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Cooling System Bleeding & Flushing

What is Cooling System Bleeding & Flushing ?

it means to get the air and rust out of your cooling system ! 

When to do it  ?

 flushing : every 30000km 

bleeding  : whenever the car starts to overheat ( flushing is recommended too )  

Tools needed > 

12 mm wrench , 2 plastic bags ( will be used as covers ) , an extra person ( friend ) , fresh water ( if flushing ) , 5 Liters coolant ( if flushing ) .

Let's begin ! 

1. cover the marked places with any plastic sheets , bags ( starter , distributor )

2. turn on the car till it's fully heated  ( fan comes at least once ) 

3. turn off the car and wait for 5 min and then using a peace of cloth open the radiator cap really slowly so the pressure decreases slowly and the water won't go into your face , slowly open it and remove the cap ! 

FOR BLEEDING : 

1. prepare your 50/50 mixture .

2. ask  your friend start the car

3. using 12 mm wrench unscrew the bleeding screw shown in pic below ! ( be gentle don't break it ) 

4. coolant will flow out of the screw , you will notice coolant level drops in the radiator ,add immediately your mixture and don't allow air to enter . 

5. do it until you'll notice no bubbles coming out of the bleeding screw  !( may there wasn't in the first place ) 

6. screw back the bleeding screw 

7. Rev it high for a couple of times , and add coolant as necessary !

8. close radiator cap , turn off the engine ! 

FLUSHING THE SYSTEM ! 

1. prepare a garden hose or a fresh water source and prepare the coolant tank  

2. ask your friend start the car

3. using 12 mm wrench unscrew the bleeding screw shown in pic above ! ( be gentle don't break it ) 

4. coolant will flow out of the screw , you will notice coolant level drops in the radiator ,add immediately fresh water and don't allow air to enter . 

5. do it until you'll notice that clear water  coming out of the bleeding screw  ! ( to increase the bleed flow  ask your friend to keep it at 1500 rpm or higher .)

6. after the water is crystal clear begin adding the coolant , add your whole coolant tank ! leave some at the end ( 0.5 liters ) so you can add later )

7. screw back the bleeding screw without letting air to come into the cap .

8. Rev it high for a couple of times , and add coolant as necessary !

9. close radiator cap , turn off the engine !