For 1990-2009 cars

Step | Action | Value | Yes | No
--- | --- | --- | --- | ---
1 | Check for an incorrect or faulty radiator filler cap. Refer to Radiator Cap Was an incorrect cap installed, or is the cap faulty? | -- | Go to Step 2 | Go to Step 3
2 | Replace the filler cap. Is there still a coolant loss? | 103 kPa (15 psi) | Go to Step 3 | System OK
3 | Check for a leaking coolant recovery reservoir or reservoir hose. Is the coolant recovery reservoir leaking, or is the reservoir hose leaking? | -- | Go to Step 4 | Go to Step 5
4 | Replace the reservoir or the hose. Refer to Coolant Recovery Reservoir Replacement Is there still a loss of coolant? | -- | Go to Step 5 | System OK
5 | Check for any loose or damaged radiator hoses and connections. Are any radiator hoses loose or damaged? | -- | Go to Step 6 | Go to Step 7
6 | Re-seat the hoses and clamps. If necessary, replace the hoses and the clamps.

1. 3400 engine, refer to Radiator Hose Replacement or Radiator Hose Replacement

Is there still a coolant loss?

--

Go to Step 7

System OK

7 | Check for a water pump gasket leak. Is there a leak at the water pump gasket? | -- | Go to Step 8 | Go to Step 9
8 | Replace the coolant pump gasket.

1. 3400 engine, refer to Water Pump Replacement

Is there still a coolant loss?

--

Go to Step 9

System OK

9 | Check for a seal leak at the water pump. Is there a leak at the water pump seal? | -- | Go to Step 10 | Go to Step 11
10 | Replace the water pump.

1. 3400 engine, refer to Water Pump Replacement

Is there still a coolant loss?

--

Go to Step 11

System OK

11 | Check if the cylinder head bolts are tightened to specification.

• | Refer to Fastener Tightening Specifications in Engine Mechanical.

Are the cylinder head bolts tightened to the proper specification?

--

Go to Step 13

Go to Step 12

12 | Tighten the cylinder head bolts to the proper specification. If necessary, replace the cylinder head gasket. Is there still a coolant loss? | -- | Go to Step 13 | System OK
13 | Check for any coolant leaks at the radiator. Refer to Radiator Leak Testing Does the radiator have any leaks? | -- | Go to Step 14 | Go to Step 15
14 |

1. Inspect the radiator.
2. Replace the radiator as necessary. Refer to Radiator Replacement

Is there still a coolant loss?

--

Go to Step 15

System OK

15 |

1. Check the following for leaks:

• | The intake manifold

• | The engine block coolant drain hole plug

• | The heater core

Are any leaks occurring at any of these places?

--

Go to Step 16

System OK

16 | Make the necessary repairs or replace the components as necessary in order to repair the leak. Is there still a coolant loss? | -- | -- | System OK