Step | Action | Value(s) | Yes | No | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
DEFINITION: The engine temperature lamp comes on and stays on, or 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.
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. Refer to Radiator Replacement . Does the engine still overheat? | -- | -- | System OK | ||||||
