A couple days ago i changed my thermostat because my car wasn't warming up properly(it was like that for awhile). Everything went fine, i bled the system of air, and took it for a drive everything was fine it warmed up properly and i finally had some nice heat. I didnt drive it for a day or two and last night i was drivin' it and i noticed some steam coming out from under my hood, a little bit was coming out of the radiator cap and the overflow was almost empty. The cap wasnt holding any pressure, so i got a new one. I bled it again and drove around for while and i noticed more steam but it wasnt from the cap, i couldnt tell where it was coming, the radiator was just steaming from the passanger side, and i noticed the lower radiator house isnt getting warm its staying cold and even after i drive it around its still cold. I can drive it around it doesnt over heat it just keeps steaming and its not hold pressure i can just take the cap off after driving. anyone any any ideas whats wrong with it??? i did searches but came up with nothing helpful

 

Try to see if you can do a pressure test on the radiator itself. There might be a small crack in the endtanks.

I just don't understand how it doesn't overheat. Try driving in slow traffic and see what happens, but keep a CLOSE eye on that temp gauge.

 

how did you go about bleeding the system? i work on cars and what i do is turn the heat on full blast and take the rad. cap off and let it run for like 45 mins or so the air will slowly work its way out. how much have you driven the car? if you spill fluid on the rad. it will stem until its all burned off

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by hksb18b &raquo;</TD></TR><TR><TD CLASS="quote">how did you go about bleeding the system? i work on cars and what i do is turn the heat on full blast and take the rad. cap off and let it run for like 45 mins or so the air will slowly work its way out. how much have you driven the car? if you spill fluid on the rad. it will stem until its all burned off</TD></TR></TABLE>

45 minutes? Are you out of your mind? Maybe like 5-10 minutes MAX. Simply turning on the heat while having the car idling for that long won't prevent it from overheating.

EDIT: Maybe you meant 4-5 minutes?