When I got this car I swapped in a used motor cause the old one didnt run. Then I broke an exhaust valve so I put a different head on about 6 months ago. Now the motor is using coolant and overheating. I did a sniffer test and it has exhaust in the cooling system. Since I just replaced the head gasket(oem honda) a short while ago I'm thinking there is another problem. Now I'm trying to figure out what the cheapest fix would be. I think the radiator is clogged from the previous owner using stop leak and rusting so that would have to be replaced as well. I changed the water pump about a year ago. Does anyone know if there is a common problem with the cooling systems on these cars and what my cheapest fix option is at this point? Thanks for any help.