Toyota Camry

Hello, I have a 2.2L 1996 Camry LE, 225,000 miles. I have an oil leak that I have traced to be coming from possibly behind the timing chain. There appears to be a channel for oil or something to flow down from behind the timing chain down toward the oil pan. At first I thought the problem was the oil pan, until I changed the gasket and still had a leak. That's when I tracked it to behind the timing cover. What would be going out to cause the leak? I would appreciate any help. Thanks
November 18, 2007.

Could be the camshaft oil seal or the front seal

Nov 19, 2007.