About two months ago I was having an issue with leaking coolant. I replaced the heater core and the problem was fixed; no more leaking coolant. After replacing the heater core I noticed that I wasn't able to adjust the heat very much. On my coolest settings I would have warm air, and on the highest setting I would have very hot air. I have not changed anything but now on my lowest settings I have very cold (colder than my AC) air and on my highest settings I may get luke warm air. I noticed that the air will start to get closer to luke warm as my engine heats up, but once I hit normal temp (about 210-215 degrees) the air turns to extremely cold... I also hear this odd "sloshing" noise. It will happen while I'm driving, parked, or if you rock the vehicle side to side. And lastly I am once again losing coolant. I haven't lost any for two months until now (the sloshing noise has also gotten worse)

Has anyone else had this issue? or something simular?

Thank you

 

you have air trapped in your cooling system.
do a search for the fix, details

basically what i do is run from cold start and throttle and slowly ad coolant, till no bubbles. thats just me.

 

Thanks for the tip, I'll try and do that this weekend and update with results. Quick question when you had air in your system did it affect the temperature as well?

 

yes, the air pockets affected the heat, also the antifreeze to water ration might be off.

 

I thought I had replied to this a long time ago, but apparently not.
so I did what you said and got air out of the system which gave me back warmer heat and got rid of the 'gurgling' sound. However a few weeks later it was back again. very frustrating...

 

You probably still have air in the system or the system isn't completely sealed.