I have an 04 Range Rover. I recently had to replace my coolant reservoir tank again for the 5th time. What could be causing the tank to crack/burst? Right now it’s leaking from the seam where the two halves of the tank meet. I’m really frustrated because every 4-5 months I have to replace it. I keep replacing it with a behr oem tank. The coolant system on my Range Rover is rebuilt and running great. There isn’t to much pressure in the system. I had a Land Rover shop verify that. They did all the work on replacing the coolant system components. But the tank keeps cracking/bursting and leaking. I even have a lower pressure cap on the tank to help try and prevent what just happened. It’s been doing that since before I had the shop fix everything wrong with my rover. Any advice fellas? Is there a metal tank option out there I don’t know about?