I installed the Mishimoto Degas Bottle

VIDEO: I install the Mishimoto Degas Bottle

So, so good. I haven't had any coolant blowouts, the temperature hasn't passed 192 degrees and the oil temp reached 202 degrees, Tranny temp his 161. I drove 50 miles the first test drive and had no blowouts of coolant. I never had to turn on the engine fan with the blue wire switch either. The second test drive, a couple minutes of which I share at the end of this video had the same result. I drove 75 miles this time and tried to drive up even steeper longer hills and the engine never exceeded 192 degrees, oil 202 degrees. Again, I never had to turn on the engine fan. Before this installation, I would have had to turn the fan on to maintain temperature. The Mishimoto measured smaller internal volume than the OEM degas bottle. 18 cups water versus 18.5 cups water. A small difference however it could have been enough to matter and may still be except for other things I chose to do during the installation. I eliminated the Wye pipe under the degas bottle the 3/4" heater hose return connected into. I installed a 1" SS wye closer to the water pump intake and farther from the degas bottom connection. In my truck, the filter and heater split from the 3/4" tube by the alternator. Half goes through the alternator heater core, gets cooled, then returns to connect to the same 1" hose as the degas bottle. The other half of the circuit goes to the coolant filter, then passes a pressure gauge, then goes front of the radiator and behind the AC Condenser where it goes through a radiator same as the half going through the heater core. The hose then continues around to the left passt the battery to under the master cylinder where it takes a 90 degree turn and connects in the side of a Tee with the heater return and into a 1" hose that connects to the wye with the degas bottle and into the water pump completing the circuit. I believe upsizing the hose and fittings and moving the connections closer to the water pump intake, I lowered pressure and improved flow through the system eliminating possible back pressure that may have been the problem. My supposition can be armchaired all anyone wants, the fact is, the truck now operates without fear of having a coolant purge and I haven't had to engage the main engine fan lockup to keep it cool and prevent over heating conditions. Sure, I have a few extras on for cooling and they work. If you are one of the many others with cooling issues, this is a great resource for stimulating your own ideas.