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 surge tank onto the ground while the engine is running. | ||||
1 | Check for a loss of coolant. Is there a loss of coolant? | -- | ||
2 | Fill the system to the specified level. Does the engine still overheat? | -- | System OK | |
3 | Check for a missing or damaged radiator upper air deflector, baffle, or center air deflector. Are there any missing or damaged deflectors or baffles? | -- | ||
4 | Repair or replace any deflectors or baffles as necessary. Does the engine still overheat? | -- | System OK | |
5 | Check the coolant concentration. Is the coolant concentration adequate? | -- | ||
6 | Correct the coolant concentration as necessary. Does the engine still overheat? | -- | System OK | |
7 |
Does the engine still overheat? | 103 kPa (15 psi) | System OK | |
8 | Check for a pinched or kinked radiator surge tank hose. Is the surge tank hose kinked or damaged? | -- | ||
9 | Reroute or replace the hose as necessary. Does the engine still overheat? | -- | System OK | |
10 |
Is the tensioner working properly? | -- | ||
11 | Replace the tensioner as necessary. Does the engine still overheat? | -- | System OK | |
12 | Check for an obstructed radiator air flow or bent fins. Are any radiator fins bent or is air flow to the radiator being obstructed? | -- | ||
13 | Check for a blockage in the cooling system passages. Are the cooling system passages blocked? | -- | ||
14 | Remove or relocate add on parts that block air flow to the radiator. Does the engine still overheat? | -- | System OK | |
15 |
Does the engine still overheat? | -- | System OK | |
16 | Check for an inoperative cooling fan. cooling fans inoperative? | -- | ||
17 | Repair or replace the cooling fan as necessary. Does the engine still overheat? | -- | System OK | |
18 | Check to see if the thermostat is stuck in the closed position. Is the thermostat sticking (or stuck) in the closed position? | -- | ||
19 | Replace the thermostat. Refer to Engine Coolant Thermostat Replacement . Does the engine still overheat? | -- | System OK | |
20 | Check for a faulty water pump. Is the water pump faulty? | -- | -- | |
21 | Replace the water pump. Refer to Water Pump Replacement . Does the engine still overheat? | -- | -- | System OK |
