Coolant Leaking problems of the 2008 Honda CR-V

I was driving my car on the highway when all the lights on the dashboard turned on (check engine, check batterry, check tires etc). So I pulled over to the side of the highway and turned off the car and tried turning it back on and it would not turn on. You could hear the engine cranking but it would not turn on. After several attempts I called a tow truck and had my car towed to the rick case Honda dealer where my car had recently been serviced. After having my car checked for a whole day I was told that my engine had blown and I needed a new engine. The Honda svc advisor told me the car had overheated and that's why the engine blew. I explained to him the car never overheated bc the temperature gauge never went past the normal temperature. When I went to pick up my car I spoke to the shop foreman and he told me a metal pipe that holds the coolant had cracked and all the coolant leaked out and that's what caused the engine to overheat and blow. He couldn't tell me what caused the metal pipe to crack. After taking my car to have the engine replaced I was told that the metal pipe that cracked was worn out at a specific spot and that's what caused the metal pipe to crack. I tried calling the Honda dealer to explain this bc not too long before my car had some hoses replaced in the same area where the metal pipe was located but the dealer and corporate Honda say I have no proof that the work they did prior was what caused the friction to the metal pipe leading it to crack. I explained it was odd that the rest of the metal pipe was in good condition except that one spot where the crack was but they refused to listen. Had I not pulled over when the lights on the dashboard turned on and I kept driving on the hwy who knows what could have happened to me or others on the hwy. I feel this is a serious safety issue but Honda states not enough pple have complained about this.