How to say “He started the engine just to hear it, switched it off again and stood there grinning.” in Japanese

In Japanese

あいつ、音(おと)が聞(き)きたいだけでエンジンをかけて、すぐ切(き)って、ひとりでニヤニヤしてた。

Aitsu, oto ga kikitai dake de enjin o kakete, sugu kitte, hitori de niyaniya shiteta.