e53 Diesel, Loud engine and Oil pressure light.

[Clavurion]

Originally Posted by Redraptor141

Here is a thought? Have you got a Foxwell or something you can watch live dad from as you drive? Maybe be worth having a gander at the oil pressure live data And drive in differnt conditions to see if it gets effected.

M57 does not have oil pressure sensor so you can't monitor oil pressure with diagnostics. Only oil pressure switch on the oil filter stem (has a threshold value to trigger oil pressure warning).

Originally Posted by Redraptor141

Seals and that degrade. The one I pulled off my e39 (admittedly that had 260K hard miles on it!) was the internal spur gears showed just cavitation damage really badly on the internals. We reckoned maybe some diesel had blown by and got into the sump and over time helped eat away at the pump, but who knows.

On my E39 530d the HP pump axle seal failed and let 6 litres of diesel in the sump. It started to run on it's own oil but I luckily managed to shut it down before any damage. After dropping 13 litres of oil/diesel from the sump and new HP pump still going strong with 400t km on the clock.

[Redraptor141]

Originally Posted by Clavurion

On my E39 530d the HP pump axle seal failed and let 6 litres of diesel in the sump. It started to run on it's own oil but I luckily managed to shut it down before any damage. After dropping 13 litres of oil/diesel from the sump and new HP pump still going strong with 400t km on the clock.

Jesus! Was it leaking out of the oil filler neck??

[Clavurion]

Originally Posted by Redraptor141

Jesus! Was it leaking out of the oil filler neck??

No. On the dipstick the level was several cm above full. The signs were the same as with a blown turbo. Thick smoke from the exhaust and started to run without foot on the pedal.