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Greetings, i'm new to the forums so I don't know if this is exactly where to post this but here I go anyways.

I changed the thermostat and cannot get the airlock out of the engine, so it keeps overheating. How should I go about this i've tried pressure testing it, and tried putting it up on ramps to let the air rise and bleeding it but I might be doing it wrong. Any help would be greatly appreciated.

Thanks!

 
Rep Power: 812

drive the car around til it reaches operating temp. park on a steep incline or raise the front of the car. very slowly and carefully with alot of towels around the radiator cap, open it. some coolant will splash out but after that it should be fine. keep the car running, and rev the rpms to 3k occasionally to keep it warmed up. now to get the air out turn the fan on full and the temp dial to hot. watch the radiator for bubbles and add coolant to keep it at the top. you can squeeze and tap the two radiator hoses to make air come out easier. this process may take 15-20 mins and you might have to repeat a few times. just keep doing it til you no longer hear the loud water rushing noise in the dash when pressing the gas.

 
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but i dont hear a rushing water noise in the dash and ive done what u said all week pretyty much

 
Rep Power: 812

you may have another problem then. most cars ive been able to get the air out after 15 mins of bubbles coming out. are you still getting large bubbles coming out of the radiator? if not, you may have another problem. hopefully you used a honda thermostat cause i had a similar problem and the cause was using an aftermarket version that wasnt opening as much as it should. could also be a bad radiator cap or other cooling system related part (ECT sensor, bad fan sensor or motor, inaccurate temp gauge, clogged radiator or heater core, etc). what are the conditions that cause the overheating?

 
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it doesnt over heat just running at an idle but when u start driving it heats up and the lower rad hose stays almost ice cold

 
Rep Power: 812

okay see thats a thermostat issue. same exact thing happened to our accord. once it warmed up it would start to climb to the hot position, and when i pulled over the lower hose was completely cold. this means coolant wasnt getting thru the thermostat to circulate in the system (basically like not having a radiator). i tested the old thermostat which they had used a cheap junk one last time and it barely opened in boiling water. its supposed to open like 1/2 inch, but this one barely cracked more than 1/4 inch or less prolly. replaced with a genuine honda thermostat and problem solved. the honda one is a ton better quality when compared to the aftermarket. no more overheat and the lower hose gets hot now after a long drive. it has to be a thermostat issue because it is self controled. when the coolant gets physically warm enough, it will cause the thermostat wax filling to melt and the spring will expand and open the thermo to let coolant out to the radiator. if coolant gets too cold, it will start to close to restrict coolant flow to the block and not the radiator. if you already replaced it with a genuine honda thermostat, then most likely there is a clog in the radiator that is preventing normal coolant flow. you can figure out for yourself by getting an infrared thermometer and pointing it at various places in the radiator fins. if some spots are really hot and others are cold, theres the problem. also depending on the age of the water pump, its possible that the fins have corroded and are not able to move coolant effectively anymore. but that is more of a rare case than thermostat or clogged radiator. you installed the thermostat with the spring side facing into the engine block right?

 
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ya i put the spring side to the block, was there a big price difference between the aftermarket and the honda thermostat do u no? and thanks for the help ill have to get a honda one monday and let ya know hoow that works out

 
Rep Power: 812

i got my honda one off ebay from a dealership for $15 shipped. its worth every penny and will prolly last 10+yrs. my 2002 civic is still on the original tstat. most aftermarkets are around $10 at auto store and you have to buy the gasket separately. check out www.hondaautomotiveparts.com they are usually pretty cheap.