I have a 2002 Dodge Grand Caravan 3.8 L. It has a coolant lead from what looks like the back of the water pump. It looks like there is just a rubber cap with a spring clamp on the back of the water pump. It looks to be about 5/8's in size. I can only see from underneath but feeling around it feels like that's all there is. Does that sound right? Can I just replace that cap?
Thanks,

Greg