How To Bleed The Cooling System On A Mitsubishi Pajero! Tip Video. #Mitsubishi #howto #tutorial #car, by TheServiceLightGuy on YouTube. 1 min 7 s.
- Video length
- 1 min 7 s
- Time to do it
- 30 minutes
- Difficulty
- Medium
- Steps
- 10
What you need
Steps
Park the Pajero on level ground and let the engine cool completely. Never open the radiator cap or bleed screw on a hot engine.
Open the radiator cap and check the coolant level. Top up with the correct premixed coolant if it sits below the neck.
Find the bleed screw on the highest point of the cooling system, usually on the thermostat housing or heater hose.
Fill the radiator slowly with coolant through a funnel. Pouring slowly stops new air bubbles from forming.
Loosen the bleed screw a couple of turns with a spanner. Coolant and trapped air will start to escape.
Keep topping up the radiator as the level drops. Watch the bleed screw until a steady stream of coolant with no bubbles comes out.
Tighten the bleed screw gently. Do not overtighten it, or you can damage the housing or strip the thread.
Start the engine and let it idle with the heater set to full hot. Squeeze the top radiator hose a few times to push air toward the bleed point.
Open the bleed screw again briefly until bubble-free coolant flows, then close it. Top up the radiator and fit the cap.
Run the engine until the cooling fan cycles, then let it cool and recheck the level. Top up as needed.
Tips and common mistakes
Always work on a cold engine, since hot coolant can scald you under pressure.
Use only the coolant type specified for your Pajero and mix it with water as the label says.
Check the level again after a few drives, as trapped air can settle and drop the level.
Dispose of old coolant at a recycling centre, since it is toxic to pets and wildlife.
Questions
How do I know all the air is out?
You will see a steady stream of coolant with no bubbles at the bleed screw, and the heater should blow hot at idle. Recheck the level after the engine cools.
Can I bleed the system without a bleed screw?
Yes. Run the engine with the radiator cap off and the heater on hot until the thermostat opens, topping up as bubbles escape. Then fit the cap.
Why does my Pajero still overheat after bleeding?
Air may still be trapped, or you could have a leak, a stuck thermostat or a failed water pump. Pressure-test the system if the problem continues.
This guide was drafted from the video's details and general task knowledge. It has not been checked against the full video. Check the video and relevant product instructions before following a procedure. Report a correction.
