I bought a duralast radiator cap from autozone and replaced it, but was still a little low on coolant. It looks to me like the rubber flap on the bottom of the cap was covering the port that allows pressure to relieve itself into the reservoir, meaning the pressure stayed in the system instead, breaking the plastic of the radiator.
Reviews of Duralast radiator cap
3 votes
1 review
What we know about Duralast radiator cap
The brand is registered in USA. Official website: https://www.duralastparts.com/.
In March 2026, PartReview does not yet have a formed opinion of Duralast radiator cap. You can help by adding a review for Duralast radiator cap.
Currently there are 1 review and 3 votes. Average rating — 1 out of 5. Vote balance: 0 up, 3 down.
Users also evaluated the qualities of Duralast radiator cap:
- Seal - no coolant weeping around the cap neck - rated negatively. 1 point out of 5.
- Overheat control - engine temp remains normal on hot days - rated negatively. 1 point out of 5.
- Hose feel - upper hose feels firm but not rock hard when hot - no rating yet
Radiator cap Duralast in car-specific ratings
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