INSPECTION PROCEDURE 2: Engine Overheating: Diagnosis

WARNING: This page is about a different car, the 2005 Dodge Stratus and 2005 Chrysler Sebring. However, it is still accessible from the selected car via links, so may be relevant.

STEP 1. Remove the radiator cap and check for coolant contamination.
Q: Is the coolant contaminated with rust and oil?

YES : Replace it. [Refer to Maintenance Service - ENGINE COOLANT (CHANGE) ]. Go to Step 6.

NO: There is no action to be taken. Go to Step 2.
STEP 2. Check radiator clog.
Q: Is the radiator clogged?

YES : Clean or replace the radiator. Go to Step 6.

NO: Go to Step 3.
STEP 3. Check the radiator cap valve opening pressure.
NOTE: Be sure that the cap is clean before testing, since rust or other foreign material on the cap seal will cause an improper reading.
1. Use a cap adapter to attach the cap to the tester.
2. Increase the pressure until the gauge indicator stops moving.
  Minimum limit: 83 kPa (12 psi)
  
  Standard value: 93 - 123 kPa (14 - 18 psi)
Q: Does the reading remain at or above the minimum limit?

YES : Go to Step 4.

NO: Replace the radiator cap. Go to Step 6.

Fig 1: Checking Radiator Cap Valve Opening Pressure
Courtesy of DAIMLERCHRYSLER CORPORATION
STEP 4. Check thermostat operation.
Refer to INSTALLATION SERVICE POINTS .

Q: Does the thermostat operating correctly?

YES : Go to Step 5. < 2.4L Engine > or go to Step 6. < 3.0L Engine >

NO: Replace the thermostat. Go to Step 6.
STEP 5. Check the drive belt for slippage or damage. < 2.4L Engine >
Refer to MAINTENANCE SERVICE - DRIVE BELTS (CHECK CONDITION) .

Q: Is the drive belt loose or damaged?

YES : Adjust or replace the drive belt. Go to Step 6.

NO: There is no action to be taken.
STEP 6. Retest the system.
Check the coolant temperature gauge.

Q: Is the coolant temperature abnormally high?

YES : Return to Step 3.

NO: This procedure is complete.