Part 2
Cooling System Flushing - With Oil Contamination
NOTICE: Use this procedure only if the cooling system is contaminated with engine oil. If the cooling system is contaminated with any material other than oil, carry out the Cooling System Flushing - Without Oil Contamination procedure. Refer to Cooling System Flushing - Without Oil Contamination .
NOTE: For the coolant flow diagrams, refer to Engine Cooling Engine Cooling in the Description and Operation.
44. Repeat steps 29 through 43 an additional 3 times.
NOTICE: After filling the engine with Motorcraft(R) Engine Cooling System Iron Cleaner, carry out the remaining steps of the procedure within 24 hours. Failure to follow these instructions may damage the engine or cooling system.
45. NOTE: The quick connect coupling illustrated is to show the spring clip release location only. The quick connect coupling on the hose may differ.
Pull the upper radiator hose spring clip up until the end of the clip is in the detent on the quick connect coupling, disconnect the upper radiator hose quick-connect coupling from the coolant outlet connection and add 1.89L (2 qt) of Motorcraft(R) Engine Cooling System Iron Cleaner to the engine via the coolant outlet connection opening.
- Connect the upper radiator hose when finished.
- To install, push the spring clip in place and connect the upper radiator hose quick connect coupling, making sure the coupling is secure.
46. Fill the cooling system with hot water.
1. Fill the degas bottle to the maximum fill line.
2. NOTE: The degas bottle cap must be loose so that the cooling system does not get pressurized.
Install the degas bottle cap until it starts to ratchet. Back the degas bottle cap off one-half turn.
3. Start and idle the engine until the coolant level stabilizes.
4. If the coolant level drops below the minimum fill line refill the degas bottle to the maximum fill line.
- Install the degas bottle cap until it starts to ratchet. Back the degas bottle cap off one-half turn.
5. Run the engine at 2,000 rpm for 2 minutes.
6. Bring the engine to an idle.
7. If the coolant level drops below the minimum fill line refill the degas bottle to the maximum fill line.
- Install the degas bottle cap until it starts to ratchet. Back the degas bottle cap off one-half turn.
8. Repeat Steps 5 through 7 until the coolant level stabilizes. Shut the engine off.
9. Fill the degas bottle to 20 mm (0.787 in) above the maximum fill line. Install the degas bottle cap.
47. Select the maximum heater temperature and blower motor speed settings.
48. Start the engine.
49. Using a scan tool, select active command and set the cooling fan to ON.
50. NOTICE: Failure to run the engine at 2,000 rpm for 1 hour will result in insufficient cleaning of the cooling system.
Using a scan tool, select active command and set the engine rpm to 2,000 and run the engine for 1 hour.
51. Return the engine to idle speed, shut the engine off and allow the engine to cool.
52. 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.
Release the pressure in the cooling system by slowly turning the pressure relief cap 1/2 turn counterclockwise. When the pressure is released, remove the pressure relief cap.
53. Using a suitable suction device, siphon all contents and contaminants from the degas bottle.
54. Open the radiator draincock and drain the cooling system. Leave the radiator draincock open.
55. Release the clamp, disconnect the engine-to-oil cooler hose from the oil cooler and drain the LH side of the cylinder block.
56. Remove the starter.
57. Remove the RH cylinder block drain plug and drain the RH side of the cylinder block.
58. NOTE: The quick connect coupling illustrated is to show the spring clip release location only. The quick connect coupling on the hose may differ.
Pull the lower radiator hose spring clip up until the end of the clip is in the detent on the quick connect coupling and disconnect the lower radiator hose quick-connect coupling at the mid-point between the radiator tank and the engine, and drain all the contaminants from the lower radiator hose.
- Connect the lower radiator hose quick-connect coupling when finished.
- To install, push the spring clip in place and connect the lower radiator hose quick connect coupling, making sure the coupling is secure.
59. Close the radiator draincock.
60. Install the RH cylinder block drain plug.
- Tighten to 60 Nm (44 lb-ft).
61. Connect the engine-to-engine oil cooler hose to the engine oil cooler and position the clamp.
62. Remove the Air Cleaner (ACL) and the ACL (Air Cleaner) outlet tube.
63. Release the clamp and disconnect the heater return hose from the lower radiator hose.
64. Using a coupling adapter and 2 hose clamps, connect the fabricated fresh water supply hose to the heater return hose.
65. Route the fabricated drain hose from under the vehicle and, using a hose clamp, connect the fabricated drain hose to the lower radiator hose.
66. Using hose pinch pliers, clamp the engine oil cooler return hose and the lower radiator hose between the mid-point quick connect coupling and the engine.
67. Remove the degas bottle. For additional information, refer to Degas Bottle .
68. Clean the degas bottle in a solvent tank.
69. Install the degas bottle. For additional information, refer to Degas Bottle .
70. Install the pressure relief cap.
71. NOTICE: Failure to flush all the Motorcraft(R) Engine Cooling System Iron Cleaner from the cooling system will result in shortened coolant protection against corrosion of the cooling system.
Turn on the fresh water supply and allow the water to flush the heater core and radiator system until the drain water is free of foam, bubbles or discoloration.
72. While the water is flushing the heater core and radiator system, use a clear, clean approximately 1 L (1 qt) container to collect some of the drain water and verify the drain water is free of foam, bubbles or discoloration.
73. If the drain water in step 72 shows signs of foam, bubbles or discoloration, continue to flush the heater core and radiator system with fresh water and repeat step 72 until the drain water is free of foam, bubbles or discoloration.
74. Turn off the fresh water supply.
75. Open the radiator draincock and drain the cooling system. Use a clear, clean, approximately 1 L (1 qt) container to verify the drain water is free of foam, bubbles or discoloration.
- Close the radiator draincock when finished.
76. If any of the drain water in step 75 shows signs of foam, bubbles or discoloration, repeat steps 71 through 75.
77. Using hose pinch pliers, clamp the upper radiator hose.
78. Release the clamp and disconnect the engine-to-engine oil cooler hose from the engine oil cooler and drain the LH side of the cylinder block.
79. Turn on the fresh water supply and allow the water to flush the LH side of the cylinder block until the water is free of foam, bubbles or discoloration.
80. While the water is flushing the engine, use a clear, clean approximately 1 L (1 qt) container to collect some of the drain water and verify the drain water is free of foam, bubbles or discoloration.
81. If the drain water in step 80 shows signs of foam, bubbles or discoloration, continue to flush the engine with fresh water and repeat step 80 until the drain water is free of foam, bubbles or discoloration.
82. Turn off the fresh water supply and allow the LH side of the engine block to drain.
83. Connect the engine-to-engine oil cooler hose and position the clamp.
84. Remove the RH cylinder block drain plug and drain the RH side of the cylinder block.
85. Turn on the fresh water supply and allow the water to flush the RH side of the cylinder block until the drain water is free of foam, bubbles or discoloration.
86. While the water is flushing the engine, use a clear, clean approximately 1 L (1 qt) container to collect some of the drain water and verify the drain water is free of foam, bubbles or discoloration.
87. If the drain water in step 86 shows signs of foam, bubbles or discoloration, continue to flush the engine with fresh water and repeat step 86 until the drain water is free of foam, bubbles or discoloration.