No spikes in temp, all seems fine. No codes. Had system pressure tested, all ok. Checked rad cap, was marginal, so replaced it. Still smelling coolant when car is hot. Seems to be stronger inside the car when running a/c. For example, did highway run today for about 1 hour. ran a/c most of the time. Stopped at bank, went inside for 10 minutes. Come out, get strong whiff of coolant when I get into the car. If I pop the hood and sniff around, I smell a slight smell to the left of the battery near the drivers side clsoe to the engine cover. What should I check next?