M10 oil light flickering

[eko]

Replaced the engine in my 318i about 2 months ago with one from a breakers.It has done 99k and sounds sweet.
I paid Ԛ£100 for it and got 3 months warranty.
I gave it a service when fitted and have just changed the oil and filter again after 3000 miles trouble free.
Problem i have is at the start of last week the oil light started flickering on/off at idle.Soon as i raise the revs it goes off.
I have noticed no other issues ie rattles,knocking or lack of power after it being like this for over a week,so my thinking is that i may have a faulty sender switch?
Problem is i cant find where it is on the engine
When i do find it is there anyway of testing it or should i just replace it?(dont want to spend more money on it if the engines got to be replaced again)

Any advice would be welcomed

[Gwynleym10]

Mine sometimes flicks on, but as long as thte level is fine then your fine. Probably might be worth giving it a bit of a clean if you do find it....

Or you could just do and engine flush, mine seams to do it more when it needs an oil change

[eko]

Or you could just do and engine flush, mine seams to do it more when it needs an oil change

i flushed it when i first fitted it,but didnt do it this oil change,but surely it wont need doing again this soon?

[Gwynleym10]

It may depend on how long the engine was standing, if there was a build up of sludge. After running it for a couple of thousand miles, you may have loosened up more crap than the first flush did.

otherwise, just clean the sensor....

[eko]

Bought some more oil,filter and engine flush this afternoon so will try that,but can anyone else shed any light as to where the sender is loated?
Would be much appreciated

[eko]

come on guys someone must know where the sender is
Going to flush/change oil tomorow night so could do with knowing soon.
PLEASE