MAINTENANCE NR Series COOLANT(for Engine Coolant) REPLACEMENT
CAUTION / NOTICE / HINT
- CAUTION:
-
-
Do not remove the reserve tank cap, air release valve or radiator drain cock plug while the engine and radiator assembly are still hot. Pressurized, hot engine coolant and steam may be released and cause serious burns.
PROCEDURE
1.DRAIN ENGINE COOLANT
- CAUTION:
-
Do not remove the reserve tank cap, air release valve or radiator drain cock plug while the engine and radiator assembly are still hot. Pressurized, hot engine coolant and steam may be released and cause serious burns.
Remove the 3 clips and bolt.
Pull down the No. 1 engine under cover assembly.
- NOTICE:
-
Do not damage the No. 1 engine under cover assembly.
| *a | Hose |
Connect a hose with an inside diameter of 9 mm (0.354 in.) to the radiator drain cock as shown in the illustration.
Loosen the radiator drain cock plug.
| *1 | Radiator Drain Cock Plug | *2 | Reserve Tank Cap |
| *3 | Air Drain Cock Plug | - | - |
| *a | Air Release Valve | - | - |
Remove the reserve tank cap. Then drain the engine coolant.
- HINT:
-
Collect the engine coolant in a container and dispose of it according to the regulations in your area.
Tighten the radiator drain cock plug by hand.
Disconnect the hose from the radiator drain cock.
Install the 3 clips.
Install the bolt.
- Torque:
- 7.5 N*m (76 kgf*cm, 66 in.*lbf)
2.ADD ENGINE COOLANT
| *a | Air Release Valve |
Using a 6 mm hexagon socket wrench, remove the air release valve from the radiator reserve tank assembly.
| *1 | Air Drain Cock Plug |
| *a | Hose |
| *b | Container |
Connect a hose with an inside diameter of 7 mm (0.276 in.) to the air drain cock as shown in the illustration.
- HINT:
-
Use a container to catch the draining engine coolant.
Loosen the air drain cock plug.
Add engine coolant to the radiator reserve tank assembly until engine coolant overflows from the air drain cock hole. Then tighten the air drain cock plug.
- Torque:
- 1.0 N*m (10 kgf*cm, 9 in.*lbf)
Squeeze the No. 1 radiator hose and No. 2 radiator hose several times by hand, and then check the level of the engine coolant.
If the engine coolant level is below the LOW line, add engine coolant.
Add engine coolant to the level shown in the illustration.
- Standard Capacity:
6.0 liters (6.3 US qts, 5.3 Imp. qts)
- NOTICE:
-
Do not substitute plain water for engine coolant.
- HINT:
-
TOYOTA vehicles are filled with TOYOTA SLLC at the factory. In order to avoid damaging the engine cooling system and other technical problems, only use TOYOTA SLLC or similar high quality ethylene glycol based non-silicate, non-amine, non-nitrite, non-borate coolant with long-life hybrid organic acid technology (coolant with long-life hybrid organic acid technology is a combination of low phosphates and organic acids).
Using a 6 mm hexagon socket wrench, install the air release valve to the radiator reserve tank assembly.
- Torque:
- 2.0 N*m (20 kgf*cm, 18 in.*lbf)
Install the reserve tank cap.
- NOTICE:
-
Securely tighten the reserve tank cap as much as possible.
Bleed air from the cooling system.
- NOTICE:
- ·
Before starting the engine, turn the A/C switch off.
·Adjust the heater control to the maximum hot setting.
·Adjust the blower speed to the low setting.
Warm up the engine until the thermostat opens. While the thermostat is open, circulate the engine coolant for several minutes.
- HINT:
-
The thermostat open timing can be confirmed by squeezing the No. 2 radiator hose by hand, and sensing vibrations when the engine coolant starts to flow inside the No. 2 radiator hose.
After the engine has warmed up, run the engine using the following cycle for at least 7 minutes: at 3000 rpm for 5 seconds, at idle speed for 45 seconds. (Repeat this cycle at least 8 times.)
Squeeze the No. 1 radiator hose and No. 2 radiator hose several times by hand to bleed air from the system.
- CAUTION:
- ·
Wear protective gloves.
·Be careful as the No. 1 radiator hose and No. 2 radiator hose are hot.
·Keep your hands away from the fan LH and fan RH.
- NOTICE:
- ·
If the coolant temperature gauge indicates an excessive temperature, turn off the engine and let it cool.
·Make sure that the radiator reserve tank assembly still has some engine coolant in it.
·If the radiator reserve tank assembly does not have enough engine coolant, the engine may overheat or be seriously damaged.
·If the radiator reserve tank assembly does not have enough engine coolant, perform the following: 1) stop the engine, 2) wait until the engine coolant has cooled down, and 3) add engine coolant until the radiator reserve tank assembly is filled to the FULL line.
- HINT:
-
If the flowing sound of engine coolant can still be heard after bleeding air, perform the following procedure to bleed air again.
- 1.
Warm up the engine. (With the engine idling, check that the engine coolant is flowing into the radiator reserve tank assembly.)
2.Run the engine at 2000 rpm for 2 minutes or more. (A)
3.Leave the engine idling for 2 minutes or more. (B)
4.Repeat steps (A) and (B) 4 times or more.
| *a | FULL Line |
| *b | LOW Line |
After the engine has cooled down, check that the engine coolant level is between the FULL and LOW lines.
- NOTICE:
-
The coolant levels in the compartments inside the radiator reserve tank assembly may differ, but this is not a malfunction.
If the engine coolant level is below the LOW line, add engine coolant to the FULL line.
3.INSPECT FOR COOLANT LEAK