you should only have to take loose the heater hoses where they go into the firewall and of course the heater core itself
A "heater" or a "heater core"?
how to take off an alternater 94 Honda passport
detach it from the batter ...
Buy a Toyota
WE DON'T KNOW!
The heater in the CRV Honda is not working . How do I fix this
replace it
Replace Thermostat
remove and replace.
They just bolt onto a bracket, you just have to disconnect the wire after disconnecting batt and can do with a few handtools, but must remove the belt. That is easier if you can round up a helper
How do you add freon to a 1999 Honda Passport
Over 5000$