2G Coolant spraying from rubber hose between OFH and large water pipe T

[Gwaihir]

I just finished installing my 16g and was performing the leak test before taking it on the road. Ran on the jack stands fine no leaks (oil, air, water). I get it off the jacks and bring it for a short drive down the road, maybe 1/10th of a mile. I get back and now there is a small oil leak at the bolts that connect the oil return to the 16g turbo, easy enough fix.

There is also what a appears to be a spray of coolant toward the block and manifold, as well as a coolant spray near my OFH. So I jacked the car up and found that the hose that connects the water main to the OFH is indeed wet around both ends and would make sense from a spray perspective that it's the source.

My questions are why would this happen now after a 16g install when I didn't touch the rubber hose that goes to the OFH? Is there something wrong with my water lines to the turbo that has increased pressure in the water circulation system? Should I undo my turbo water lines and run the 16g without coolant to see if the issue goes away before I swap the hose (ruling out if it's the turbo/lines causing the problem) or should I just replace the hose? If there is back pressure in the water lines would that cause a problem with the engine? I have a feeling the hose is the 20+ year old stock hose, is it just time to swap it? If I put a new one on and it doesn't spray how can I check to make sure my engine is ok?

It seems to only spray coolant from the hose ends if I get the engine above 2k RPMs. If I stay below that or idle it doesn't leak at all.

 

[donniekak]

Let it cool down and pressure test to verify where it’s leaking. If it’s a hose replace it, and the clamps.

Stuff like this happens all the time when working on 20 year old cars.

 

[Vegas Smith]

75% of the time it's caused by something you did and 25% it's just a coincidence that an old part died while the car was being worked on.

 

[Gwaihir]

Replaced the hose, so far it seems to be holding fine and no more leaks. Just had me freaked out because I didn't work on that line at all so I wasn't expecting a leak from it. The car seems to be running ok and temp gauge is reading where it use to with the old T25 in so I think the coolant flow is fine.