Coolant level sensor replacement

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486
1.8 8v
Posts: 31
Joined: Thu May 10, 2018 9:49 am

Coolant level sensor replacement

Post by 486 » Sun Jan 27, 2019 12:26 pm

Hi. I have red light for coolant low level. The lamp turns off after 2-3km. I checked the coolant level, then replaced it with new and the light is still on for some minutes every day. I think the problem is in coolant level sensor and found another sensor (second hand). The question is how to replace it. Is there chance for coolant leakage when sensor is removed and the tank is full or its position is above coolant surface level and potential leakage will be insignificant?
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dirtydirtydiesel
3.0 24v
Posts: 1374
Joined: Sun Apr 28, 2013 11:02 pm
Location: Coalville, Leics.

Re: Coolant level sensor replacement

Post by dirtydirtydiesel » Sun Jan 27, 2019 8:38 pm

You just turn it anti-clockwise by 90° & lift it out,
First put some small bore rubber tubing in the header tank & siphon 500mls off (windscreen washer pipe is ideal)
2002 110 HDi estate, Rapier in monaco blue! ( found quite a bit more power :cheesy: )
1999 3.0 V6 SE coupe in Diablo Red ( my baby )
2006 206 1.4 16v sport in Aegean blue ( wife's shopping trolley :roll: )

pp2000 owner / user, can offer Diagnostic's / fault code, reading / clearing for beer tokens in Leicestershire.

486
1.8 8v
Posts: 31
Joined: Thu May 10, 2018 9:49 am

Re: Coolant level sensor replacement

Post by 486 » Sun Jan 27, 2019 8:47 pm

I guess if I open the cap to balance the pressure inside and outside the tank, then put the cap - when the sensor is removed, the coolant cannot leak because of vacuum. In other words the replacement may be done without siphon 500mls off.

dirtydirtydiesel
3.0 24v
Posts: 1374
Joined: Sun Apr 28, 2013 11:02 pm
Location: Coalville, Leics.

Re: Coolant level sensor replacement

Post by dirtydirtydiesel » Sun Jan 27, 2019 11:34 pm

If you loose some coolant you can just top it up again
Just need to know what type is in there already

My method just saves any mess & the need for more coolant, it's very easy & takes a couple of minutes :roll:

But yes what you have suggested should work but if your coolant level is correct it's higher than the level
of the sensor.
2002 110 HDi estate, Rapier in monaco blue! ( found quite a bit more power :cheesy: )
1999 3.0 V6 SE coupe in Diablo Red ( my baby )
2006 206 1.4 16v sport in Aegean blue ( wife's shopping trolley :roll: )

pp2000 owner / user, can offer Diagnostic's / fault code, reading / clearing for beer tokens in Leicestershire.

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