So did some driving today. I used the Olbs cap. Generally when I drive with that cap- Mainly in town- I loose some coolant from evaporation. Not a lot but some(like from 1 inch above tubes to down to tubes)
So With the tank hooked up- Mounted below the ranco valve on the firewall- hose from Rad running along inner/outer fender seam to bottom of tank- then overflow drain line running straight down to ground between chassis and starter.
So with the driving I noticed that the tank got a little warm while system was hot(regular running temp)
The coolant level at the the beginning and end of day was the same.
In the coming days I will have a 250-300 mile highway day and will let you know how it does there. that is generally where I see the highest loss of coolant(extended highway driving(45-50mph, and highway, not interstate)
