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All pictures and texts in this web page are the property of nomaallim.com. Any use of any part of those contents without the written consent of nomaallim.com shall be subject to legal procedures as per international and local laws in the concerned country. Using the name "nomaallim" or "nomaallim com" or "nomaallim.com" in the text describing the unauthorized copied content shall not constitute an exception and shall be sanctioned in accordance to the effective laws and proceedings.
BEFORE YOU START
DISCLAIMER:
Our pictorials are of informative nature and do illustrate works carried out by ourselves at our own premises for our own use and satisfaction. Readers who envisage to carry out similar works inspired by the below method shall do this at their own risks and liability. |
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NOTE: this tutorial is valid for the following Mitsubishi, Peugeot and Citroën models, all equipped with the same Mitsubishi MIVEC 4B11 engine:
- Mitsubishi Lancer
- Mitsubishi ASX (depending on model-year)
- Mitsubishi Outlander
- Mitsubishi Outlander Sport (depending on model-year)
- Peugeot 4007
- Citroën C4 Aircross
Why and when to replace coolant?
Coolant is a mixture of distilled water and glycol with additives, it is used in a closed loop circuit within the engine of you car and more recently, widely used in EV's for electric motor cooling and battery thermal management.
With time, liquids within closed circuits tend to become acidic or contain solid particules with a slight abrasive effect, or simply get contaminated with oil and lose part of their efficiency due to molecule degradation, etc.
For this reason most automakers would recommend replacing the coolant every 5 years or so; make sure of the recommended frequency within your vehicle's manual.
Or else, many repairs will force you to drain the coolant, thus the need to refill the circuit and bleed it.
This tutorial shows how to bleed the coolant in a non-pressurized system (Mitsubishi Lancer EX), i.e. a cooling circuit which expansion tank is not pressurized, rather a simple reservoir for topping up coolant in the circuit to compensate for normal evaporation and leaks.
You may click on the below link for pressurized systems, shown on Peugeot vehicles.
With time, liquids within closed circuits tend to become acidic or contain solid particules with a slight abrasive effect, or simply get contaminated with oil and lose part of their efficiency due to molecule degradation, etc.
For this reason most automakers would recommend replacing the coolant every 5 years or so; make sure of the recommended frequency within your vehicle's manual.
Or else, many repairs will force you to drain the coolant, thus the need to refill the circuit and bleed it.
This tutorial shows how to bleed the coolant in a non-pressurized system (Mitsubishi Lancer EX), i.e. a cooling circuit which expansion tank is not pressurized, rather a simple reservoir for topping up coolant in the circuit to compensate for normal evaporation and leaks.
You may click on the below link for pressurized systems, shown on Peugeot vehicles.
How to replace the coolant on the Mitsubishi Lancer and other models
The coolant drain procedure is the same for all gasoline and diesel vehicles.
This must be done on a cold engine, of course!
Find the coolant drain plug and take it off with your hand by simply unscrewing it.
It is located at a bottom corner of the radiator, on the right side in the case of the Mitsubishi Lancer.
You need to remove the holding clips of the bottom plastic cover that closes the bumper from underneath to access the drain plug.
Also, remove the radiator cap to speed up the draining process, make sure however to use a plastic bucket underneath the coolant plug and to collect the coolant in it as you need to check for the presence of oil in your coolant, which denotes a potential problem like for example a head-gasket failure.
This must be done on a cold engine, of course!
Find the coolant drain plug and take it off with your hand by simply unscrewing it.
It is located at a bottom corner of the radiator, on the right side in the case of the Mitsubishi Lancer.
You need to remove the holding clips of the bottom plastic cover that closes the bumper from underneath to access the drain plug.
Also, remove the radiator cap to speed up the draining process, make sure however to use a plastic bucket underneath the coolant plug and to collect the coolant in it as you need to check for the presence of oil in your coolant, which denotes a potential problem like for example a head-gasket failure.
Now proceed with some preparatory works prior to refilling with coolant in your Mitsubishi, as follows.
Wash well the coolant reservoir, check its hose and replace it if needed.
Use general detergent soap in a bucket to soak the reservoir then clean it with a hard brush.
Wash well the coolant reservoir, check its hose and replace it if needed.
Use general detergent soap in a bucket to soak the reservoir then clean it with a hard brush.
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Radiator flushing (optional but recommended)
Replug the radiator and use any radiator flush product to clean the circuit.
Simply pour the contents of the bottle in the radiator and fill with tap water for now.
Turn on the cabin heater, start the engine and rev it up to let the water pump circulate the product in the closed circuit. Do so for a few minutes and after making sure that the engine becomes warm enough for the thermostat to open. Turn off the engine, wait for half an hour then drain the coolant circuit again.
Simply pour the contents of the bottle in the radiator and fill with tap water for now.
Turn on the cabin heater, start the engine and rev it up to let the water pump circulate the product in the closed circuit. Do so for a few minutes and after making sure that the engine becomes warm enough for the thermostat to open. Turn off the engine, wait for half an hour then drain the coolant circuit again.
Coolant refill and bleeding
Use a funnel to refill coolant until the level reaches the bottom of the radiator cap, start the engine, wait until the thermostat opens (keep the cabin heater on all the time during this operation), and keep adding coolant as long as it takes for keeping the level to the max.
Turn off the engine, fill the coolant reservoir below the "max" level, raise it as shown for a minute, then put it in its place, bolt it and adjust the coolant level to the "max" mark.
That's it, always check the coolant level the next day of such an intervention and prior to starting your engine.
Adjust the level in the reservoir if necessary.
That's it, always check the coolant level the next day of such an intervention and prior to starting your engine.
Adjust the level in the reservoir if necessary.
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