Water in New EGR Cooler/EgR/4th intake

After washing those components, you need to let them dry before reinstalling them.

 

I haven't taken apart a ton of EGRs coolers, but I can say that water vapor is a major constituent of exhaust. Frankly I wouldn't be surprised if you had some amount of condensation in the EGR, because the cooler is lowering the temperature of the gas and it probably condenses some degree of liquid out of it. I can't say I am confident in that statement but it's something to consider.

 

A few water droplets are common in my experience.

 

As bdc101 mentioned also, the main things in exhaust are carbon dioxide and water. Whenever the cooler/valve/pipe/manifold are not all well warmed up, there can be clear water condensing there.

One of the ways a Gen 3 can have a loud startup rattle that isn't head gasket is the one that only happens when the last use of the car was very brief and the engine started but never warmed up. On the next start there can be enough clear condensed water in the manifold EGR passages that it gets snorted into the cylinders on the initial start.

 

This is what I tell both the two gen three drivers here on the property when you fire the car up make it worth your time go for a 25 minute ride I don't care smoke a cigarette whatever it is you're going to do but don't run from here down to the gas station grab a pack of cigarettes and run back here to the house You might as well go for a drive for 20 more minutes Why not You already got out in the cold to get in the car now it's warmed up You might as well ride a few minutes The gas isn't the point the engine is getting 46 miles to the gallon you can afford a 20 minute ride to keep your engine from condensating and rattling itself to death I would assume that's going to cost you 5K when time comes.

 

This is why my red solar roof car is sitting at 365,000 and didn't get its first rattle until I posted that here a couple weeks ago by summer time the head gasket will let go full rip and it'll be done.

 

Another hypothetical cause of water in EGR passage, is leakage within the cooler (heat exchanger) between the exhaust passage and its internal coolant path. That would be a gross defect, unlikely in a new genuine OE cooler. That would be easy to check with cooler off car.

Whether that water is related to the fuel trim isn't clear to me. Suggest checking for vacuum leaks resulting from the EGR change.

 

That water would be pink and smell like Super Long Life Coolant.

The water you get from exhaust being water isn't pink; it's just clear water that condensed from hot vapor to liquid.

 

Which might be overlooked if the volume is not sufficient to make that distinction obvious.