Bubbles mean that your coolant is boiling, which is bad. First think I would check is the radiator cap. The radiator cap keeps the proper pressure in the cooling system which raises the boiling point of the coolant. If your rad cap is not keeping the correct pressure, you coolant will boil. Also, the coolant is getting too hot which causes it to boil. Is the engine overheating?

 

bleed ur system, get a wrench and turn the bleeder nozzle and u should have some air come out of it

 

yes,it is overheating,and i bled it a million times. i thought about the rad. cap ill find one. could it be the water pump??

 

if u take out the housing were the cam gear is located [i forgot the name} u should see the top of the waterpump, but the top of it has to holes on it and if they leek or c water come out of the holes the pump is bad. but dont think is the pump check your spark plugs for leakage good luck

 

im gonna check everything, i think it could be the the head gasket. i just dont want it to be. it will run fine for like a week then it will start to over heat, ill baby it home,then put coolant in it,bleed it and it will be fine again. but there is no smoke,nothin under the oil cap, and the oil is good. ill take it to work and pressure test it. if that comes out good im not even gonna bother with the radiator cap im just going to buy a new radiator off ebay or something.

 

If the reservoir stays full (perhaps even overfull) but the radiator becomes empty you just need a new cap, or there is a leak in the hose between the reservoir and the radiator.

 

thanks for all the help guys, im thinking it is the cap to because i pressure tested it today and it held solid. im gonna pick up a cap tomorow and hopefully thats all it is thanks once again guys

 

ok bought a radiator cap today and it didnt fix it its still getting hot. i did a pressure test held up good,thermo opens,water pump isnt leaking, fan is coming on i dont know what the hell to do. im soon going to blow it up and swap in an h22