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HOMESERVICE MANUALSISUZU2006ASCENDER S, 5.3 M, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 241 (ENGINE COOLING SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESENGINE FAILS TO REACH NORMAL OPERATING TEMPERATURE
2006 Isuzu Ascender S, 5.3 M, 4WD

Engine Fails To Reach Normal Operating Temperature

2006 Isuzu Ascender S, 5.3 M, 4WDSECTION Engine Fails To Reach Normal Operating Temperature
WARNING: This page is about a different car, the 2007 Isuzu Ascender, 2007 GMC Envoy, 2007 Chevrolet TrailBlazer, and 2007 Buick Rainier. However, it is still accessible from the selected car via links, so may be relevant.
Engine Fails To Reach Normal Operating Temperature

Step Action Yes No
1 Did you review the Symptoms-Engine Cooling Diagnosis information and perform the necessary inspections? Go to Step 2  Go to Symptoms - Engine Cooling 
2 Verify that the engine does not reach normal operating temperature.
Does the engine reach normal operating temperature?		 System OK Go to Step 3 
3 Inspect the coolant level.
Is the coolant level below the add mark?		 Go to Step 4  Go to Step 5 
4
  1. Add coolant as necessary. Refer to Draining and Filling Cooling System (LH6, LS2)  or Draining and Filling Cooling System (LL8) .
  2. Perform a cooling system pressure test.
Is the repair complete?		 System OK Go to Step 5 
5 Inspect for a stuck open, missing or wrong type of thermostat. Refer to Thermostat Diagnosis .
Is the thermostat operating properly?		 System OK Go to Step 6 
6 Install the correct replacement thermostat. Refer to Thermostat Replacement (4.2L Engine)  or Thermostat Replacement (5.3L and 6.0L Engines) .
Is the repair complete?		 System OK Go to Step 7 
7 Run the engine in order to verify the repair.
Does the engine fail to reach normal operating temperature?		 Go to Step 1  System OK
RENDER: 1.0x

NO RELATED

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Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.