Hum, not leaking at idle
That cooler does not see high pressure, it is return flow to the tank (I think). I would bet it sees under 100 PSI if that.
I resealed mine by taking it to a radiator shop. Depending on where the leak is they may be able to fix it for a hundred or two and in a day rather than waiting for fabrication of a new unit. Pretty easily removed also if you want to send it out for testing.
Yes, a hose can cause this also so good idea on replacing the hoses, cheap easy attempt.
Fire, yes, absolutely you do NOT want to be spraying transmission fluid all over your exhaust and turbo. I like the transmission bypass hose idea very much. Very easy to make and install, great idea by Happycarz.
Now the bad news, if it is only leaking when driving that tells me a couple of things.
1, maybe only leaking when the temperature is elevated causing the fluid to be thinner and easier to leak.
2, increased circulation at higher RPM maybe is exacerbating the leak.
3, the leak is actually coming from the hydraulic fan, hose or controller and is leaking when being taxed.
Certainly more possibilities but those 3 pop to mind.
Cleaning is important as it will take you to the leak with less effort and reduce the possibility of fire, however if you are seeing fluid all over after a few miles, you should be able to track the leak down without a major detail clean up.
If you know how to use your idle up, get it cleaned and run it on high idle (1600 RPM) for a while. It will take 45 minutes or so to warm up even at that RPM. But that will put your flows, temperatures and pressures all at an elevated level and the leak should make itself known.
Watch that fan (and engine belts), don't get your hands or loose clothing near them! Have hearing protection and good flashlight also so you can investigate more easily.
Everyone is on different levels and has different abilities so just do what you can do but please be safe.
Generally speaking, gravity wins and fluid leaks are above the wet spot. Air flow from the radiator can influence that but only so much.
Originally Posted by 2008DYN
Not sure. Going to replace the second hose and clean everything as best as I can. It doesnít leak at idle. I will be traveling ten miles in two months. If it still leaks I will look at the cooler or something else. Did your cooler leak at idle? How could you tell it was the cooler. Where did you turn to get a replacement? Btw, thanks for the reply.