Timing cover doesn’t normally leak.
Balancer seal can leak but normally the oil goes down on the oil pan.
There are two bolt holes on the front of the block right by the fuel pump. Oil can be blown out of one of them due to excessive crankcase pressure.
That oil will burn on your exhaust.
Look for those bolts first. If none are present there put two very short bolts in.
If you can take a pic of that area.
There’s some info and a pic in here for you.
http://www.rowand.net/shop/tech/Myst...evyOilLeak.htm