Help with Rumble

Rumble is a free champ this week. I had only seen him played once ever, so I decided to check him out. I like tank bruisers, and he is kind of in that category, so I started playing him. He seems really op. I somehow managed to 1v4 and win, I don't know how though, because they were winning, so I want to start playing him. I can manage the heat, cs pretty well, but I always die a lot early game based off of the 2 real games I've played with him. I need a bit of help so I can destroy late game and win. If you could give me builds, or friend me so we can play custom/real games, that would be great. Thanks!