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Topic: Header tank sensor (Read 944 times) |
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Glyn
Full Member
Now an OAP ! 95 cossie and another !and a 12v
Posts: 584
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Header tank sensor
« on: Feb 7th, 2012, 10:11pm » |
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Can anyone help? I nearly lost all coolant(and the engine!) with a leaking water pump_second in 4 years and only 20 months old! Point is the low coolant level warning light didn't ! Took the header tank off washed it out light on but goes off as soon as I put the sensor back in the tank even though empty-anybody met this before?
24v
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Baz
Moderator
Senior Member
S Reg. 1998 24v Cosworth S2.9 COS (Deceased)
Posts: 4009
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Re: Header tank sensor
« Reply #1 on: Feb 26th, 2012, 2:39pm » |
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Glyn,
It sounds like the float that surrounds the sensor is stuck at the high point. possibly when you have taken it off, it has got stuck while you were washing it.
Take off the tank again and try and shake the float loose.
It works as follows. The sensor is securely fixed into a tube, fitted into the base of the tank and does not move. Inside the tank (surrounding the tube that holds the sensor) is a floating magnet type thing. When the fluid level is correct, the float is sat higher than the sensor and makes no connection. when the fluid level drops, the float drops and causes a contact to make and illuminates the light!
Baz
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lesterlad aka Rodders
Full Member
2.3 Ghia x Estate (Manual)
Posts: 877
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Re: Header tank sensor
« Reply #2 on: Feb 26th, 2012, 4:54pm » |
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Mine must be very sensitive then, the warning light comes on when the coolant level is just 20mm below the max line.
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There's are methods to my madness!!! I'm not sure what the methods are but there's definitely madness in them
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blackwatch
Newbie
2.5td Ghia x Estate (Manual)
Posts: 34
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Re: Header tank sensor
« Reply #3 on: Feb 26th, 2012, 9:15pm » |
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make sure that you fit it the correct way up or it will never work...............
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Nothing like a classic
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Glyn
Full Member
Now an OAP ! 95 cossie and another !and a 12v
Posts: 584
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Re: Header tank sensor
« Reply #4 on: Apr 20th, 2012, 12:26pm » |
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 thanks to you all, I bought a new tank-less than £30 inc delivery and all well and now mine too lights up when level is just below max mark
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