I have a 2000 Chrysler T&C AWD that makes a rattling sound when I accelerate. At idle the engine is quiet but once I step on the gas, it starts rattling. It sounds like some of the rod knock videos I've seen on youtube but unlike those on the videos, mine only gets noisy when I step on the gas. I've also noticed that after topping up the coolent, it's quieted down just a bit but noticed that it's dripping coolent under the car. BUT before all this happened, I took my van in to the dealership because there was a noticable ticking coming from the engine. They took the engine apart and was told that it was just noisy lifters and that it would cost $1500. to replace. I called another dealership and was told that getting an oil changed might reduce the noise. So I had that done but that didn't help...so after about a month, coming off the freeway, that's when the rattling started and since then I haven't driven the van in fear of seizing up the engine. It's been about 3 weeks now. Any idea what could be going on or please point me in the right direction.