I've had a slight coolant leak for probably a couple months now, and I haven't been able to figure out where from. I've only had to add a few cups of water about once every week or two, so it's very slight. I had a shop pressure test the cooling system real fast and said it looks like it's coming from the timing chain cover from behind the water pump. The shop said it'd take 8+ hours and around $650 for them to do the work, including the gaskets & timing chain. Has anyone had any issues like this before? Should I do the timing chain as well? Degree of difficulty in doing the work myself? Worst case scenario if this escalates and are there any signs of said screnarios? I've got about 89k on the engine. TIA for any help!