For 1990-2009 cars

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 |

1. Check for an external coolant leak.
2. Do a pressure or dye test on the cooling system. Refer to Cooling System Leak Testing .

Is the cooling system to the proper pressure?

--

Go to Step 2

Go to Step 3

2 |

1. Check for an internal coolant leak.
2. Perform a cylinder leak test. Refer to Oil Leak Diagnosis -2.4L or Oil Leak Diagnosis -3.4L in Engine Mechanical.

Is there an internal loss of coolant?

--

Go to Step 3

--

3 | Repair the cooling system components as necessary. Is there still a loss of coolant? | -- | -- | System OK