Overheating issues.

[Tkrahn77]

Originally Posted by Corvette95

If you remove the radiator and entire front airbox (not air filter cover- the upper and lower shroud), while not exactly a pleasant job (read tech info stickies for help) , you will find access to the thermostat and hose much easier- congrats BTW on getting it out like you did). You will also have access to the oil filter housing and can fix any likely oil leaks you have there (they pretty much all do). Your fan(s) can also run and be bad at the same time. They just don't turn fast enough to do any good. Compare each fan to each other and make sure they run as needed with a/c pressure switch.

Re: Overheating issues.
I removed the upper and lower shroud. I did the deep cleaning of the radiator put everything back. Refilled the coolant bled the air and is still over heating. This is very tiring.

[richarde]

It may be worth checking that the flow of the coolant has not been modified by a previous owner, for whatever reason. I say that as I do not recognise the 3 photos that you included in your first post. I have attached a diagram of the stock coolant flow.Image1655989833.748808.jpg


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[DRM500RUBYZR-1]

Using a coolant pressure testing tool determine if the system is maintaining pressure.

In 26 years my car never went over 230 regardless of conditions.
It usually operates in the 190-210 range.

Two or three years ago while in slow procession of 400 Vettes to the Ocean City NJ boardwalk, I was alarmed to observe a steadily climbing gauge confirmed by the digital as well.
When it went beyond 240 even with air on and revs up I really got nervous.
Was able to shut down when we finally got parked and was just below the real danger zone.

Driving home at high speed, I was able to maintain reasonable temp.
Every slow down caused a spike.

The cause?

The most minor leak around the lower hose. Minor enough that no drips were observed beneath the car, but enough to prevent the system from pressurizing.

Replaced with a screw clamp.
Problem solved.

Do not over pressurize it as you do not want to stress the heater core.

Worth a try.
Good luck and let us know.

Marty

[Jagdpanzer]

I agree, your photos are not of a typical stock cooling system.


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[DRM500RUBYZR-1]

Originally Posted by Jagdpanzer

I agree, your photos are not of a typical stock cooling system.


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Looking at the pictures, I agree.
However I now see there is also evidence of a long term leak that could contribute to the problem.

Marty

[Karl]

Originally Posted by Tkrahn77

Re: Overheating issues.
I removed the upper and lower shroud. I did the deep cleaning of the radiator put everything back. Refilled the coolant bled the air and is still over heating. This is very tiring.

Is your water pump going out?

How did you burp the cooling system? You need to get the fluid level above the black fill tank with a large full funnel or such and bring up the rpms.