Silver97 said:
The temperature in my car has been rising beyond the normal limits....it is about 5 degrees from hitting the red zone....I checked the codes and there were none...i checked the fans and they are working....checked the radiator fluid and it is ok....should I change the thermostat? If so how do I do it??? what else could be causing this problem???
help?????
97 corvette 72,000 miles automatic.....
Thank you
WARNING!!!!
*****BE CAREFUL... DON'T GET BURNED... HIGH PRESSURE... HOT FLUID... STEAM...
If you are not comfortable doing this take it to the dealer or a good repair shop.
Engine Overheating
Step
Action
Y =Yes
N = No
1
Inspect for a missing or damaged radiator upper baffle and/or center air deflector.
Is the baffle or deflector missing or damaged?
Y Go to Step 8
N Go to Step 2
2
Inspect for a loss of coolant.
Is there a loss of coolant?
Y Go to Step 3
N Go to Step 4
3
Fill the system to the specified level. Refer to Loss of Coolant .
Does the engine overheat?
Y Go to Step 4
N System OK
4
Inspect for low coolant protection. Refer to Coolant Concentration Testing .
Is the coolant to the correct concentration?
Y Go to Step 5
N Go to Step 8
5
Inspect for a loss of system pressure. Refer to Cooling System Leak Testing .
Is there a loss of system pressure?
Y Go to Step 8
N Go to Step 6
6
Inspect for a faulty engine coolant temperature (ECT) sensor. Refer to Engine Coolant Temperature (ECT) Sensor Replacement in Engine Controls.
Is the sensor operating properly?
Y Go to Step 7
N Go to Step 8
7
Inspect for a cracked coolant surge tank or a leaking hose. Refer to Loss of Coolant .
Is the surge tank cracked or is the hose leaking?
Y Go to Step 8
N Go to Step 3
8
Repair or install new parts as necessary, then retest.
Does the engine overheat?
Y Go to Step 9
N System OK
9
Inspect for incorrect drive belt tension. Refer to Drive Belt Tensioner Replacement - Accessory in Engine Mechanical.
Is the belt tension correct?
Y Go to Step 10
N Go to Step 8
10
Inspect for a damaged water pump driveshaft.
Is the water pump driveshaft damaged or is the seal leaking?
Y Go to Step 8
N Go to Step 11
11
Inspect for obstructed radiator air flow or bent radiator fins.
Is the radiator air flow obstructed?
Y Go to Step 8
N Go to Step 12
12
Inspect for blocked cooling system passages.
Are the cooling system passages blocked?
Y Go to Step 8
N Go to Step 13
13
Inspect for improper direction or inoperative cooling fans. Refer to Cooling Fan Motor Replacement - Electric .
Are the cooling fans and the motors operating correctly?
Y Go to Step 14
N Go to Step 8
14
Inspect the thermostat. Refer to Thermostat Diagnosis .
Is the thermostat stuck in the closed position?
Y Go to Step 15
N Go to Step 16
15
Replace the thermostat. Refer to Thermostat Replacement .
Does the engine overheat?
Y Go to Step 16
N System OK
16
Inspect the radiator cooling capacity.
Is the proper sized radiator being used on the vehicle?
Y Go to Step 3
N Go to Step 17
17
Consult the current parts catalog and replace the radiator. Refer to Radiator Replacement .
Is the repair complete?
Y System OK
