A pressure tester is an almost must for finding leaks. Although kind of expensive, it saves you from burns and gives you more time to fine the leaks. Sometimes an autoparts store will let you rent one, but many times they don't have the adapter to fit the smaller radiator cap. More than likely it is that hose, but it is so crowded under that side, it is very hard to see.
What you might be able to do is get the car up on jack stands and let it run while looking at the engine from underneath. Just make sure the car is secure, preferrably both ends up.
Let us know.
Russ
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