The Jayrad radiator JR2816J drops into Toyota Coaster HZB50, HDB and HZB buses from 1997 to 2004, with a core size of 560 mm high by 595 mm wide to match factory dimensions. The 61 mm thick four row core keeps coolant moving when the bus sits loaded with gear and passengers. The built in transmission cooler suits manual setups that still need consistent thermal control across long highway stretches and slow depot yards. This radiator runs a four row layout to spread heat across more tube surface than a slimmer core, which helps when temps push past 35°C on inland runs. The 38 mm inlet and 42 mm outlet match standard hose sizes, so the existing cooling setup stays balanced. The unit pairs well with fresh coolant and clean shrouds, giving a smart buy for operators who want gear that handles daily work without fuss.

• Suits Toyota Coaster HZB50 HDB HZB buses built 1997–2004
• Replacement radiator matched to manual transmission applications
• Core height of 560 mm for factory-style coverage
• Core width of 595 mm to align with original shrouds
• 61 mm thick four row core for improved heat rejection
• 38 mm inlet and 42 mm outlet to suit standard hoses
• Integrated transmission cooler for stable drivetrain temperatures
• Jayrad branded radiator for touring and commercial use
• Suitable for 4x4 and touring performance cooling upgrades
• Ideal for fleet maintenance where correct dimensions matter

Q: Does this radiator include a built-in transmission cooler?

Yes, this radiator includes a transmission cooler. The unit is specified with a trans cooler section integrated into the tank. That means coolant and transmission fluid circuits remain separate but share the same cooling core. It is important to reconnect the transmission lines carefully and use the correct fluid. A pressure test after install helps confirm everything is sealed.

Q: What Toyota Coaster models does this radiator fit?

It suits HZB50, HDB and HZB Coaster buses. The fitment covers Toyota Coaster buses built between 1997 and 2004 with these chassis codes. Matching the core dimensions of 560 mm high and 595 mm wide helps confirm compatibility. You should also check hose diameters of 38 mm inlet and 42 mm outlet. When in doubt compare against the existing radiator before ordering.

Q: Is this radiator suitable for manual transmissions only?

This listing is for manual transmission setups. The description specifies manual applications for the HZB50, HDB and HZB Coaster range. The built in cooler still manages transmission fluid flow where required. Automatic versions may use different fittings or mounting points. Always cross check the part number JR2816J against your VIN and current radiator style.

Q: Do I need to change hoses when fitting this radiator?

Hoses should be inspected and replaced if worn. The inlet diameter is 38 mm and the outlet is 42 mm so standard hoses that match these sizes will fit. If the old hoses show cracking soft spots or swelling they should be replaced during the same job. Fresh clamps and coolant will help the new core last longer and reduce the risk of leaks on the road.

• Vehicle compatibility: Toyota Coaster Bus HZB50 HDB HZB
• Model years: 1997–2004
• Transmission type: Manual
• Application: Replacement radiator with auto transmission cooler
• Confirm core dimensions: 560 mm (H) x 595 mm (W) x 61 mm (4 row) against existing unit
• Professional installation recommended for correct coolant fill and bleeding
• Reuse or replace caps hoses and clamps as required during installation