1. Coolant drain
1. Engine coolant drain
Warning
- Do not loosen the radiator cap or reserve tank cap when coolant is hot, as doing so may result in burns caused by the release of steam or hot water.
- When opening the radiator cap, cover the cap with a thick cloth once the engine coolant has cooled and slowly turn to release pressure.
1) Remove the radiator cap from the radiator.
2) Loosen the radiator drain plug, and drain the coolant into a pan.
3) Loosen the drain plug on the cylinder block, and drain the coolant to a pan.
Legend
- Drain plug
4) Apply LOCTITE 262 or equivalent to the threaded portion of the cylinder block side drain plug.
5) Tighten the drain plug on the cylinder block.
Tightening torque: 21.6 N・m { 2.2 kgf・m / 16 lb・ft }
6) Tighten the radiator drain plug.
2. Engine coolant passage cleaning
1) Replenish the radiator with tap water.
Note
- Fill with tap water to the brim of the radiator cap inlet.
2) While pressing the radiator upper hose manually several times to bleed the air from the hose, fill the radiator with tap water.
Note
- Fill with tap water up to the brim of the radiator cap inlet with the amount the water lowers.
Caution
- Repeat the operation until the coolant level no longer drops.
3) Install the radiator cap to the radiator.
4) Add tap water up to the MAX line of the radiator reserve tank.
Legend
- Radiator reserve tank
- MAX line
- MIN line
5) Start and idle the engine for 20 minutes or more.
6) Stop the engine.
7) Remove the radiator cap from the radiator.
Warning
- Do not loosen the radiator cap or reserve tank cap when the tap water is hot, as doing so may result in burns caused by the release of steam or hot water.
- When opening the radiator cap, cover the cap with a thick cloth once the tap water has cooled and slowly turn to release pressure.
8) Loosen the radiator drain plug, and drain the tap water into a pan.
9) Loosen the drain plug on the cylinder block and drain the tap water into a pan.
Legend
- Drain plug
10) Apply LOCTITE 262 or equivalent to the threaded portion of the cylinder block side drain plug.
11) Tighten the drain plug on the cylinder block.
Tightening torque: 21.6 N・m { 2.2 kgf・m / 16 lb・ft }
12) Tighten the radiator drain plug.
2. Coolant filling
1) Fill with engine coolant up to the radiator filler neck.
Note
- Fill with engine coolant of the specified concentration to the brim of the radiator cap inlet.
Caution
- Fill slowly to prevent air from entering the system.
2) While pressing the radiator upper hose manually several times to bleed the air from the hose, fill the radiator with engine coolant.
Note
- Fill with engine coolant up to the brim of the radiator cap inlet with the amount the engine coolant lowers.
Caution
- Repeat the operation until the coolant level no longer drops.
3) Add engine coolant up to the MAX line of the radiator reserve tank.
Legend
- Radiator reserve tank
- MAX line
- MIN line
4) Install the radiator cap to the radiator.
5) Start and idle the engine.
Caution
- Idle the engine for 5 minutes or more.
6) Stop the engine.
7) Remove the radiator cap from the radiator.
Warning
- Do not loosen the radiator cap or reserve tank cap when coolant is hot, as doing so may result in burns caused by the release of steam or hot water.
- When opening the radiator cap, cover the cap with a thick cloth once the engine coolant has cooled and slowly turn to release pressure.
8) Fill with engine coolant up to the radiator filler neck.
Note
- If the engine coolant is excessively low, inspect for engine coolant leakage from the cooling system.
9) Install the radiator cap to the radiator.
10) Start the engine.
11) Increase the engine speed to around 2000 rpm and run the engine for 10 minutes once the engine coolant temperature gauge reaches the center.
12) With the engine running, check that the thermostat valve is open.
Note
- Touch the radiator upper hose, and confirm that it has become warm.
- If it has not become warm, go back to Step 11.
Caution
- Do not try determining it by using only an engine coolant temperature gauge.
13) Idle the engine for 5 minutes.
14) Stop the engine.
15) Remove the radiator cap from the radiator.
Warning
- Do not loosen the radiator cap or reserve tank cap when coolant is hot, as doing so may result in burns caused by the release of steam or hot water.
- When opening the radiator cap, cover the cap with a thick cloth once the engine coolant has cooled and slowly turn to release pressure.
16) Fill with engine coolant up to the radiator filler neck.
Note
- Fill with engine coolant of the specified concentration to the brim of the radiator cap inlet.
17) Add engine coolant up to the MAX line of the radiator reserve tank.
18) Install the radiator cap to the radiator.
19) Repeat steps 10 to 18 until the coolant level no longer lowers.
Caution
- If the level of the radiator reserve tank has fallen the next morning, add up to the MAX line.