Engine repair question about 2008 Town and Country 3.8L

Okay, these are all good comments. I thank you all. I have one more question. If it is the intake manifold gasket, and not the head gasket, will a compression test show all six cylinders good, or will there still be one (or more) off? I apologize, but I’m only a shade-tree mechanic and I have never had to deal with this before. Thank you all again!
I meant to comment on the compression test results but got lost in the conversation. As mentioned, the compression test only tests the individual cylinders. However, as mentioned earlier, the compression test on the "bad" cylinder could be low, but I have also seen the bad cylinder read too high, because of the presence of coolant in the cylinder. Coolant cannot be compressed and if there is a small amount, it can make a big difference in the compression test results. So look for one that's decidedly "different" but not necessarily low. It could go either way.