I have had a strange issue with coolant leaking/burping from the overflow, and steam on the under side of the trunk. Replace the coolant cap again thinking it was the problem, but could still see there were signs of coolant leaking from somewhere around the bleeder valve. My coolant tank has been replaced at some point, but be aware that the bleeder valves do leak, and can be easily replaced first vs. getting a new tank. My bleeder valve had a bunch of the little black plastic tabs broken off that looks to center the bleeder valve, which appears was causing the problem once hot. It is an easy replacement, you just have to pay attention to the correct orientation so the screw holes line up, o-rings in the correct place, and dont tighten too much since they are in plastic.
Linear Mode
