Hi, new to this forum, having some problems with my 05 el,
the car runs fine, live in cold wather -20c, if i start the car to run for warm up 10-15 min, the temp gauge is hot,no cabin heat. I start driving and it cools off but the heat doesn't come until driving on the highway for a couple min. then when slow down in town the heat goes cool, antifreeze is full doesn't appear to have any leaks, any ideas?

 

Sounds like a blown headgasket or clogged heater core, to me.

See here: https://honda-tech.com/forums/honda-civic-2001-2005-78/01-05-civic-cooling-system-q-overheating-fans-inoperable-etc-2889523/

 

Thanks

 

Sounds like the heater core to me

 

Do you have any antifreeze in your oil? But above is correct, headgasket or heater core.

 

?
95% or more never shows coolant on the oil. just loss of coolant from the overflow reservoir.

if coolant on the oil, things would have been neglected for a loooong time or something veeeeery bad happened.