Experienced a full separation of the top (and possibly bottom) plastic from the aluminum portion - would leak about as fast as I could pour it in. Replaced with Koyorad A2807 from RockAuto.com for $104 plus tax and shipping. Nominal time to repair for a non-mechanic is probably 4-to-6 hours - call it a day project.

Pros: fixed severe leak, cost-effective

Vehicle: Nissan

Mileage: 531082 km

Part number: A2807

KOYORAD › Engine radiator

Oh_Ya_No 9 Oct 2025, 16:25

Rating 5.0

Overheating:

got a Koyorad off Rock Auto for around $100 and slapped it in there. Runs like a champ. It is a pretty easy job if you're mechanically inclined.

Pros: runs like a champ, easy job

Vehicle: Nissan

KOYORAD › Engine radiator

rearwindowpup 3 Oct 2025, 17:28

Rating 5.0

Overheating:

I've had a Koyorad in my 97 for 5 years now and it's been great.

Pros: great performance, 5 years durability

Vehicle: Toyota 4runner

KOYORAD › Engine radiator

NoabPK 21 Sep 2025, 22:41

Rating 4.0

i recently put a koyorad in mine as well, the hoses at the bottom took me forever to work with but it was worth it

Pros: worth the effort

Cons: difficult hose installation

KOYORAD › Engine radiator

khufu42 13 Sep 2025, 02:07

Rating 5.0

Overheating:

I replaced it with a OEM style koyorad I found for $130 and corrected the radiator caps and my temps have been perfect all summer. It is a bitch to burp the coolant so I recommend buying the spill-free funnel.

Pros: perfect temperatures

Vehicle: Subaru Forester

KOYORAD › Engine radiator

dlaguerta 19 Aug 2025, 03:50

Rating 4.5

Overheating:

The Koyorad full aluminum radiator is the one to have. Paired to your Hayden 698 since it doesn’t have a section to cool the trans fluid, however definitely worth it for durability as the next alternative over OEM replacement rad.

Pros: excellent durability

Cons: no integrated trans cooler

Vehicle: Toyota 4runner

KOYORAD › Engine radiator

The-Cheanky-One 26 Apr 2025, 02:38

Rating 5.0

Overheating:

I bought a Koyorad radiator for my 2003 Toyota Sequoia and worked out perfect!

Pros: worked out perfect

Vehicle: Toyota Sequoia

KOYORAD › Engine radiator

ButterscotchWitty870 26 Apr 2025, 01:18

Rating 4.5

I refused to install anything but a koyorad

Pros: high quality

Vehicle: Toyota Avalon

KOYORAD › Engine radiator

apexChaser71 21 Mar 2025, 00:57

Rating 5.0

Overheating:

My all aluminum Koyorad radiator is a far superior unit than the factory original.

Pros: far superior to OEM

KOYORAD › Engine radiator

PatrickGSR94 21 Feb 2025, 21:29

Rating 5.0

Overheating:

I run the Koyorad 38mm radiator on my NB, with just regular Prestone green concentrate and distilled water 50/50, and OEM Mazda cap and thermostat. Coolant temps stay in the 190's at all times. It very rarely gets above 200 except on the hottest summer days, usually when sitting in traffic.

Pros: stable coolant temperatures, rarely overheats

Vehicle: Mazda