Oil level sensor

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dazthephot
Joined: Wed 09 Apr, 2008 19:58
Posts: 166

  Z3 roadster 1.9i
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Oil level sensor

Post by dazthephot » Tue 22 Jan, 2019 18:34

Just a quick check guys. My amber oil indicator is taking longer to go out after start. There’s plenty of oil in so is it a sensor replacement job? Can the sensor be serviced or cleaned?

Thanks.


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NZ00Z3
Joined: Thu 23 Jun, 2016 02:26
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  Z3 roadster 3.0i

Re: Oil level sensor

Post by NZ00Z3 » Tue 22 Jan, 2019 19:37

Change the sensor at the next oil change. They are not serviceable.

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dazthephot
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Re: Oil level sensor

Post by dazthephot » Tue 22 Jan, 2019 20:09

NZ00Z3 wrote:Change the sensor at the next oil change. They are not serviceable.
Ah right thank you.


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Mike Fishwick
Joined: Fri 19 Jun, 2009 11:27
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  Z3 roadster 2.8
Location: Daglan, France

Re: Oil level sensor

Post by Mike Fishwick » Sat 26 Jan, 2019 12:33

The sensor operates by heating a small amount of oil around its body, and then reading the incerease in temperature further up the sensor body.

Your problem may therefore be as simple as an accumulation of sludge on the sensor body, acting as a heat insulator, so it is worth removing the sensor and checking it for cleanliness before dashing out to buy a replacement.

It should be possible to test the sensor by turning on the ignition - the light should be on - and then wrapping a towel soaked in hot water around the sensor body, which should cause the warning lamp to go out.
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dazthephot
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Re: Oil level sensor

Post by dazthephot » Sun 27 Jan, 2019 15:17

Mike Fishwick wrote:The sensor operates by heating a small amount of oil around its body, and then reading the incerease in temperature further up the sensor body.

Your problem may therefore be as simple as an accumulation of sludge on the sensor body, acting as a heat insulator, so it is worth removing the sensor and checking it for cleanliness before dashing out to buy a replacement.

It should be possible to test the sensor by turning on the ignition - the light should be on - and then wrapping a towel soaked in hot water around the sensor body, which should cause the warning lamp to go out.
Ah brilliant thanks Mike I’ll try that. There’s bound to be sludge in there as the car only runs for 20 minutes am then the same pm as the missus commutes to work in it. The car doesn’t even heat up enough to burn any rubbish out of the oil.


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