Heard that passport is clone of rodeo.Anyone else heard this and is it true?Can i use passport parts on my rodeo?Also,the fan is contantly running,but not getting to operating temp,just stays cold.Thinking thermostat or water pump.

You are correct. Passport is is just a rebadged Rodeo.

Thermostat and water pump sounds like a good place to start then I would swap out the rad....

Just so we're clear on this:

The Passport is 100% Isuzu Rodeo. There is nothing on it made by Honda. A lot of people think it's the other way around, that the Rodeo is a Honda, just because Honda is the bigger name plate.

The passport is isuzu made. Some of the older passports even say isuzu on the engine.

In addition to Isuzu making the Passport for Honda, they also make the Acura SLX, which is a re-badged Isuzu Trooper. The Honda Passport and Acura SLX are 100% pure Isuzu.