So, I had a go at cleaning my EGR Valve but there were two nuts (one in particular) that I wasn't too sure about how to get to. There's also the concern that I'm dealing with cast stuff here and there's always a chance that something could shear. Ideally I'd be working with it all nice and hot after a drive but if I'm shoving my hands in tight spaces then it would have to be a cooler engine (more risk of shearing). Here's a photo with some annotations. There is literally no access to the underside nut nearest the bulkhead (out of view and marked with one of the red arrows) from the top. Even from the bottom it looks unlikely, possibly a long extension bar or combination of such. Has anyone ever done the EGR valve on the CR-V or have any ideas/knowledge on this? I'd like to avoid stripping out other components.