I assume this is the Montero Sport, because it is the one that has the 3.5, the plain Montero has the 3.8.
Anyhow, about the leak, you may have to look from underneath to see the leak and if there is no room to get underneath, you may have to either jack that side up and place a jack stand under the frame or get it up on a lift.
I will see if I can find a cooling system diagram.
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Saturday, March 3rd, 2018 AT 6:22 AM