What is your favorite thread seal paste brand?Yeah, they are crappy fittings that weren’t very tight together and though it being a drain, that what I did was good but clearly not.
Will take it off once it cools and use my thread seal paste with thread lock. Nothing gets through that. I’ve used it on my tv pressure sensor setup and everything else important and wish I’d used that on this but will now.
Btw, ntqsd and I were suggesting similar approaches but I was confused by your reply. Looking at the pics, I thought it was mounted square to floorboard?
Is the fan a pusher or puller?
I’d guess there’s a boundary layer close to floorboard that you want to work around. A wind speed sensor would tell you if at speed the airflow was getting interrupted. I was using one to check how my winch affected radiator airflow at speed.











