Inspect the radiator.

Is the radiator leaking?

Go to Step 2

Go to Step 3

Repair the radiator as necessary.

Is a loss of coolant still evident?

Go to Step 3

System OK

Inspect the surge tank cap.

Is the surge tank cap faulty?

Go to Step 4

Go to Step 5

1. Perform a surge tank cap pressure test.
2. Replace the cap if necessary.

Is a loss of coolant still evident?

Go to Step 5

System OK

Inspect the following components:

Is the surge tank or the hoses leaking?

Go to Step 6

Go to Step 7

Replace the surge tank or the hoses.

Is a loss of coolant still evident?

Go to Step 7

System OK

Inspect the following components:

Is any damage evident?

Go to Step 8

Go to Step 9

Repair or replace the components as necessary in order to correct the leak.

Is a loss of coolant still evident?

Go to Step 9

System OK

Inspect the water pump seal.

Is the water pump seal leaking?

Go to Step 10

Go to Step 11

Replace the water pump.

Is a loss of coolant still evident?

Go to Step 11

System OK

Inspect the water pump sealing surface.

Is the water pump O-Ring or gaskets leaking?

Go to Step 12

Go to Step 13

Replace the O-Ring or gaskets.

Is a loss of coolant still evident?

--

System OK

Inspect the cylinder block, cylinder head and gasket surface.

Is the cylinder block, cylinder head or gasket leaking?

Go to Step 14

System OK

Repair or replace the components as necessary in order to correct the leak.

Is a loss of coolant still evident?

--

System OK