billet Aluminum, Black, Flex-A-Lite Logo, for use on Acura®, BMW, Chevy, Chrysler, Ford, GMC, Saab, Each

Part Number: FLX-126845

4.0 out of 5 stars ( 1 )

Estimated Ship Date: Feb 16, 2026 if ordered today

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Estimated Ship Date: Feb 16, 2026 if ordered today

ACDelco Radiator Caps 15293434

ACDelco Radiator Caps 15293434

ACDelco Radiator Caps 15293434

Radiator Cap, Plastic, 18 psi, Plain Logo, Each

Part Number: ADO-RC111

Not Yet Reviewed

Estimated Ship Date: Monday 2/2/2026

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Estimated Ship Date: Monday 2/2/2026

Chevrolet Performance - Radiator Caps for 2005-2007 COBALT, 2004-2007 ION, 2014-2019 XTS - 15076936

Chevrolet Performance - Radiator Caps for 2005-2007 COBALT, 2004-2007 ION, 2014-2019 XTS - 15076936

Chevrolet Performance - Radiator Caps for 2005-2007 COBALT, 2004-2007 ION, 2014-2019 XTS - 15076936

F-CAP ASM

Part Number: NAL-15076936

Not Yet Reviewed

Estimated Ship Date: May 29, 2026 if ordered today

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Estimated Ship Date: May 29, 2026 if ordered today

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