I just bought this Civic, The guy was running only water in the coolant. I drained it and didnt fill or bleed it properly or something, now when i drive it it overheats. If i let it idle it slowly cools. when it overheats the overflow container bubbles and the top hose is the only one hot! My fan does come on but it dosent blow warm air inside only cold. I try to bleed the system but only steem comes out no fluid. I see alot of info on blown head gaskets, i havent driven it hard yet so i should be that. Any help would be great! Thermostat? Bleed it more? More Coolant?

 

Try to properly bleed it out, i.e. top off radiator with bleeder valve open and heater core open (heat set to hot); if you are still getting bubbles after that it could be a likely sign of a blown head gasket.

 

SO i bled it and everything was working good for a while then stated to oveheat again, boiling in the resovoir. I am tring to do bleed it again but now it wont even blow cold air, I am going to check it again once it cools Should i replace the thermostat? How big a job is repalcing the head gasket?

 

I have a D16 in a 89 Si im not sure how much time and money i want to put into the motor. Right now i just need something that runns proper. It was fine till i put coolant in. I guess thats why the previous owner had only water in it. The Head gasket dosent look that bad to change, ive never done it before but i have a manual. Know how long it will take? I should just need basic tools and torque wrench i think.