The Koyorad JR2041J radiator steps into the engine bay of a Toyota Hilux LN Series with a 3.0L diesel and takes over cooling duties across a 450 mm high core. The 525 mm wide face lines up with the shroud so the fan pulls air through every fin, handy when you are grinding along in low range for hours. A 36 mm thick core keeps coolant volume up so the gauge stays steady on hot days.

A pair of 35 mm inlet and outlet necks match standard Hilux hoses, so the setup bolts in clean without hunting for odd sizes. The internal transmission cooler is built into the same 450 x 525 mm package, so you keep gearbox temps in check while towing. The sizing is made to work with the original front support, giving enough clearance for bash plates and bars while still moving plenty of air.

• Suits Toyota Hilux LN Series 3.0L diesel from 11/1997-on
• Core height measures 450 mm for strong frontal coverage
• Core width measures 525 mm to suit factory shroud
• Core thickness is 36 mm for stable heat capacity
• Inlet pipe diameter is 35 mm for matching hose size
• Outlet pipe diameter is 35 mm for straightforward fitment
• Includes integrated transmission cooler inside tank
• Compatible with manual transmission and air-conditioned models
• Direct-style replacement radiator from Koyorad brand
• Ideal for touring, towing and heavy load conditions

Q: Does this radiator fit all Toyota Hilux LN models with 3.0L diesel engines from 11/1997-on?

It suits LN Series 3.0L diesel models from 11/1997-on with manual transmission and air conditioning. Always cross-check the core size of 450 x 525 x 36 mm against your original unit. Some Hilux models outside this LN range use different mounting points and hose locations. If your ute has had an engine or front-end conversion, confirm dimensions with a mechanic.

Q: Is the transmission cooler built into this Koyorad radiator?

Yes, this radiator includes an internal transmission cooler. The cooler sits inside the tank so coolant helps manage transmission fluid temperature. This arrangement keeps plumbing tidy in the engine bay. Always reconnect transmission lines carefully and top up fluid to the required level after installation.

Q: What hose size does this radiator use for the top and bottom connections?

Both the inlet and outlet necks use 35 mm diameters. This matches the typical hose size used on LN Series 3.0L diesel Hilux models. Standard 35 mm hoses and clamps typically seat well on these necks. Always inspect hoses for age or cracking when swapping the radiator and replace them if they look tired.

Q: Should I replace the coolant when installing this radiator?

Yes, fresh coolant should be used when fitting a new radiator. Old coolant can carry contaminants that may affect the new core. A full drain and refill helps maintain proper corrosion protection and temperature control. Follow the Hilux service manual for the correct coolant type and mix ratio for your engine.

Suited to Toyota Hilux LN Series models built from 11/1997-on with 3.0L diesel engines. Fits manual transmission vehicles with air conditioning. Confirm core height 450 mm, width 525 mm and thickness 36 mm with the original radiator before installation. Professional installation is recommended and new coolant should be used when fitting the radiator.