This Koyorad radiator uses a 545 mm high and 480 mm wide core to keep Hino and Toyota Dyna motors under control when the gauge starts creeping on long hills. A core thickness of 48 mm gives enough coolant volume for loaded work utes and small trucks doing 2007-on Durto 300 runs. Matching 42 mm inlet and outlet necks line up with factory hoses so you can swap it in and get out there again.

The 48 mm thick core spreads heat across the full 545 mm by 480 mm surface so airflow from the fan does the hard work on slow job sites. An 8 mm breather port ties straight into standard overflow setups, keeping the cooling system stable on hot days. An integrated transmission cooler across the 480 mm width helps autos tackle city stop‑start work and country climbs without cooking the oil.

• Suits Hino and Toyota Dyna applications listed
• Core height of 545 mm for strong cooling area
• Core width of 480 mm to match factory shroud
• Core thickness of 48 mm for added coolant volume
• 42 mm inlet diameter for upper hose connection
• 42 mm outlet diameter for lower hose connection
• 8 mm breather port for overflow plumbing
• Integrated transmission cooler included in tank
• Direct-style replacement for No4 type radiators
• Manufactured by Koyorad for light commercial use

Q: Does this radiator include an integrated transmission cooler?

Yes, this radiator includes an integrated transmission cooler. The cooler is built into the main core area, using the same 545 mm height and 480 mm width for heat rejection. This helps keep automatic transmission fluid temperatures in check under towing or stop‑start conditions. It also means you can connect the transmission lines without adding an external cooler if the vehicle is originally equipped this way.

Q: What hose diameters does this Koyorad radiator suit?

This radiator suits hose connections with a 42 mm internal diameter. Both the inlet and outlet necks are specified at 42 mm, so they align with the original equipment hoses on compatible Hino and Toyota Dyna models. Matching diameters help reduce the chance of leaks. They also remove the need for adapters or reducers in the cooling system.

Q: How can I confirm this core will fit my truck?

You can confirm fitment by comparing key dimensions and vehicle details. Measure your existing radiator core height at 545 mm, width at 480 mm, and thickness near 48 mm. Check that your hoses use 42 mm connections and that your vehicle matches the Hino or Toyota Dyna applications listed. If those match, this unit is a strong candidate for direct replacement.

Q: Is this radiator suitable for use in hot Australian conditions?

This radiator is specified with a 48 mm thick core and a face size of 545 mm by 480 mm, which supports good heat rejection. The integrated transmission cooler also helps manage drivetrain temperatures when ambient temperatures are high. Using correct coolant mix and maintaining clean airflow across the fins further improves performance. Many drivers choose this style of core for regular work in Australian heat.

Suits Hino applications and Toyota Dyna models from 2006-on and Ctn Durto 300 models from 2007-on where No4 radiator type is specified. Fitment should be confirmed against the original core height of 545 mm and width of 480 mm plus 42 mm hose diameters before installation. Professional installation is recommended for correct integration with the existing transmission cooler circuit.