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Nearly every modern torque converter auto has a similar procedure for changing the oil. Even the the dealers with the correct tools get it wrong occasionally.
Are you speculating , or do you know about modern plastics (derived from Ineos chemicals )?
BMW engine plastics failing is a well known weak point.Are you speculating , or do you know about modern plastics (derived from Ineos chemicals )?
Plastics made in 2025 are not the same as those made in the 70s/80s (though plastic parts in my 70s/80s Porsches are still absolutely fine)
I'll just quote a random guy off a BMW forum
Today I changed the oil in the front differential after 18500 km. After opening the drain plug, 2,180 liters came out, which I exchanged for the same amount of Fuchs Titan Supergear 80W-90. With this amount, the oil level in the diff was. approx. 1 cm below the inspection opening. Tomorrow I will find out how oil is in the rear Diff. For 20 liters Diff oil I paid 85,44 Euros. That's less than 10 Euros for an Diff Oil change.
How did you measure a delta of 1cm between oil level and fill hole?Today I changed the oil in the front differential after 18500 km. After opening the drain plug, 2,180 liters came out, which I exchanged for the same amount of Fuchs Titan Supergear 80W-90. With this amount, the oil level in the diff was. approx. 1 cm below the inspection opening. Tomorrow I will find out how oil is in the rear Diff. For 20 liters Diff oil I paid 85,44 Euros. That's less than 10 Euros for an Diff Oil change.
31 Nm
With a cable tie. However, this method is very inaccurate because the cable tie cannot be inserted into the housing at a right angle. That's why, when I filled it, I initially stuck to the amount that had previously flowed out.
No, this is a special O-Ring. Much stiffer than the usual black ones. Maybe a Viton ring. I think for now it is ok.
But how much difference can 1cm make ? Not much I am assuming. It’s not a high precision mechanism
Today I changed the rear differential oil. I made myself a special tool to measure the oil level in the Diff. (see picture) It was 23 mm!! under the bottom edge of the filler plug. I drained around 2.2 liters, which corresponds to the information in the table. I also refilled this amount. I don't know why the oil isn't topped up to the overflow.
Oh 23mm. But you previously said it was only a delta of 1cm?
I’ve had 6 BMWs including X5, X6 and 328. Never had an engine fail or any plastic bits break in any of them. Highest mileage was in an X6 -160,00km and is still going fine. Only engine components I ever needed replaced are a crankshaft vibration dampener (rubber and metal) and a couple of hose pipes.
