I purchased a '94 Accord EX fairly recently that seems to be having an overheating issue. I'm having to add coolant about once a week. I don't see where it's leaking out much, if at all but the temp gauge rises towards the H and I check my coolant level and sure enough it's low. Where could the coolant be going? What sorts of issues should I take into consideration? I haven't seen any coolant from the exhaust or leaks around the engine so I don't think it's the head gasket...