Just going over fluid levels on my 750 and realized there was no coolant in the overflow (the radiator was full though). So I figured i'd flush it. Let it run with distilled water and it started leaking out the cap. I pulled the cap off and watched how it would overflow (onto the ground) and then burp and the level would go down, then 5 seconds later, the level would go back up, overflow on ground, burp, back down, etc.
In order to get the cap off, I had to use 2 flat heads to push it up. I inspected the cap and it looks totally fine. It's just a PITA to get off. I would think it's the cap, but the gaskets look fine.
Any help?
PS it has not overheated, nor have i had those problems.