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Just changed the coolant temp sensor on my mates car (1.2 12v) so here's a little guide as to how I did it:
First take off the engine cover
Then locate the Coolant Temp Sensor:
Here it is highlighted:
Then take off the horseshoe clip using a screwdriver, if you take it off gently and no sudden movements it shouldn't break.
Then gently pull out the sensor, it will still be attached to the plug:
Put a bucket or a drip tray underneath your car as coolant will come out, only a small amount, its not worth draining some so long as the tray is in place and you have some old rags.
You will notice that there is no rubber o-ring on this plug so gently prize it out and be careful not to drop it in the engine bay, here is the part:
As my mate bought a 4 pin sensor instead of a 2 pin, we just cleaned it up using a rag, this is fine atm but he has the new part on order so I will add to this thread if any of you require more detail:
Then plug the sensor back in to the plug and gently but firmly push it back into its housing, ensuring there is no dirt:
After ensuring it is seated correctly and all the way in, re-attach the horseshoe clip and you should here a click, meaning that it is attached again, then ensure that the clip is attached an the plug is secure.
Re-attach the engine cover ensuring you replace any disconnected pipes:
Next check your coolant level, it will probably have dropped below the minimum mark, so top up to half way between. Then you need to go on a short drive to allow the engine to put back in the coolant that it lost, after the drive the coolant was lower again, so adding a little more coolant and monitoring has sufficed.
The trick with the horseshoe clip is to be gentle and it wont break and make sure you don't lose it in the engine bay
Hope this helps and apology's for the rubbish pics, my mate took them on an iphone so they ain't the best, but you get the jist.
First take off the engine cover
Then locate the Coolant Temp Sensor:
Here it is highlighted:
Then take off the horseshoe clip using a screwdriver, if you take it off gently and no sudden movements it shouldn't break.
Then gently pull out the sensor, it will still be attached to the plug:
Put a bucket or a drip tray underneath your car as coolant will come out, only a small amount, its not worth draining some so long as the tray is in place and you have some old rags.
You will notice that there is no rubber o-ring on this plug so gently prize it out and be careful not to drop it in the engine bay, here is the part:
As my mate bought a 4 pin sensor instead of a 2 pin, we just cleaned it up using a rag, this is fine atm but he has the new part on order so I will add to this thread if any of you require more detail:
Then plug the sensor back in to the plug and gently but firmly push it back into its housing, ensuring there is no dirt:
After ensuring it is seated correctly and all the way in, re-attach the horseshoe clip and you should here a click, meaning that it is attached again, then ensure that the clip is attached an the plug is secure.
Re-attach the engine cover ensuring you replace any disconnected pipes:
Next check your coolant level, it will probably have dropped below the minimum mark, so top up to half way between. Then you need to go on a short drive to allow the engine to put back in the coolant that it lost, after the drive the coolant was lower again, so adding a little more coolant and monitoring has sufficed.
The trick with the horseshoe clip is to be gentle and it wont break and make sure you don't lose it in the engine bay
Hope this helps and apology's for the rubbish pics, my mate took them on an iphone so they ain't the best, but you get the jist.
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