Overheating no hot air in car

[Srt4chode]

I just bought this car 5 days ago, it ran like a raped date for the first 2 days.
It started over heating on wensday, it was a cold night 0-15 degrees maybe.
Now to the technical stuff... We changed the thermostat the original one was covered with almost a silicone gunk like they used fix-a-seal, changed the coolant/antifreeze, bleed it from the bleeder.
The mechanic hooked his magic computer thing up to it and it said the intake air temperature senos is reading -40 degrees f idk if that has anything to do with this.
I took it for a couple road tests and it seems to stay at 200 degrees if I beat on her, and if I drive conservatively it over heats.
I also tried a breather test in the radiator and the coolant tank, no sign of co2 present meaning no head gasket issues.
Idk what else I can do. I just bought this car and I'm brokeeeee haha any imput is much appreciated.

[Orangeblastn-byu]

Try pressurizing you coolant system and check for leaks.with no heat could be a bad heatr core

[BostonSRT]

Sometimes when my car overheats ny heat goes away but then it comes.back if I start driving again. I'm.thinkin it was air in my system. I'm stumped also. I need to get my car pressure tested though.

[Srt4chode]

I can't really take my car anywhere cause I don't want to warp the head and blow a gasket or anything like that, we are going to try and bypass the heater core (which sucks cause it's like sun 20 degrees here, but if that's where the problem is then looks like ill be needing a heater core lol...

Also my heat just doesn't work at all, it worked great the first two days along with the car not over heating but well that all changed

[Ridin59vette]

Quote: Originally Posted by BostonSRT

Sometimes when my car overheats ny heat goes away but then it comes.back if I start driving again. I'm.thinkin it was air in my system. I'm stumped also. I need to get my car pressure tested though.

If it is overheating and your losing heat, More then likely you have air in the system which means not enough antifreeze

[Ridin59vette]

OP Did you have heat when you bought the car?

[SwinginACR]

Quote: Originally Posted by Ridin59vette

If it is overheating and your losing heat, More then likely you have air in the system which means not enough antifreeze

I would suggest this. When I swapped engines last year I had to start fresh, no coolant what so ever. I filled it, bled it, went for a drive. It tried to over heat about a mile down the road. I turned around and bled it out a couple more times and that took care of it. I was worried that I messed up torquing the head studs down or something like that with the HG.

[Srt4chode]

Quote: Originally Posted by Ridin59vette

OP Did you have heat when you bought the car?

Very much so, and lots of it, cause the rear passenger window got smashed out

[Ridin59vette]

So it worked or it didnt?

[Srt4chode]

It worked up till wensday morning when it started over heating

[Ridin59vette]

What type of antifreeze/water mix did you use? Where are you located?

[Srt4chode]

There was what appeared to be orange, and I first used 50/50 universal, but I went back and bought the full strength orange and re-did it.

And I'm located I'm Scranton Pennsylvania.

[Ridin59vette]

So it's been bitter out. Is the car garaged? Long story short, this sounds like when I had a chunk of Ice in my heater core.

[Srt4chode]

The night I picked it up it was I put it in the shop where I work once I got it back and began working some bugs out, then I took it home after work, and it was in the cold all night, once I noticed it was above 200 I made a change of plans of where I was going and parked it, over flow tank was gurgling, poured 50/50 premix universal in it, got it to my uncles house began trying to thaw it out thinking it was ice, flushed it filled it with 50/50 uni didn't bleed it the correct way... then today we bleed it through the bleeder practically no air came out... took it for a road test would hit 245 if I wasn't being rough on it, still no warm air...

[Ridin59vette]

You have air in your system still, It can take several test drives and bleeds to get it all out. If your overflow was gurgling it's air in the system.