Ecomike: I saw your "fix" of putting a brass nipple inside the plastic bottom nipple of the
Renix tank. How does this prevent cracking of the tank? My current tank is cracking on the top side. I never had a leak at the nipple, always some where else. Thanks!
The Volvo bottle cap is the key. It is not as tall and does not hit the hood. The current bottle caps that come with the bottles are too tall, the hood crushes them and the bottle, and stresses the bottle cracking them.
Also the bottom nipple needs a metal insert like the side nipple comes with, or else they deform under clamp pressure as the heat cycles, and then they leak there, loosing pressure and raising the coolant temperature.
I have two renix rigs with 5 year old China junk Renix bottles that are leak and crack free, both have the brass nipple inside the bottom of the tube added, and the volvo cap, and the other heating issues are fixed on both.
See Mu-A-Dib's photos of the brass nipple, inside the plastic bottom nipple, Mod. It works great. I have two now that have lasted about 5 years on DDs, in 105 F heat waves in humid Houston with AC on MAX!!
I have yet to have a Volvo cap leak or come loose!!! They are not as tall, do not hit the hood (which crushes the bottle using the stock cap), and they have a superior shape that keeps them from swelling.
