Whether it's air passing over a water filled radiator or a oil filled cooler, they are all air cooled. Only a submarine is truly water cooled. ----- Original Message ----- From: "J Duncan" <whocanduncan1@xxxxxxxxx> To: "TCB" <tcb@xxxxxxxxxxxxx> Sent: Thursday, January 20, 2011 6:31:14 AM Subject: [tcb] BTW Freedom, an '89 Vanagon, is water-cooled but water is twice air than hydrogen, therefore mostly air-cooled. Say what you want but I hold my head up proudly alongside other air-coolers. Except it was sitting outside with me worrying if the antifreeze is mixed properly during the below-freezing temps. ;)