Assuming your 40J is just like my 40J........
The "hose" you see is actually a water drain valve. If the water is coming OUT of the valve then rep0lace the valve. If it's draining down the OUTSIDE of the valve then take a close look at your water pump. The same symptom on my 40J turned out to be the water pump and it was easily replaced.
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KIX
'02 Ultimate Advantage 40J Spartan MM - Cummins ISC
2013 Jeep Rubicon JK Unlimited
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