Unable to remove coolant level sensor

Questions not related to the fuel type, like Manual Gearbox, Body Work, Lights, Interior trim and Seats, Steering, Brakes, Beeping, Wheels and Tyres to be asked in this topic only.

Audio has its own section - see further down the page.

Please provide as much information as you think may be relevant like recent work on the car and you can attach photographs directly to your topic using the form below the text box.
Forum rules
One question per topic.
No Engine questions
Think: Manual Gearbox, Seats, Bodywork, Lighting, Interior, A/C, Heater, Wheels, Steering, Brakes, Tyres and Suspension
My Name: Ukphiltr7

Experienced Member
Posts: 49
Joined: Sun Dec 02, 2018 9:34 pm
Model: C3 2002-2005, Original shape model
Year: 2004 (54)
Engine Size: 1.4 (16v)
Fuel Type: Diesel
Mileage: 80000
Trim Level: LX
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)
Has thanked: 2 times
Been thanked: 4 times

Post

I have been having the coolant level sensor playing up recently, beeping and red light flashing on the temp gauge. So I purchased a new sensor and tried to replace it in the expansion tank.

I removed the connector, turned it to the left (so pin connector was facing down) and tried to pull it out. However, it does not want to budge.

Is there anything else I need to loosen of a clip I cannot see to loosen it and get the sensor out?
My Name: Ukphiltr7

Experienced Member
Posts: 49
Joined: Sun Dec 02, 2018 9:34 pm
Model: C3 2002-2005, Original shape model
Year: 2004 (54)
Engine Size: 1.4 (16v)
Fuel Type: Diesel
Mileage: 80000
Trim Level: LX
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)
Has thanked: 2 times
Been thanked: 4 times

Post

At the moment, I have not had any luck getting the sensor off the bottle. So I have connected it again and filled the bottle up so I could use the car.

If anyone can assist with removing the sensor, it would be much appreciated.
User avatar
My Name: C3driver52

Guru
Posts: 2012
Joined: Sat Apr 30, 2011 7:40 pm
Model: C3 2002-2005, Original shape model
Year: 2003 (03)
Engine Size: 1.4 i
Fuel Type: Petrol
Mileage: 79984
Trim Level: VTR+
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)
Engine name: TU3 (75 PS)
Has thanked: 146 times
Been thanked: 78 times

Post

Hi

I have never removed the sensor but if you have the new sensor in your hand can you see how it would be removed?

A quarter turn is my first guess..
User avatar
My Name: C3driver52

Guru
Posts: 2012
Joined: Sat Apr 30, 2011 7:40 pm
Model: C3 2002-2005, Original shape model
Year: 2003 (03)
Engine Size: 1.4 i
Fuel Type: Petrol
Mileage: 79984
Trim Level: VTR+
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)
Engine name: TU3 (75 PS)
Has thanked: 146 times
Been thanked: 78 times

Post

citroen c3 coolant level sensor
citroen c3 coolant level sensor
coolant_level_sensor_citroen_c3.jpg (45.1 KiB) Viewed 24 times
Looking at the part it seems to be a quarter quarter turn and then a pull to overcome the o-ring.
User avatar
My Name: C3driver52

Guru
Posts: 2012
Joined: Sat Apr 30, 2011 7:40 pm
Model: C3 2002-2005, Original shape model
Year: 2003 (03)
Engine Size: 1.4 i
Fuel Type: Petrol
Mileage: 79984
Trim Level: VTR+
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)
Engine name: TU3 (75 PS)
Has thanked: 146 times
Been thanked: 78 times

Post

coolant level sensor
coolant level sensor
citroen_c3_coolant_level_sensor_removal.webp (23.22 KiB) Viewed 24 times
User avatar
My Name: Ozvtr

Moderator
Posts: 1194
Joined: Wed Jul 10, 2019 3:31 am
Model: C3 2002-2005, Original shape model
Year: 2003 (53)
Engine Size: 1.4 (8v)
Fuel Type: Petrol
Mileage: 80000
Trim Level: Other
Gearbox: Automatic PRND
DPF: No
LHD or RHD: RHD
Engine name: TU3 (75 PS)
Location: Brisbane, Australia.
Has thanked: 59 times
Been thanked: 351 times

Post

The Oring has probably adhered to the expansion tank.
Try and gently pry the sensor out.
My Name: Ukphiltr7

Experienced Member
Posts: 49
Joined: Sun Dec 02, 2018 9:34 pm
Model: C3 2002-2005, Original shape model
Year: 2004 (54)
Engine Size: 1.4 (16v)
Fuel Type: Diesel
Mileage: 80000
Trim Level: LX
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)
Has thanked: 2 times
Been thanked: 4 times

Post

Thanks for the reply and the tank picture, it shows me how things go in out of my sight. I have turned it 1/4 turn and I can feel that the one side feels like it wants to come out of the clip, but the other does not. I did try to wiggle/gently force it out but no movement. I will try again and see if it has come loose a bit.

I did look the other day at new tanks and they are not too expensive, if I break it and need a new one.

I think it is jammed, but do not want the car off the road long due to waiting for a new tank :D
User avatar
My Name: C3driver52

Guru
Posts: 2012
Joined: Sat Apr 30, 2011 7:40 pm
Model: C3 2002-2005, Original shape model
Year: 2003 (03)
Engine Size: 1.4 i
Fuel Type: Petrol
Mileage: 79984
Trim Level: VTR+
Gearbox: Manual 5 speed
DPF: No
LHD or RHD: RHD (UK)
Engine name: TU3 (75 PS)
Has thanked: 146 times
Been thanked: 78 times

Post

The clear plastic tanks are quite tough and even with a fair bit of levering to get the cap off, I didn't do any damage to it.

The black sensor on the other hand looks like it will just snap if you look at it too long.
  • Similar Topics
    Replies
    Views
    Last post