my passport has poor has a 170 degree this a normal on 1997 Honda Passport

can i put a bigger thermostat in it.any helpfull tips would be great

Asked by for the 1997 Honda Passport
Thermostat called for opens between 166 to 173 fully open at 194 degrees. Have you tried changing the thermostat just in case its weak. I just had a Jaguar today, I had to disconnect the hoses at the heater core and flush/reverse flush the heater core to get the heater to start working/dislodge crap. There is a company that independent auto repair shops get their information from, this same information is available inexpensively for people that work on their own cars.. The information is year make and model specific, covering repair procedures, torque specifications, fluid capacities and specifications, service bulletins, component locations, wiring diagrams ect.... Alldata is very easy to navigate