问:冷却剂似乎消失了

我的车跑好。任何奇怪的声音和气味。我最近改变了水泵皮带轮、传动皮带和张紧装置。将oveeheat很快我甚至不能开车。我改变这些部分后用冷却剂和它跑好了几天然后再过热。但现在它会变热,有时它冷却之前我可以靠边。我检查了,没有冷却。我离开了帽,开始把冷却剂,它是吸下来。我能感觉到的冷却液散热器软管上部和上管变热。散热器风扇来吧。 The radiator cap is clean and has the rubber and spring still work fine. The radiator isn't blocked. It doesn't show its leaking coolant on the ground. I've heard that these cars do go through coolant. But a gallon in 2 days seems a bit much. So where could the coolant be going?

我的车有153735英里。
我的车有一个自动变速器。