BOILING RADIATOR!

[rap]

Sounds almost just like a problem I had with an Dodge Omni years ago. Turned out to be a leaking head gasket. Check for excess steam after cold start in AM & milky goop in oil

[kevyrev]

Thanks for the suggestion rap. The oil is normal in color.
Robokarate- I flushed with the garden hose.
Rayanprins13- It is not shooting into the overflow but it's boiling very rapidly. Little steam but rapid boiling. Really think it could be a cap? It was so hot last so the sticker on the cap slid off.

[ryanprins13]

If the cap holds no pressure and its just water now any surface inside the block above 212f will boil. Combine that with a plugged up rad that wont cool the water and yes it could be that. 'Boiling' rapidly could also be a head gasket leaking compressed air into the coolant but a new cap and flushing is easiest to try first.
Sometimes a headgasket can blow just between a cylinder and the coolant. You could take the cap off and start it cold and see if theres bubbles or coolant starting to get pushed out.

Sent from my SM-G920W8 using Tapatalk

[kevyrev]

I did fill it back with coolant after I flushed it out. I did start it without the cap when I just filled it back with coolant after the flush. So if I'm getting anything in the overflow, does that mean the cap is failing and needs replaced. Maybe I can get a t-stat and cap tomorrow and see what happens.

[bravekozak]

If you make an adapter hose to connect your rad to a garden hose, then take out your rad and send water through it, you will be able to see if the same amount of water comes out the other end.
I had to recore a rad because only 5% of the tubes were still open. The rest were plugged.
Change coolant at regular intervals.

[RobotKarate]

Tap water will eventually rust out your engine block. You should really only use distilled water for flushing.

[Studebaker]

At first start when cold are there any bubbles in radiator?

[kevyrev]

Did not see any bubbles in coolant when I cold started- Studebaker. I was starting to wonder if it's a blown head gasket but my oil is not milky but now I'm wondering if it could be simply just the radiator cap. I have the new thermostat to install but got too dark when I got home. Going to just go ahead and rule that out and can't hurt to just replace it. Anybody else think it could be a cap problem possibly. It doesn't boil into overflow until about 15-20 min.