How to Inspect and Replace a Radiator Cap on 2008 Jeep Wrangler?

Inspect the radiator cap by checking the vent valve on the bottom of the cap, if it doesn't open because of a swollen gasket, replace the cap. Make sure the replacement cap is made for a coolant reserve system which has a sealed diaphragm spring and rubber gasket that will allow for proper coolant return.

OEM 2008 Jeep Wrangler Radiator Cap

Cooling Radiator Cap

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2008 Jeep Wrangler 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
- Item Weight: 0.60 Pounds
- Item Dimensions: 9.5 x 6.1 x 1.0 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 4596198
- Warranty: This genuine part is guaranteed by Mopar's factory warranty.
More Info
Fits the following 2008 Jeep Wrangler Submodels:
- 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

2008 Jeep Wrangler Radiator Cap Parts and Q&A

Q: How to Inspect and Replace a Radiator Cap on 2008 Jeep Wrangler?
A: Inspect the radiator cap by checking the vent valve on the bottom of the cap, if it doesn't open because of a swollen gasket, replace the cap. Make sure the replacement cap is made for a coolant reserve system which has a sealed diaphragm spring and rubber gasket that will allow for proper coolant return.