[johnnyalanbailey]

Hi,

So I’m an owner of a late 2016 318d with the B47. Had the car a couple of months but with weather changing recently I’ve been paying more attention to the oil gauge.

I’ve read most models operate at 100°c oil temp, give or take a few. The owner’s manual is obviously useless and just says the correct temp should be ‘in the middle or left half’ of the gauge, so could be anything from 50-100. Thanks BMW.

So, I’m operating at about 80°c oil temp after about 10 miles of any kind of driving, and it is fairly steady at that temp, sometimes goes up slightly, never drops below 75°c though. The car warms up quickly (within about 5 mins I’m comfortable in -°c weather). When I checked the coolant temp/engine temp on the secret screen, it was around 77-90. The coolant didn’t seem to go above that after about an hour of London city driving, fluctuated though within that range by a fair bit.

Since I’ve been looking out for the gauge, it’s been to 100°c approx twice, once on the motorway at 70mph, in ecopro, and once whilst sat in a London traffic jam for about an hour standstill. I am getting very good fuel economy (rarely below 70mpg on the motorway).

Is this a common problem? I haven’t found anything online for the B47 and thermostats that would suggest it’s a common problem. The thermostat itself looks fairly impossible to break as its spring operated depending on temp. Any help would be great!

Thanks

[johnnyalanbailey]

So update for whoever finds this in the distant future with the same problem: it was the thermostat! Very simple fix, there was an o ring that was a pain in the arse on the bigger hose of the thermostat, but it goes under the plastic ring inside the hose.

That took 2 1/2 hours to figure out, the swap took about 1 1/2 hours, just some 10mm bolts

Good luck!

[1qwer1]

I have to a BMW F31N 318d B47 and yes temp oil when the engine is fully warmed up that is 100°C.

[johnnyalanbailey]

Originally Posted by 1qwer1

I have to a BMW F31N 318d B47 and yes temp oil when the engine is fully warmed up that is 100°C.

Yes, mine sits at exactly 100°c now that the ‘stat is fixed.
Only takes like 20 mins to get to that too and that’s in -°c weather.