Introduction
After draining the coolant, remove the old thermostat, clean its location, and reinstall the new one. Finally, fill the cooling circuit with the appropriate liquid. Do not forget to expel the air from the circuit: this is the coolant purge.
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Collect the coolant in a container and dispose of it at a recycling center.
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For filling, you need about 5 liters of coolant.
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Locate the filler cap.
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Locate the thermostat and the hose connected to it.
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Undo the clamp holding the hose using the multi-grip pliers.
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Be careful not to damage the radiator located nearby.
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Pull back the collar, and remove the hose.
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If disassembly is difficult, rotate the hose on itself rather than pulling on it.
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Remove the 2 screws of 10.
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Remove the thermostat housing.
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Don't forget to remove the old gasket.
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To completely drain the cooling circuit, you must open the bleed screw located under your radiator on the driver's side.
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Place the new thermostat housing with its new gasket.
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Moderately tighten the 10 screws (aluminium casing, so do not "miss" the threads).
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By applying a little grease before reassembling the hose you will make the next disassembly easier.
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Reassemble the hose and its clamp.
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Open the 3 bleeders:
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On the heater hose (passenger side).
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On the thermostat housing ( Be careful, fragile screws, do not tighten too much! when closing ).
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On the top of the radiator, “quarter turn” tap.
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Fill with suitable liquid through the filler cap and close the bleeders one by one when they overflow and the water flows smoothly (sign that all the air bubbles have been expelled).
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Do not exceed the max level when filling.
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Drive for a few minutes (until the radiator fans start).
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Wait until the engine is cold (20 to 30 minutes).
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Top up the liquid to the max level.
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3 Comments
Good evening, well done tutorial. I just allow myself 2 remarks: 1) During the first warm-up, it is better in my opinion to run the engine at a fast idle (1500-2000 rpm) to avoid unfortunate over-revving while driving and especially to be able to cut just after the fan starts // 2) No grease to fit the hose (attacks the rubber), rather soap or LDR. Best regards, Xavier.
Hello Sabine. I am a 58 year old experienced DIYer and I find your tutorial very clear and precise. I really liked the chapters with their professional details, the 3 very good quality photos, the list of tools etc.. There really, you can't go wrong. I would just have liked to see a little more explanation on a bad purge and its consequences on the engine, maybe also see a useful link (like how to test the water thermostat before reassembling it).. .. Thank you for your work.. cordially René
In the technical review they say that you need a charging cylinder to do the purge, in practice it is complicated to have, a can cut upside down and PTFE sealing tape can replace it. They say that you need 0.5L minimum inside for the purge. Are these recommendations correct or is a purge only as indicated in the tutorial sufficient?
