Loss of Coolant. Buick Roadmaster 1996

For 1990-2009 cars

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | Pressure test the cooling system. Refer to Cooling System Leak Testing . Make sure the heater core is also inspected. Is the cooling system leaking externally? | -- | Go to Step 2 | Go to Step 3
2 | Repair or replace components as necessary. | -- | -- | System OK
3 | Check the engine oil for signs of coolant contamination. Are there signs of coolant contamination in the engine oil? | -- | Go to Step 4 | Go to Step 6
4 | Inspect Engine Oil Cooler (if equipped) for internal leakage. Is the engine oil cooler leaking internally? | -- | Go to Step 5 | Go to Step 6
5 | Replace the radiator. Refer to Radiator Replacement . | -- | -- | System OK

6

Remove the cylinder heads. Refer to Cylinder Head Replacement in Engine Mechanical.

Inspect the cylinder heads, gaskets, and the engine block for cracks, leaks, and damage. Refer to Cylinder Head Cleaning and Inspection in Engine Mechanical.

Repair as necessary.

Is the repair complete?

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System OK