Overheating after "mess under intake"

[Vlad_318iS]

So I just finished with the mess under intake.

replaced:
-plastic coolant pipe from engine block
-coolant hose from plastic pipe to heater core (by firewall)
-coolant hose from head to heater core (by firewall)
-fuel injectors and fuel lines under manifold.
-deleted throttle body heater plate and all associated coolant/vacuum lines.
-drained and refilled BMW coolant.

=took a while to start since the car was sitting for 2 months.
=sounded like it backfired? twice.
=you can hear a loud thud/click when switching key to final position before start.
=took me 5 minuted to start car and it ran nice and smooth but a little louder than normal at first (like a heavy feeling)
=THEN IT STARTED OVERHEATING as I was running the car with coolant cap off!
=NO HEAT FROM THE HEATER also.
=the two coolant hoses that go to heater core are completely cool while all other hoses are hot to the touch!

Now I don't even know where to look. I was meticulous to tighten and put everything back like it should. Last time the car ran it ran fine. Never had problems with overheating.

Any help would really be appreciated!!

[Balleristic31]

You need to properly bleed the coolant. I'm guessing u have a huge bubble in the system causing the overheat.

[tonywonder]

waterpump or thermostat

[Vlad_318iS]

whew...so,

I just got a hunch that I had a huge air bubble in there. I basically refused to believe that it was something broken because it ran fine before the refresh under intake.

I ran the car until the gauge went to 75% temp and shut it off. Then unscrewed the air release valve, let the air out and filled up to the "cold" mark. I repeated that a few times until the gauge would only go to about 60% and stop, no matter how much i revved.

It was dark, I flash the lighter in the overflow tank and I see milky!! I was like "ah, dang it!" and sadness just felt :sad:. Then i decided to flash the flash light on the side of the overflow tank to see the refelection of the coolant again. And it was still blueish! :razz: What a relief.

I continued releasing air and filling coolant until I got bubble with coolant and then just coolant out of the air release valve.

And Viola! Problem solved. Thanks for all the help! Super excited as you can tell ;)

[tonywonder]

you win this round balleristic -___-

[Balleristic31]

you win this round balleristic -___-

This made me lol hard.

So i sig'd it.