4WDGL

Hello all, this is my first post here. I bought a 2003 Forester last July. It just turned 6,000 miles and I've noticed a rather loud engine ping. I've tried switching gas brands as well as octane (one tankful of 89 instead of 87) and the ping continues. I've also noticed a strong odor of coolant while sitting at a light and after shutdown. There is no coolant on the ground and the level hasn't gone down much, but I'm wondering if either one or both of these are something to be concerned with or maybe there are somehow connected. Anyone else had these problems? I'm starting to think I should've fixed up my 84 GL wagon instead:rolleyes: