Losing coolant

[Leroy Eckert]

Thanks, I thought that is what would happen. I have been reading the DD service manual, several sections regarding cooling and PM. There are two references to the pressure cap, a 7psi and a 9psi. No recommendation. To pressure test the radiator it says to run the pressure up to 15-20psi, do not exceed 20 psi and look for leaks and or leak down. My 13psi cap was on the coach when I purchased it and all has been well. I was wondering about the seals on the water cooled piston sleeves and how water pressure would affect them. With a 20 psi test procedure a 13psi cap should be OK. But now I wonder if I should change to 9psi. On the tank fluid level, the DD manual says to fill the tank to 2" below the neck or the manufacturers recommendation. In our case, BB says above the site glass. Yes I changed my alarnstat and mine runs a bit cooler than yours. Leroy Eckert 1990 WB-40 Smoke N Mirrors Dahlonega, GA --- On Fri, 10/24/08, Don Bradner wrote: From: Don Bradner Subject: Re: [WanderlodgeForum] Re: Losing coolant To: WanderlodgeForum@yahoogroups.com Date: Friday, October 24, 2008, 10:56 PM It would compress until it reached the pressure setting of the cap, after which air would escape from the cap. Fluid would only escape when it is hot enough to expand to fill the entire tank, at which point it would escape sufficiently to maintain the same pressure. Expansion is temperature related. Mine gets hotter than yours, because you've replaced your alarmstat for a lower-temp one, right? Mine peaks normally at 197 unless the fan is overridden and constantly on. My problem with assuming that's the issue is that I've pushed 200 on hills in the past, including on this trip, without losing coolant. Don Bradner 90 PT40 "Blue Thunder" My location: http://www.bbirdmaps. com/user2. cfm?user= 1 On 10/24/2008 at 7:27 PM Leroy Eckert wrote: >Don, now that the level of the fluid is corrected, what happens to that >air space in the tank. Does it compress???? when fluid level rises?? Mine >has never blown out a drop of fluid. >Leroy Eckert >1990 WB-40 Smoke N Mirrors >Dahlonega, GA >Royale Conversion