94 Altima 250k miles - pestering overheating issue

[acuevas123]

Hey folks,
First off thanks to everyone for their help.
I have been dealing with a pestering issue of over heating with my 94 Altima.
A few months ago my radiator broke while on the freeway and barely made it home.

I changed the radiator, water pump, and thermostat all new. Removed the intake manifold to replaced the water lines and hoses behind it. Also, pulled a used intake manifold and AIC valve from the junk yard(the donating car had only 120k miles) and replaced those. Thirdly, since the manifold was off I also replaced the temp switch, heater switch, pcv valve, knock sensor. I also flushed the heater core.

No white smoke from tail pipe, no bubbling at radiator cap(have not done block test) and the oil cap does not seem to show moister. No visual signs of a cracked head gasket.

Can turns on good, idles well and warms up and hold normal temp - just below halfway point. No visible water/coolant leaks. The issue of overheating comes into play when I run the vehicle after about 20 minutes. It begins to over heat and both radiator fans come on and spin faster as vehicle increases in temp.

The only two things that I have noticed is that the radiator hose, on passenger side, that runs from top of radiator to engine at the valve level makes a "gurgling sound" when car is off. Also, the fluid reservoir has water in it and not coolant. Maybe the water is just left over from previous.

Any all all help is most welcomed!

[Timothy S]

Do you have any coolant leaks? Coolant shouldn't boil if it is under the correct pressure from the water pump. Either your new pump isn't working right, or you have lost the pressure either due to clogged passages in the engine, or some type of leak. But, I think you might want to drain the water out and put distilled water and coolant in, because it has a higher boiling point, and a lower freezing point. That should help a little, and save you from ever having the coolant freeze and crack the block in the winter months.

[acuevas123]

Thanks Timothy S,
I did a flush of the system and then ran some blue devil head gasket sealer. Not really sure if it worked. But, the overheating has stopped. However, when I run the car and then turn it off, the system pushes water into the overflow tank. Doesn't look right. I tried bleeding the air as per the instructions on the repair manual but no collant comes out of the air bleed hole. Any ideas as to why?

[counterfeitxerox]

Water is boiling off.... use 100% aintifreeze and see if that helps. alot of people would maybe advise against this but water bubbling means its boilng off. i did this to a cavalier once after i changed the water pump i couldnt properly burp the system or something but undiluted antifreeze did the trick. maybe u have a bubble somewhewre i mean u did replace the WHOLE system. and not just a radiator flush. all ur passage ways were open.