Engine repair question about 2008 Town and Country 3.8L

65LoveAffair said
Okay, at the risk of triggering those who think I don’t consider this a priority, I have some progress to report. I did the rubber glove test on the van today. Well, I actually did it three times because I realized I was doing it wrong the first two times. Different wrong each time, but both still wrong.

Test 1: Glove inflated, but overflow hose still attached.
View attachment 1716202778

Test 2: Overflow hose disconnected, and glove past the nipple. Glove inflated, coolant in glove.
View attachment 1716202779

Test 3: Overflow attached but properly clamped off. Ran the van for the same amount of time as other tests, and there was no indication of inflation at all.
View attachment 1716202780

So, if what I have read here is correct, the head gaskets are okay and my issue most likely is the intake manifold gasket. Is this a safe assumption?

To check.for bad head gaskets, put a paper clip under the radcap vacuum break valve and reinstall the rad cap. Warm the engine until the engine is well warmed up. Then watch for bubbles in the coolant overflow tank. If the head gaskets are leaking compression you will see bubbles.
If no bubbles with this check, good chance the intake is leaking through the coolant exit from the heads to the intake.
Part of tuneup.since the introduction of EFI is to retorque the intake manifold bolts. Rarely gets done in flatrate shops, or any shops for that matter. Try torquing the intake bolts may stop the leak.