My son has a 95 civic that has started overheating. He changed the thermostat, but it is still overheating. The heater also was not putting out hot air, he cleaned the heater core and this helped. I have not had time to check it out and intend to this weekend. Never worked on a Honda, any ideas where i need to start, or what it may be?

 

Check the anit freeze coolant.

 

antifreeze is ok, he added and filled after changing the thermostat.

 

Could be clogged somewhere.

 

bleed th ecoolant. hondas will overheat with just a few small bubbles in the system. plus, check the coolant level every time before you drive it (when its cool) and add as necessary. otherwise, get a flush and fill done. it sounds like low coolant or blockage.

 

Make sure the fan is working properly as well.

 

could be the head gasket to. with problems like this it could be anything, but check the little things first.

 

could be as simple as a faulty cap.