I just asked this question but I forgot to mention one thing

I just received the answer the answer to the problem I am having with my jeep. He said if there is no coolent leak to try something, but it is leaking antifreeze a lot faster than I can put it in. Here is my original post.

Okay so I had a friend change my thermostats and when he was finished my jeep was leaking antifreeze. He then told me he didn't know if he had put it in there right or if he had tightened the radiator house all the way. He then went to try and fix it again and broke a bolt where the thermostats would go. He told me it wouldn't be a problem and he would fix it the next day. I drove it to work the following day and the temperature gage went all the way to high. When I went to leave work my jeep started making this horrible knocking noise and I could feel it in the gas pedal. Then once again my temperature gage went all the way up. I pulled over and had it towed to my home. Any idea what is wrong with it please help! Thank you!