Timing Chain convince me otherwise.

The heat exchanger pipe is the larger pipe on top between the intake and the top of the timing case. It is only about 4 inches long, but it has an o-ring on both ends. P/N: 96761-35035 I practiced installing a few times to make sure it would go smoothly with the glue on the parts. I must have disturbed the tube some how. I will be pulling the intake off in the morning. I will then put a little water back in to see exactly where the water is coming from. I will have to clean and reseal the valley. But that is better than cracking that timing case again. I also need the part number for the intake manifold gasket. I have P/N: 17171-0S030. It appears to be for the right side. I don't the part number for the left side. Would you happen to know?

 

Did you try here? Put in your year, make and model? Type in the part number (or cut and paste). See what the schematics show? I think this shows both side part numbers for an '09-2020 5.7L.

 

I have looked at this. The numbers in the diagram don't equate to the actual part easily. e.g. The picture shows a different number for the right side vs. what I have listed above. I may just suck it up and get the felpro set. They are much closer than the dealer. I live in Rural AZ. Now I am looking at possible issues down the road for knock sensors if I disturb them. They are 150 each at toyota.
I have also watched a video that says don't try to disconnect them from the harness, just remove them as a whole...

 

Is this the knock sensor? Or are they these two I'm pointing at in the second photo? I unplugged all sensors from the engine and valve covers, but left them plugged into the harnesses. I did get the two sensor plugs on the driver's side that go into the top front of the valve cover reversed and had a check engine light. I switched them back and the light/codes went away. That was my only issue on reassembly. Best of luck! This is the code if the camshaft position sensors are plugged in the wrong plugs.

 

Any update? What's the status?