Engine overheating?

No, there is no white smoke. Oil is fine, no evidence of water in it.

I had a problem with an anti freeze leak due to a bad intake manifold gasket. The van would run hot and I could see the leak, more of a weeping, on the drivers side toward the rear just at the manifold seam.

I would add water and use the bleeder values whereby the heat and temperature worked okay until I could get around to replacing the gasket. The engine never overheated.

Well I finally replaced the gasket and stopped the leak. Everything seemed to go well until yesterday when the engine's temperature started running hot again, looking under the hood I found that the reservoir was bursting at the seams.

When the engine cooled I removed the radiator cap and the water poured back into the radiator. I needed to add a little water and bleed the valves again. Engine starts and I have heat in just a few minutes like usual.

There are no leaks that I can see but before I drain it to put the antifreeze back in I am wondering if I have another issue given that Dex-cool was the initial antifreeze.

Thoughts?

Really, I hope not but will test.

It has no other signs, runs smooth, no water in the oil, no milky goo on the oil cap, no bubbling in the radiator. HO2S Heater performance bank 1 Sensor 1 upstream has an issue but I’m told that sensor just needs to be replaced.

Forty years ago I replaced the head gaskets on my Buick Rivera’s 430 cu in engine due to water in the oil. Upon completion the water returned to the oil a few days later and I found out the issue was caused by a $10 heater control valve that had a pinhole leak in the diaphragm and was letting water into the vacuum system. I’d hate to rip this engine down again and find out it wasn’t the gaskets.

Thanks

Car was overheating. I thought it was the cooling fans one does not seem to be working the other one is. After I change the fuse, I found a leaky water pump.
I change the water pump filled up car back up with antifreeze and water started it up and drove to town. Car still says it is getting hot when it reaches a certain temperature and will not crank over at all.
The motor and everything seems cool to the touch.
Could the coolant sensor malfunctioning cause the car not to start by saying the car is hot when it is not?

Our car is constantly overheating. We have replaced the radiator, the thermostat the water pump and the head gasket. We have bled the radiator and are still not seeing our temperature decrease. Can you please help us?