Coolant: Service and Repair
ENGINE COOLANT
Changing Engine Coolant
WARNING:
Do not remove the radiator cap when the engine is hot. Serious burns could occur from high pressure coolant escaping from the radiator. Wrap a thick cloth around the cap. Slowly turn it a quarter turn to allow built-up pressure to escape. Carefully remove the cap by turning it all the way.
DRAINING ENGINE COOLANT
1.Open radiator drain plug (1) at the bottom of radiator and remove the radiator filler cap.
CAUTION:
Do not allow the coolant to contact the drive belt.
Revision: March 20122013 Infiniti JX
2.Remove water drain plug (A) and copper sealing washer (B).
CAUTION:
Do not reuse copper sealing washers.
3.For a complete cooling system drain, remove the reservoir tank and drain the coolant, and then clean the reservoir tank before installation.
CAUTION:
Do not allow the coolant to contact the drive belt.
4.When performing a complete cooling system drain, remove the water drain plug (B), connector bolt (C), and copper sealing washer (A) on the cylinder block.
CAUTION:
Do not reuse copper sealing washers.
NOTE:
- For Canada, water drain plug (B) is a block heater, not a drain plug.
- Remove water drain plug (D) and copper sealing washer (E)
during engine overhaul.
CAUTION:
Do not reuse copper sealing washers.
5.Check the drained coolant for contaminants such as rust, corrosion or discoloration.
- If contaminated, flush the engine cooling system. Refer to FLUSHING COOLING SYSTEM.
REFILLING ENGINE COOLANT
1.Install the radiator drain plug and the reservoir tank, (if removed).
2.Install the water drain plug (A) and copper sealing washer (B).
Tighten water drain plug to specification.
CAUTION:
Do not reuse copper sealing washers.
3.Install the cylinder block drain plugs (if removed).
- Apply sealant to the thread of the water drain plug (B), connector bolt (C) and water drain plug (D), (if removed).
CAUTION:
Do not reuse copper sealing washers.
NOTE:
- For Canada, water drain plug (B) in is a block heater, not a water drain plug.
- Install copper sealing washers (E) and (A), (if removed).
- Use Genuine High Performance Thread Sealant or equivalent. Refer to "Recommended Chemical Products and Sealants" Recommended Chemical Products and Sealants.
- Tighten each plug and connector bolt to specifications.
4.If disconnected, reattach the upper radiator hose at the engine side.
5.Set the vehicle heater controls to the full HOT and heater ON position. Turn the vehicle ignition ON with the engine OFF as necessary to activate the heater mode.
6.Install the Tool by installing the radiator cap adapter onto the radiator neck opening. Then attach the gauge body assembly with the refill tube and the Venturi assembly to the radiator cap adapter.
7.Insert the refill hose into the coolant mixture container that is placed at floor level. Make sure the ball valve is in the closed position.
-Use the specified coolant or equivalent.
8.Install an air hose to the Venturi assembly. The air pressure must be within specification.
CAUTION:
The compressed air supply must be equipped with an air dryer.
9.The vacuum gauge will begin to rise and there will be an audible hissing noise. During this process open the ball valve on the refill hose slightly. Rising coolant will be visible in the refill hose. After the refill hose is full of coolant, close the ball valve. This will purge air trapped in the refill hose.
Revision: March 20122013 Infiniti JX
10.Continue to draw the vacuum until the gauge reaches 28 inches of vacuum. The gauge may not reach 28 inches in high altitude locations. Refer to the following table for expected vacuum readings.
11.When the vacuum gauge has reached the specified amount, disconnect the air hose and wait 20 seconds to see if the system loses vacuum. If the vacuum level drops, perform necessary repairs to the system and repeat steps 6 - 8 to bring the vacuum to the specified amount. Recheck for leaks.
12.Place the coolant container (with the refill hose inserted) at the same level as the top of the radiator. Then open the ball valve on the refill hose so the coolant will be drawn up to fill the cooling system. The cooling system is full when the vacuum gauge reads zero.
CAUTION:
Do not allow the coolant container to get too low when filling to prevent air from being inadvertently drawn into the cooling system.
13.Remove the Tool from the radiator neck opening and install the radiator cap.
14.Fill the cooling system reservoir tank to the specified level. Run the engine to warm up the cooling system and top up the system as necessary.
FLUSHING COOLING SYSTEM
1.Fill the radiator from the filler neck above the radiator upper hose and reservoir tank with clean water and reinstall radiator filler cap.
2.Run the engine until it is at normal operating temperature.
3.Rev the engine two or three times under no-load.
4.Stop the engine and wait until it cools down.
5.Drain the water from the system. Refer to "Changing Engine Coolant" .
6.Repeat steps 1 through 5 until clear water begins to drain from the radiator.
Revision: March 20122013 Infiniti JX