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Toyota Supra (MK4) Radiator & Cooling FAQ's

Please read our FAQs page to find out more.

What cooling upgrades address MK4 heat‑soak on hot days?

An aluminum radiator, improved shrouds/fans, and silicone hoses increase heat rejection. Proper ducting ensures the core sees cool ambient air.

Is an oil cooler recommended for a track‑driven MK4?

Yes—stabilizing oil temperature and pressure preserves film strength under sustained load, especially on high‑power cars.

Any tips for bleeding the MK4 cooling system?

Follow the correct procedure, elevate the nose, and verify fan operation. Air pockets cause fluctuating temps and localized hot spots.