I have a leak in my 4G in either the heater matrix or the hoses that go to the matrix. I know this as I have pools of water coloured with antifreeze, dribble marks down the inside of my firewall, and every once and while I get a wiff of coolant (mmmm curry

Loop off coolant hoses either at the rear of the block or inside the fire wall and use one an in-line fan http://www.ebay.co.uk/itm/In-Line-Bilge ... 3cc7af3ab5 to blow only cool air take from an outside feed.
Loop off coolant hoses either at the rear of the block or inside the fire wall and use an electric heater like this http://www.cbsonline.co.uk/product/Elec ... ater_DEMST and run some piping to the vents at the window.
Keep the coolant hoses and use a micro matrix and fan http://www.t7design.co.uk/index.php?mai ... 9b5f6bb595 Only blows hot air. I suppose I could rig up something to swap over to cold air.
Any thoughts?