Inspection and Verification

Supercharger Cooling






Inspection and Verification

WARNING: Always allow the engine to cool before opening the cooling system. Do not unscrew the coolant pressure relief cap when the engine is operating or the cooling system is hot. The cooling system is under pressure; steam and hot liquid can come out forcefully when the cap is loosened slightly. Failure to follow these instructions may result in serious personal injury.

NOTICE: Check the coolant and engine oil levels. Top off the coolant level if needed. If there is engine coolant in the engine oil, the cause must be corrected and the oil changed or major component damage can occur.

NOTICE: The Supercharger (SC) cooling system is filled with Motorcraft Premium Gold Engine Coolant. Mixing coolant types degrades the corrosion protection of Motorcraft Premium Gold Engine Coolant.

1. Verify the customer's concern by operating the engine to duplicate the condition.

2. Inspect to determine if any of the following mechanical or electrical concerns apply.

Visual Inspection Chart:

3. If the inspection reveals an obvious concern that can be readily identified, repair it as necessary.

4. Inspect the coolant condition.

1. WARNING: Always allow the engine to cool before opening the cooling system. Do not unscrew the coolant pressure relief cap when the engine is operating or the cooling system is hot. The cooling system is under pressure; steam and hot liquid can come out forcefully when the cap is loosened slightly. Failure to follow these instructions may result in serious personal injury.

Allow the engine to cool. Once pressure is released, remove the pressure relief cap.

2. NOTICE: The Supercharger (SC) cooling system is filled with Motorcraft Premium Gold Engine Coolant. Mixing coolant types degrades the corrosion protection of Motorcraft Premium Gold Engine Coolant.

Inspect the coolant color:
- If Motorcraft Premium Gold Engine Coolant has a clear or pale yellow color, this indicates higher water content than required.

- A light or reddish brown color indicates that rust may be present in the cooling system. Flush the system and refill with the correct mixture of water and coolant.

3. If the coolant appearance is acceptable, test the coolant freezing point range with the Coolant/Battery Refractometer. The freezing point should be in the range -45°C (-50°F) to -23°C (-10°F). If the vehicle is driven in cold climates less than -36°C (-34°F), it may be necessary to increase the coolant concentration to get adequate freeze protection.
- Maximum coolant concentration is 60/40.

- Minimum coolant concentration is 40/60.

4. Check the coolant system conditions:
- If the coolant level is low, add the specified coolant mixture only.

- If the coolant tests weak, add straight coolant until the readings are within acceptable levels.

- If the coolant tests strong, remove some of the coolant and add water until readings are within acceptable levels.

5. If the concern remains after the inspection, determine the symptom(s). GO to Symptom Chart. Supercharger Cooling

6. Verify the cooling system is correctly filled and bled. Refer to Supercharger Cooling System Draining, Filling and Bleeding Supercharger Cooling.