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1997 Mustang GT Overheating Issue

  • Thread starter Thread starter Mustang1988!!
  • Start date Start date Sep 3, 2025
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Mustang1988!!

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Hello, I have a nice, low mileage 1997 Mustang GT Convertible. I purchased it from the original owner. It continues to have an overheating issue. The following has been done: thermostat has been replaced, twice, the intake replacement has been done, water pump and radiator has been replaced as well but the car continues to overheat when driving it. It does not have water in the oil, it's not making any funny noises or smoking out of the tail pipes. I am concerned that possibly the original owner had a cracked intake and overheated the car causing possibly a warped or cracked cylinder head or block.??? How do I check for that. The car is immaculate otherwise and I just want to get the issue resolved. I appreciate any help or guidance.
 

gkomo

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What is your coolant burping procedure?
 

Noobz347

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Have you had the system pressure tested since all of these parts were swapped?

Do you still have one of these installed?




Pull codes!
 
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Mustang1988!!

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gkomo said:
What is your coolant burping procedure?
Click to expand...
I followed this process when it over heated the 2nd time. ensure the engine is cool, then park on a level surface and turn the heater on to the highest setting. After filling the cooling system with coolant using a spill-free funnel, start the engine and idle it. Periodically squeeze the radiator hoses to help dislodge air pockets, and watch for bubbles in the funnel. Continue this process until no more bubbles appear, the cooling fans cycle twice, and warm air comes from the vents, confirming the thermostat has opened and the air is purged.
 

gkomo

now i can hopefully expect to receive the shaft
Aug 2, 2024
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San Diego, CA
Sep 3, 2025
#5
  • Sep 3, 2025
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Mustang1988!! said:
I followed this process when it over heated the 2nd time. ensure the engine is cool, then park on a level surface and turn the heater on to the highest setting. After filling the cooling system with coolant using a spill-free funnel, start the engine and idle it. Periodically squeeze the radiator hoses to help dislodge air pockets, and watch for bubbles in the funnel. Continue this process until no more bubbles appear, the cooling fans cycle twice, and warm air comes from the vents, confirming the thermostat has opened and the air is purged.
Click to expand...
Only change i would do is jack the front up as high as you can, or park on a hill. You want the radiator fill cap/opening to be like the highest point in the system, which will help air escape.
 
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squeak93

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gkomo said:
Only change i would do is jack the front up as high as you can, or park on a hill. You want the radiator fill cap/opening to be like the highest point in the system, which will help air escape.
Click to expand...
This right here is the only way I've been able to "burp" a 2v or 4v cooling system.
 
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