Sump, 'Correct' Volume of Oil

L.A.B. · Oct 7, 2021

Mart UK said:
Yes, always check on centre stand. I may not be explaining myself very well. With my oil cap, it's possible to put it into the gaps in the lip of the filler in two different orientations, 180 degrees apart (orientation A and orientation B). I didn't think it mattered that the filler neck isn't vertical, so long as the dipstick always enters the oil at the same point regardless of which way round I'd inserted the cap, I.e. A and B always enter the surface of the oil at the same point.

At the moment, if you look side on at my dipstick, it leans, I.e. if you stand the cap upside down on the bench, the dipstick isn't straight up, it leans, the fold is greater than 90 degrees. My dipstick definitely doesn't read the same if inserted into the tank using orientation A vs B. I think, because it goes into the oil at different angles, giving different readings, depending on which 180degree orientation of the cap.

I'm not sure if it makes a significant difference or not but yes, ideally, the dipstick should be angled so the end is approximately in the same position regardless of which position the cap is fitted and therefore on the centreline of the cap/plate, however, it's a bit late to check now but I'm fairly sure the dipstick plate can move independently inside the spring-loaded cap so it's position could change slightly each time the cap is turned.

Beemer · Oct 7, 2021

Both of my 750 usually have about a cup after a week or two. I have new check valves in both

Sump, 'Correct' Volume of Oil

L.A.B.

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Beemer

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