Step | Action | Value(s) | Yes | No | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
DEFINITION: The engine temperature lamp comes on and stays on, the temperature gauge shows hot or coolant overflows from the coolant recovery reservoir onto the ground while the engine is running. | ||||||||||
1 | Check for a loss of coolant. Has there been a loss of coolant? | -- | ||||||||
2 | Refer to Loss of Coolant . Does the engine still overheat? | -- | System OK | |||||||
3 | Check for a loss of system pressure.
Has there been a loss of system pressure? | -- | ||||||||
4 | Correct the system pressure. Does the engine still overheat? | -- | System OK | |||||||
5 |
Is there low coolant protection? | -37°C (-34°F) | ||||||||
6 | Correct as necessary. Does the engine still overheat? | -- | System OK | |||||||
7 |
Is the tensioner working properly and the tension correct? | -- | ||||||||
8 | Replace the tensioner as necessary. Refer to Drive Belt Tensioner Replacement. Does the engine still overheat? | -- | System OK | |||||||
9 | Check to see if the timing is retarded by a malfunctioning Powertrain Control Module (PCM). Is the timing retarded by a malfunctioning PCM? | -- | ||||||||
10 | Correct as necessary. Refer to Setting Timing or IC Performance Check in Engine Electrical. Does the engine still overheat? | -- | System OK | |||||||
11 | Check to see if any of the radiator fins are obstructed. Are any of radiator fins obstructed? | -- | ||||||||
12 |
Does the engine still overheat? | -- | System OK | |||||||
13 | Check to see if any of the cooling system passages are blocked by rust or scale. Are any of the cooling system passages blocked by rust or scale? | -- | ||||||||
14 |
Repair as necessary. Does the engine still overheat? | -- | System OK | |||||||
15 | Check for a pinched or kinked coolant recovery reservoir hose. Is the reservoir hose pinched or kinked? | -- | ||||||||
16 | Replace or reroute the hose as necessary. Refer to Coolant Recovery Reservoir Replacement . Does the engine still overheat? | -- | System OK | |||||||
17 | Check for an inoperative cooling fan. Refer to Electrical Diagnosis in Engine Electrical. Are there any inoperative cooling fans? | -- | ||||||||
18 | Repair or replace the cooling fans as necessary. Refer to Cooling Fan Replacement in Engine Electrical. Does the engine still overheat? | -- | System OK | |||||||
19 | Check for a loose, damaged, and/or missing deflector. Are there any loose, damaged, or missing deflectors? | -- | ||||||||
20 | Replace the deflectors. Does the engine still overheat? | -- | System OK | |||||||
21 | Check to see if the thermostat is stuck in the closed position. Is the thermostat stuck in the closed position? | -- | ||||||||
22 | Replace the thermostat.
Does the engine still overheat? | -- | System OK | |||||||
23 | Check for a faulty coolant pump. Is the coolant pump faulty? | -- | ||||||||
24 | Replace the coolant pump.
Does the engine still overheat? | -- | System OK | |||||||
25 | Check for an incorrect radiator. Is the radiator correct? | -- | -- | |||||||
26 | Install the correct radiator. For Chevrolet or Oldsmobile, refer to Radiator Replacement . For Pontiac or Buick, refer to Radiator Replacement . Does the engine still overheat? | -- | -- | System OK | ||||||
