The cap which came on the Koyorad is probably a two way cap. If so it needs to be replaced with a Subaru one way cap.
Cons: wrong cap type, needs replacement
Vehicle:
Subaru
Reviews of KOYORAD radiator cap
PR Score
?
Shows the percentage of positive votes. Learn more about the score in the help
3 votes
Average rating
?
The average rating is calculated based only on review ratings, excluding votes
1 review
Description
Share on social networks:
Other radiator cap
Popular spare parts KOYORAD
Voted AGAINST engine oil RAVENOL on the rating page
The brake pads OEM Alfa Romeo got the first review!
The brake caliper OEM BMW got the first review!
The brake pads OEM Infiniti got the first review!
For wiper blades PIAA already 100 reviews.
For battery Energizer already 25 reviews.
In the rating best water pump already 12 brands participate!
In the rating best timing belt already 13 brands participate!
In the rating best head gasket already 3 brands participate!
In the auto rating oil filter for Volkswagen Passat already 5 brands participate!
In the auto rating brake pads for Mazda 5 already 10 brands participate!
In the auto rating tires for Subaru Outback already 50 brands participate!
For cabin filter Fram already 25 reviews.
Voted AGAINST engine oil RED LINE on the rating page
Voted AGAINST engine oil PENNZOIL on the rating page
What we know about KOYORAD radiator cap
The brand is registered in Japan. Official website: http://www.koyorad.co.jp/.
In March 2026, PartReview does not yet have a formed opinion of KOYORAD radiator cap. You can help by adding a review for KOYORAD 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 KOYORAD radiator cap:
- Seal - no coolant weeping around the cap neck - no rating yet
- 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 KOYORAD in car-specific ratings
Unfortunately, there are no car-specific ratings for this part yet. You can help by adding a review and specifying your car.