Coolant Hose Inner Diameter?

Casey Pontes

Active member
Mar 24, 2019
I'm looking to remove the rear climate control unit, as well as the hoses leading to it, from my 2007 LR3. In order to do so, I'm planning to replace the plastic 3-way joints (at the rear of the engine bay; passenger side; next to the firewall) with 2-way male/male barbed fittings. Does anyone know the internal diameter of the coolant hoses at these locations? I need to purchase the appropriately sized barbs.

Also, does anyone have a better solution than utilizing 2-way male/male barbed fittings, or is this plan sufficient?heater hose.jpg