This is what I've done once to make a mondeo driveable again:
Detach the actual hot exhaust gas pipe from the valve. Between the pipe and the valve you'll find a metal gasket. Get yourself an old bean can and make another gasket from that, same shape but without the hole in the middle. Put everything back together and the car should run fine again.
Worked fine for 300 miles till I got the reconditioned EGR valve.
Last edited by PeterRST; 21-02-2009 at 10:26 AM.