How to Inspect and Replace a Radiator Cap on Jeep Wrangler?

If you hold the radiator cap upright and make sure the lower vent valve is opening, you can safely check it. If a swollen rubber gasket keeps the vent valve from opening, you should change the cap. After that, place the cap face down with the opening pointing at your eyes; if there is light between the valve and the gasket, you should replace it. It helps to replace the damaged cap with one that lacks a spring to keep the vent closed. The new radiator cap ought to fit the overflow system, have a sealed diaphragm spring and a rubber gasket that seals at the top of the radiator filler neck. The cap you use will control how the coolant gets back to the radiator.

Is Your Radiator Cap in Need of Replacement? How to Inspect and Decide on Jeep Patriot?

Stand the radiator cap upright; if the vent valve at the bottom opens, change it out. Should the rubber seal 5 swell and block the valve, you should replace the follow-up cap as well. Following this, turn the cleaned cap upside down and look for any light between vent valve 6 and rubber seal 5; if light appears, change the cap. A special replacement cap should always be used in a full pressure coolant system to direct the coolant back to the radiator.

OEM Jeep Radiator Cap

Cooling Radiator Cap

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15 Radiator Caps found

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Jeep Radiator Cap Part Number: 5278767AB
$18.07 MSRP: $26.45
You Save: $8.38 (32%)
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Product Specifications
- Other Name: Cap - Radiator; Engine Coolant Reservoir Cap; Reservoir Cap; Filler Cap; Cap; Cap Radiator
- Replaces: 5278767AA, 5183710AA
Fits the following Jeep Models:
- Grand Cherokee | 2013-2015 | Limited, Overland, Summit | 3.0L V6, 6 Cyl 3.0 L DIESEL
- Liberty | 2008-2012
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Jeep Radiator Cap Part Number: 52028974AA
$23.88 MSRP: $35.00
You Save: $11.12 (32%)
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Product Specifications
- Other Name: Cap - Radiator; Engine Coolant Reservoir Cap; Reservoir Cap; Cap; Cap Radiator
Fits the following Jeep Models:
- Grand Cherokee | 2012-2021, 1999-2003 | High Altitude, Laredo, Limited, Limited X, Overland, Overland Summit, SRT, SRT8, Sport, Summit, Trailhawk | 6 Cyl 3.0 L DIESEL, 6 Cyl 3.6 L FLEX, 8 Cyl 4.7 L GAS, 8 Cyl 5.7 L GAS, 8 Cyl 6.4 L GAS
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Jeep Radiator Cap Part Number: 52079880AA
$15.68 MSRP: $22.95
You Save: $7.27 (32%)
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Product Specifications
- Other Name: Cap - Radiator; Cap; Cap Radiator
- Replaces: 4677493AA
Fits the following Jeep Models:
- CJ7 | 1984-1986 | Base, Laredo, Renegade | 4 Cyl 2.5 L GAS, 6 Cyl 4.2 L GAS
- Cherokee | 1985-2001 | Base, Briarwood, Chief, Classic, Country, Laredo, Limited, Pioneer, SE, Sport | 4 Cyl 2.1 L DIESEL, 4 Cyl 2.5 L GAS, 6 Cyl 2.8 L GAS, 6 Cyl 4.0 L GAS
- Comanche | 1990-1992 | Base, Pioneer | 4 Cyl 2.5 L GAS
- Grand Cherokee | 1993-1996 | Base, Laredo, Limited, Orvis, SE | 6 Cyl 4.0 L GAS, 8 Cyl 5.2 L GAS
- Grand Wagoneer | 1993, 1984-1991 | Base, Limited | 6 Cyl 4.2 L GAS, 8 Cyl 5.2 L GAS, 8 Cyl 5.9 L GAS
- J10 | 1984-1988 | Base | 6 Cyl 4.2 L GAS, 8 Cyl 5.9 L GAS
- J20 | 1984-1988 | Base | 8 Cyl 5.9 L GAS
- Scrambler | 1984-1986 | Base, Laredo, Renegade, SR | 4 Cyl 2.5 L GAS, 6 Cyl 4.2 L GAS
- Wagoneer | 1985-1990 | Base, Limited | 4 Cyl 2.1 L DIESEL, 4 Cyl 2.5 L GAS, 6 Cyl 2.8 L GAS, 6 Cyl 4.0 L GAS
- Wrangler | 1994-1995 | Renegade, Rio Grande, S, SE, Sahara | 4 Cyl 2.5 L GAS, 6 Cyl 4.0 L GAS
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Jeep Expansion Tank, Front Part Number: 68442532AA
$22.40 MSRP: $32.75
You Save: $10.35 (32%)
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Product Specifications
- Other Name: Cap - Coolant Recovery Bottle; Engine Coolant Reservoir Cap, Front; Engine Coolant Reservoir Cap; Radiator Cap; Reservoir Cap; Cap; Cap Coolant Recovery Bottle
- Position: Front
- Replaces: 68096261AA, 68249136AA
Fits the following Jeep Models:
- Cherokee | 2014-2023 | 75th Anniversary, 80th Anniversary, Altitude, Altitude Lux, High Altitude, Latitude, Latitude Lux, Latitude Plus, Limited, Overland, Sport, Trailhawk, Trailhawk Elite, Upland, X | 4 Cyl 2.0 L GAS, 4 Cyl 2.4 L GAS, 6 Cyl 3.2 L GAS
- Compass | 2017-2025 | 80th Anniversary, Altitude, High Altitude, Latitude, Latitude Lux, Limited, Red, Sport, Trailhawk, Upland | 4 Cyl 2.0 L GAS, 4 Cyl 2.4 L GAS
- Gladiator | 2020-2025 | 80th Anniversary, Altitude, Freedom, High Altitude, High Tide, Jeep Beach, Launch Edition, Mojave, Mojave X, NightHawk, Overland, Rubicon, Rubicon X, Sport, Sport S, Texas Trail, Willys, Willys Sport | 6 Cyl 3.0 L DIESEL, 6 Cyl 3.6 L GAS
- Grand Cherokee | 2022-2025, 2016-2019 | 30th Anniversary 4xe, 4xe, Altitude, Altitude X, Anniversary Edition 4xe, High Altitude, Laredo, Laredo X, Limited, Overland, Summit, Summit Reserve, Trackhawk, Trailhawk | 4 Cyl 2.0 L PLUG-IN HYBRID EV-GAS (PHEV), 6 Cyl 3.0 L DIESEL, 6 Cyl 3.6 L FLEX, 6 Cyl 3.6 L GAS, 8 Cyl 5.7 L GAS, 8 Cyl 6.2 L GAS
- Grand Cherokee L | 2021-2025 | Altitude, Altitude X, Laredo, Laredo X, Limited, Overland, Summit, Summit Reserve | 6 Cyl 3.6 L FLEX, 6 Cyl 3.6 L GAS, 8 Cyl 5.7 L GAS
- Grand Wagoneer | 2022-2025 | Base, Obsidian, Series I, Series II, Series III, Series III Obsidian | 6 Cyl 3.0 L GAS, 8 Cyl 6.4 L GAS
- Grand Wagoneer L | 2023-2025 | Base, Obsidian, Series II, Series III, Series III Obsidian | 6 Cyl 3.0 L GAS
- Renegade | 2015-2023 | 75th Anniversary, 80th Anniversary, Altitude, Dawn Of Justice, High Altitude, Islander, Jeepster, Latitude, Limited, Red, Sport, Trailhawk, Upland | 4 Cyl 1.3 L GAS, 4 Cyl 1.4 L GAS, 4 Cyl 2.4 L FLEX, 4 Cyl 2.4 L GAS
- Wagoneer | 2023-2025 | Base, Carbide, Series II, Series III | 6 Cyl 3.0 L GAS
- Wagoneer L | 2023-2025 | Base, Carbide, Series II, Series III | 6 Cyl 3.0 L GAS
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Jeep Radiator Cap Part Number: 4596198
$26.33 MSRP: $37.85
You Save: $11.52 (31%)
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Product Specifications
- Other Name: Cap - Radiator; Engine Coolant Reservoir Cap; Reservoir Cap; Recovery Tank Cap; Cap for Coolant Recovery Bottle; Radiator Cap 04596198
- Replaces: 5086226AA
Fits the following Jeep Models:
- Commander | 2006-2010 | 65th Anniversary Edition, Base, Limited, Overland, Sport | 6 Cyl 3.7 L GAS, 8 Cyl 4.7 L FLEX, 8 Cyl 4.7 L GAS, 8 Cyl 5.7 L GAS
- Compass | 2007-2017 | 75th Anniversary, Altitude, Base, High Altitude, Latitude, Limited, Sport | 4 Cyl 2.0 L GAS, 4 Cyl 2.4 L GAS
- Grand Cherokee | 2004-2011 | 65th Anniversary Edition, Laredo, Limited, Overland, Special Edition | 6 Cyl 3.0 L DIESEL, 6 Cyl 3.6 L FLEX, 6 Cyl 3.7 L GAS, 8 Cyl 4.7 L FLEX, 8 Cyl 4.7 L GAS, 8 Cyl 5.7 L GAS
- Liberty | 2002-2012 | 65th Anniversary Edition, Jet, Limited, Renegade, Rocky Mountain Edition, Sport | 6 Cyl 3.7 L GAS
- Patriot | 2007-2017 | 75th Anniversary, Latitude, Latitude X, Limited, Sport | 4 Cyl 2.0 L GAS, 4 Cyl 2.4 L GAS
- Wrangler | 2008-2017 | 70th Anniversary, 75th Anniversary, Rubicon, Sahara, Sport, Sport S, Unlimited 70th Anniversary, Unlimited 75th Anniversary, Unlimited Rubicon, Unlimited Sahara, Unlimited Sport, Unlimited Sport S, Unlimited X, X, X-S | 6 Cyl 3.6 L GAS, 6 Cyl 3.8 L GAS
- Wrangler JK | 2018 | Rubicon, Sahara, Sport, Sport S, Unlimited Rubicon, Unlimited Sahara, Unlimited Sport, Unlimited Sport S | 6 Cyl 3.6 L GAS
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Jeep Serpentine Belt Part Number: 55111074AC
$24.19 MSRP: $48.85
You Save: $24.66 (51%)
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Product Specifications
- Other Name: Cap - Coolant Recovery Bottle; Engine, Washer, Radiator Caps; Serpentine & V-Belts; Reservoir Cap; Filler Cap; Reservoir Tank Cap; Recovery Tank Cap; Cap
- Replaces: 55111074AA, 4682828, 5017468AA, 55111074AB
Fits the following Jeep Models:
- Cherokee | 1985-1999 | Base, Briarwood, Chief, Classic, Country, Laredo, Limited, Pioneer, SE, Sport | 4 Cyl 2.1 L DIESEL, 4 Cyl 2.5 L GAS, 6 Cyl 2.8 L GAS, 6 Cyl 4.0 L GAS
- Comanche | 1986-1992 | Base, Chief, Custom, Eliminator, Laredo, Pioneer, X, XLS | 4 Cyl 2.1 L DIESEL, 4 Cyl 2.5 L GAS, 6 Cyl 2.8 L GAS, 6 Cyl 4.0 L GAS
- Commander | 2008-2010 | Limited, Overland, Sport | 3.7L V6, 4.7L V8, 5.7L V8, 6 Cyl 3.7 L GAS, 8 Cyl 4.7 L FLEX, 8 Cyl 4.7 L GAS, 8 Cyl 5.7 L GAS
- Compass | 2007-2017 | 75th Anniversary, Altitude, Base, High Altitude, Latitude, Limited, Sport | 2.0L L4, 2.4L L4, 4 Cyl 2.0 L GAS, 4 Cyl 2.4 L GAS
- Grand Cherokee | 2008-2010 | Laredo, Limited, Overland, SRT8 | 3.7L V6, 4.7L V8, 5.7L V8, 6 Cyl 3.7 L GAS, 6.1L V8, 8 Cyl 4.7 L FLEX, 8 Cyl 4.7 L GAS, 8 Cyl 5.7 L GAS, 8 Cyl 6.1 L GAS
- Liberty | 2007 | 3.7L V6
- Patriot | 2007-2017 | 75th Anniversary, Latitude, Latitude X, Limited, Sport | 2.0L L4, 2.4L L4, 4 Cyl 2.0 L GAS, 4 Cyl 2.4 L GAS
- Wagoneer | 1985-1990 | Base, Limited | 4 Cyl 2.1 L DIESEL, 4 Cyl 2.5 L GAS, 6 Cyl 2.8 L GAS, 6 Cyl 4.0 L GAS
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Jeep Reservoir Cap Part Number: 68490271AA
$14.59 MSRP: $21.40
You Save: $6.81 (32%)
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Product Specifications
- Other Name: Cap - Low Temperature Coolant Bot; Engine Coolant Reservoir Cap; Radiator Cap; Cap
Fits the following Jeep Models:
- Compass | 2023-2025 | Altitude, High Altitude, Latitude, Latitude Lux, Limited, Red, Sport, Trailhawk | 4 Cyl 2.0 L GAS
- Wrangler | 2021-2025 | Freedom, Rubicon, Rubicon X, Sport, Sport S, Unlimited Freedom, Unlimited High Altitude, Unlimited High Altitude 4xe, Unlimited Rubicon, Unlimited Rubicon 4xe, Unlimited Rubicon X, Unlimited Rubicon X 4xe, Unlimited Sahara, Unlimited Sahara 4xe, Unlimited Sahara Altitude, Unlimited Sport, Unlimited Sport Altitude, Unlimited Sport S, Unlimited Sport S 4xe, Unlimited Willys, Unlimited Willys 4xe, Unlimited Willys Sport, Willys, Willys Sport | 4 Cyl 2.0 L GAS, 4 Cyl 2.0 L PLUG-IN HYBRID EV-GAS (PHEV)
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Jeep Radiator Cap Part Number: 68365281AA
$38.02 MSRP: $55.65
You Save: $17.63 (32%)
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Product Specifications
- Other Name: Cap - Radiator; Cap Radiator
Fits the following Jeep Models:
- Grand Cherokee | 2018-2021 | Trackhawk | 8 Cyl 6.2 L GAS
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Jeep Radiator Cap Part Number: 52014479AB
$17.84 MSRP: $26.10
You Save: $8.26 (32%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Cap - Radiator
- Replaces: 52014479AA
Fits the following Jeep Models:
- Wagoneer | 2022-2023 | Base, Series I, Series I Carbide, Series II, Series II Carbide, Series III, Series III Carbide | 8 Cyl 5.7 L MILD HYBRID EV-GAS (MHEV)
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Jeep Radiator Cap Part Number: 55116901AA
$16.24 MSRP: $23.35
You Save: $7.11 (31%)
Product Specifications
- Other Name: Cap - Radiator; Engine Coolant Reservoir Cap; Reservoir Cap; Cap; Cap Radiator
- Replaces: 52079799AA
Fits the following Jeep Models:
- Grand Cherokee | 1993-2004 | 5.9 Limited, Base, Laredo, Limited, Orvis, SE, Special Edition, Sport, TSi | 4.0L V6, 6 Cyl 4.0 L GAS, 8 Cyl 5.2 L GAS, 8 Cyl 5.9 L GAS
- Liberty | 2002-2005 | Sport | 2.4L L4, 4 Cyl 2.4 L GAS
- Wrangler | 1997-2007 | 65th Anniversary Edition, Rubicon, SE, Sahara, Sport, Unlimited, Unlimited Rubicon, Unlimited Sahara, Unlimited X, X | 2.4L L4, 2.5L L4, 4 Cyl 2.4 L GAS, 4 Cyl 2.5 L GAS, 4.0L L6, 6 Cyl 3.8 L GAS, 6 Cyl 4.0 L GAS
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Jeep Radiator Cap Part Number: J5364692
Product Specifications
- Other Name: Cap Radiator; Cap, Radiator
Fits the following Jeep Models:
- Cherokee | 1985-1987 | Base, Chief, Laredo, Pioneer | 4 Cyl 2.1 L DIESEL
- Comanche | 1986-1987 | Base, Custom, Laredo, Pioneer, X, XLS | 4 Cyl 2.1 L DIESEL
- Wagoneer | 1985 | Base, Limited | 4 Cyl 2.1 L DIESEL
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Jeep Radiator Cap Part Number: J3239375AB
Product Specifications
- Other Name: Cap - Radiator; Cap
Fits the following Jeep Models:
- Cherokee | 1985-1996 | Base, Briarwood, Chief, Classic, Country, Laredo, Limited, Pioneer, SE, Sport | 4 Cyl 2.1 L DIESEL, 4 Cyl 2.5 L GAS, 6 Cyl 2.8 L GAS, 6 Cyl 4.0 L GAS
- Comanche | 1986-1992 | Base, Chief, Custom, Eliminator, Laredo, Pioneer, X, XLS | 4 Cyl 2.1 L DIESEL, 4 Cyl 2.5 L GAS, 6 Cyl 2.8 L GAS, 6 Cyl 4.0 L GAS
- Wagoneer | 1985-1990 | Base, Limited | 4 Cyl 2.5 L GAS, 6 Cyl 2.8 L GAS, 6 Cyl 4.0 L GAS
- Wrangler | 1987-1993 | Base, Islander, Laredo, Renegade, S, Sahara, Sport | 4 Cyl 2.5 L GAS, 6 Cyl 4.0 L GAS, 6 Cyl 4.2 L GAS
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Jeep Radiator Cap Part Number: J3239375
Product Specifications
- Other Name: Cap - Radiator; Cap, Radiator
Fits the following Jeep Models:
- Cherokee | 1984-1995 | Base, Briarwood, Chief, Country, Laredo, Limited, Pioneer, SE, Sport | 4 Cyl 2.5 L GAS, 6 Cyl 2.8 L GAS, 6 Cyl 4.0 L GAS
- Comanche | 1986-1992 | Base, Chief, Custom, Eliminator, Laredo, Pioneer, X, XLS | 4 Cyl 2.5 L GAS, 6 Cyl 2.8 L GAS, 6 Cyl 4.0 L GAS
- Wagoneer | 1984-1990 | Base, Limited | 6 Cyl 2.8 L GAS, 6 Cyl 4.0 L GAS
- Wrangler | 1987-1993 | Base, Islander, Laredo, Renegade, S, Sahara, Sport | 4 Cyl 2.5 L GAS, 6 Cyl 4.0 L GAS, 6 Cyl 4.2 L GAS
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Jeep Reservoir Cap Part Number: 68388115AB
$15.95 MSRP: $22.95
You Save: $7.00 (31%)
Product Specifications
- Other Name: Cap - Coolant Recovery Bottle; Engine Coolant Reservoir Cap; Radiator Cap; Cap; Cap Coolant Recovery Bottle
- Replaces: 68388115AA
Fits the following Jeep Models:
- Wrangler | 2018-2025 | 80th Anniversary, Freedom, Islander, Rubicon, Rubicon X, Sport, Sport S, Unlimited 80th Anniversary, Unlimited Freedom, Unlimited High Altitude, Unlimited High Altitude 4xe, Unlimited Islander, Unlimited Rubicon, Unlimited Rubicon 4xe, Unlimited Rubicon X, Unlimited Rubicon X 4xe, Unlimited Sahara, Unlimited Sahara 4xe, Unlimited Sahara Altitude, Unlimited Sport, Unlimited Sport Altitude, Unlimited Sport S, Unlimited Sport S 4xe, Unlimited Willys, Unlimited Willys 4xe, Unlimited Willys Sport, Willys, Willys Sport | 2.0L L4, 4 Cyl 2.0 L GAS, 4 Cyl 2.0 L MILD HYBRID EV-GAS (MHEV), 4 Cyl 2.0 L PLUG-IN HYBRID EV-GAS (PHEV)
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Jeep Expansion Tank Part Number: 68290247AA
$26.45 MSRP: $38.00
You Save: $11.55 (31%)
Product Specifications
- Other Name: Cap - Low Temperature Coolant Bot; Drive Motor Inverter Reservoir Cap; Engine Coolant Cap; Radiator Cap; Reservoir Cap; Cap; Cap Coolant Recovery Bottle
- Replaces: 68272801AA
Fits the following Jeep Models:
- Grand Cherokee | 2022-2025 | 30th Anniversary 4xe, 4xe, Anniversary Edition 4xe | 4 Cyl 2.0 L PLUG-IN HYBRID EV-GAS (PHEV)
- Grand Wagoneer | 2022-2025 | Base, Obsidian, Series I, Series II, Series III, Series III Obsidian | 6 Cyl 3.0 L GAS
- Grand Wagoneer L | 2023-2025 | Base, Obsidian, Series II, Series III, Series III Obsidian | 6 Cyl 3.0 L GAS
- Wagoneer | 2023-2025 | Base, Carbide, Series II, Series III | 6 Cyl 3.0 L GAS
- Wagoneer L | 2023-2025 | Base, Carbide, Series II, Series III | 6 Cyl 3.0 L GAS
- Wrangler | 2018-2023 | 80th Anniversary, Freedom, Islander, Rubicon, Sport, Sport S, Unlimited 80th Anniversary, Unlimited Freedom, Unlimited High Altitude, Unlimited High Tide, Unlimited Islander, Unlimited Moab, Unlimited Rubicon, Unlimited Sahara, Unlimited Sahara Altitude, Unlimited Sport, Unlimited Sport Altitude, Unlimited Sport S, Unlimited Willys, Unlimited Willys Sport, Willys, Willys Sport | 4 Cyl 2.0 L GAS, 4 Cyl 2.0 L MILD HYBRID EV-GAS (MHEV), 6 Cyl 3.6 L GAS, 6 Cyl 3.6 L MILD HYBRID EV-GAS (MHEV)
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Jeep Radiator Cap

OEM parts sourced directly from Jeep deliver superior quality, long lasting strength, and a precise fit you can trust. Each item goes through strict quality checks to ensure safety, toughness, and performance that matches your factory equipment. At JeepPartsDeal online shop, you'll get top-quality, budget-friendly OEM Jeep Radiator Cap for your vehicle. We focus on giving you a high standard without pushing up the price. Our full selection of genuine factory products comes backed by the original manufacturer's warranty. You'll love our fast delivery, seamless shopping experience, and convenient return policy, saving you all the hassle.

Jeep Radiator Cap keeps the coolant cool and under constant pressure to keep the engines cool in hot seasons. Jeep was born of warlike substance and soon became the mark of civilized adventure and the open frontiers. When roads disappear, drivers rely on stout frames, ground clearance and that legendary seven-slot grille. The Selec-Terrain dial allows you to select a level of grip which, in mud, sand or fresh snow, is quicker than a heartbeat. Its interior comes with voice-controlled tactile switches and in-car updates that update when you are asleep. Even dirty fingers can be applied on touchscreens due to rough finishes. The Jeep events of Moab to Maine testify to the fact that the rigs ignite the community as much as they overcome ruts. The long drives are also comfortable since the Jeep seats are balanced between firmness and bouncing. The Radiator Cap is small, but clamps around 16 psi; the coolant liquid remains liquid despite an increase in block temperatures caused by punishing climbs or crawling. Should pressure exceed that which makes it vent vapor to the reservoir, hoses and gaskets are saved. Replace an old Radiator Cap and you can frequently cure hot running motors faster than any fan upgrade. As the engine cools, its spring, seal and vacuum valve force the cooling fluid back and prevent air bubbles. The Radiator Cap has consistent ratings and thus, drivers pick up alternatives without reading decoding charts. That universal fit removes the trail crew sifting through the hot engine bays. Disregard a leaking Radiator Cap and get deformed heads, slow engine power and walking home.

Jeep Radiator Cap Parts and Q&A

Radiator Cap
4596198
Q: How to Inspect and Replace a Radiator Cap on Jeep Wrangler?
A:
If you hold the radiator cap upright and make sure the lower vent valve is opening, you can safely check it. If a swollen rubber gasket keeps the vent valve from opening, you should change the cap. After that, place the cap face down with the opening pointing at your eyes; if there is light between the valve and the gasket, you should replace it. It helps to replace the damaged cap with one that lacks a spring to keep the vent closed. The new radiator cap ought to fit the overflow system, have a sealed diaphragm spring and a rubber gasket that seals at the top of the radiator filler neck. The cap you use will control how the coolant gets back to the radiator.
Serpentine Belt
55111074AC
Q: Is Your Radiator Cap in Need of Replacement? How to Inspect and Decide on Jeep Patriot?
A:
Stand the radiator cap upright; if the vent valve at the bottom opens, change it out. Should the rubber seal 5 swell and block the valve, you should replace the follow-up cap as well. Following this, turn the cleaned cap upside down and look for any light between vent valve 6 and rubber seal 5; if light appears, change the cap. A special replacement cap should always be used in a full pressure coolant system to direct the coolant back to the radiator.