Engine Overheating 3.5 V6 LX5
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 missing or damaged radiator upper baffle and/or center air deflector. Is the baffle or deflector missing or damaged? | -- | ||
2 | Check for a loss of coolant. Is there a loss of coolant? | -- | ||
3 | Fill the system to the specified level. Refer to Loss of Coolant . Does the engine overheat? | -- | System OK | |
4 | Check for low coolant protection. Refer to Coolant Concentration Testing . Is the coolant to the correct correction? | -- | ||
5 | Check for a loss of system pressure. Refer to Cooling System Leak Testing . Is there a loss of system pressure? | -- | ||
6 | Check for a faulty engine coolant temperature (ECT) sensor. Refer to Engine Coolant Temperature Sensor Replacement (3.5L Twin Cam V6 LX5). Is the sensor operating properly? | -- | ||
7 | Check for a cracked coolant recovery reservoir or a leaking hose. Refer to Loss of Coolant . Is the reservoir cracked or is the hose leaking? | -- | ||
8 | Repair or install new parts as necessary, then retest. Does the engine overheat? | -- | System OK | |
9 | Check for incorrect drive belt tension. Refer to Drive Belt Replacement in Engine Mechanical. Is the belt to the correct tension? | -- | ||
10 | Correct for damaged water pump driveshaft. Is the water pump driveshaft damaged or is the seal leaking? | -- | ||
11 | Check for obstructed radiator air flow or bent radiator fins. Is the radiator air flow obstructed? | -- | ||
12 | Check for blocked cooling system passages. Are the cooling system passages blocked? | -- | ||
13 | Check for improper direction or inoperative cooling fans. Refer to Engine Coolant Fan Motor Replacement . Are the cooling fans and the motors operating correctly? | -- | ||
14 | Check the thermostat. Refer to Thermostat Diagnosis . Is the thermostat stuck in the closed position? | -- | ||
15 | Replace the thermostat. Refer to Engine Coolant Thermostat Replacement . Does the engine overheat? | -- | System OK | |
16 | Check for faulty water pump. Refer to Water Pump Replacement . Are the impeller blades broken or eroded? | -- | ||
17 | Check the radiator cooling capacity. Is the proper sized radiator being used on the vehicle? | -- | ||
18 | Consult the current parts catalog. If necessary, replace the radiator. Refer to Radiator Replacement . Is the repair complete? | -- | System OK | -- |
Engine Overheating 3800 V6 L36
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? | -- | ||||||
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 in Engine Mechanical. 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 Powertrain Control Module Replacement/Programming in Engine Controls. 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 electric cooling fans as necessary. Refer to Cooling System Draining and Filling . 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. Refer to Engine Coolant Thermostat Replacement . Does the engine still overheat? | -- | System OK | |||||
23 | Check for a faulty coolant pump. Is the coolant pump faulty? | -- | ||||||
24 | Replace the water pump. Refer to Water Pump Replacement . Does the engine still overheat? | -- | System OK | |||||
25 | Check for an incorrect radiator. Is the radiator correct? | -- | System OK | |||||
26 | Install the correct radiator. Refer to Radiator Replacement . Does the engine still overheat? | -- | -- | System OK | ||||
