Quote:
Originally Posted by Tom Wells
Things to check: thermostat & cap, fan turning in the correct direction, standard pulley sizes (no undersized crank pulley/oversized waterpump pulley) and on a small block, water pump rotation in the correct direction.
If these are OK, nearly always overheating at a stop indicates an air bubble.
Most Cobra owners go into denial about this.
It is the cause in a large number of these cases....
Your radiator sounds big enough.
Just sayin,
Tom
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Thanks for the suggestion, Tom. Here is what I did when I changed out the coolant...once I had the radiator as full as possible I capped the place into which I fill the radiator. It is clearly the highest point in the cooling system, standing well above the area where the thermostat is located. I ran the car up to temperature (felt the top hose to make sure hot coolant was making its way past the thermostat), then filled the system. I did this at least 3 times and got it to the point that there was no more room for coolant every time I would check it.
Then I jacked the front end up enough to set the tires on some ramps I have and proceeded to repeat the process described above. Only once would any coolant fit into the cooling sytem, after that the coolant level was consistently at the location where the radiator cap seals against the fitting (my Griffin radiator does not have the cap on the radiator)
Should I be doing anything else to make sure there are no bubbles in the cooling system?
Thanks...not in denial here, just looking for answers. Today I had the Cobra out about town and at one point the temp gauge read 210*. The ambient temp was about 95*, sure wish I had an infrared thermometer to measure the temperature of the asphalt!
I am pretty firmly convinced that adding shrouds to the side of the radiator will help, will start working on cardboard templates so I am ready when the car is put up for the winter.
Cheers!
Doug