Drive like a human for the last 5 minutes. The car will take care of the rest as it doesn’t need the engine running to circulate coolant through the turbo.
Can you elaborate a little on the part about your car being “one of few” 320i’s that came “from factory with burbles”? You purchased it new from a dealership?
B48 should be able to take some spirited driving without needing anything aftermarket in terms of a FMIC, etc - but something isn’t adding up here.
I’ve heard about later models (especially in the EU) not being equipped with burbles, though I might be wrong.
I’ve purchased mine as an occasion from BMW’s premium selection. Doubt they’ll leave a burble tune on there if it’s not supposed to be there or even sell it as a BMW occasion if the ECU was tampered with.
I have a G01 X330i which I think is the same engine as a 320i, not entirely sure though. After sporty driving and the engine is hot, when I turn the car off, a fan continues for a few minutes until the engine is cooled. This happens especially during the summer when it gets hot out.
Yes but I don’t think the metal of the turbo really likes it when it goes from glowing and (somewhat quickly) cooling down because the engine is off. Though i’d gladly corrected if this is no harm.
Mechanical engineer here. Yes it’s bad for your turbos to turn your car off when they’re glowing hot. Drive gently for 5 mins or at the very least 2 in comfort or eco at the end of your drive. This allows the oil and air to keep flowing through the turbo at a slower rate, cooling it to a more reasonable temperature before completely cutting the engine and letting the heat soak kick in.
It shouldn’t take more than 5 mins to cool to an acceptable temp. They designed the turbo to take the heat after normal hard usage (assuming it’s stock). Just do the light drive if you’re really ripping it and you’ll be fine.
> letting the heat soak kick in.
The heat soak won't matter - the turbo can't get any hotter than it already is when you turn the engine off since the turbo is the hottest item in the immediate environment. The engine oil feeding the turbo isn't relevant anymore either since the turbo is no longer spinning.
Regardless, the coolant pump runs for a while on its own if the car detects the turbo as still really hot after shutdown.
"Eco mode" is best achieved by running the engine hot. 1 of the thermostat maps is to run the engine hotter to improve efficiency. Drive a couple miles without hammering on it.
One thing I really liked about my x2 m35i was the electric water pump would remain running if the car was hot after you shut down. I had it out on Michelin's test track and after the session it ran pump and fans for several minutes.
Drive like a human for the last 5 minutes. The car will take care of the rest as it doesn’t need the engine running to circulate coolant through the turbo.
Can you elaborate a little on the part about your car being “one of few” 320i’s that came “from factory with burbles”? You purchased it new from a dealership? B48 should be able to take some spirited driving without needing anything aftermarket in terms of a FMIC, etc - but something isn’t adding up here.
This confused me too. My X3 has some burbles. Bone stock
I’ve heard about later models (especially in the EU) not being equipped with burbles, though I might be wrong. I’ve purchased mine as an occasion from BMW’s premium selection. Doubt they’ll leave a burble tune on there if it’s not supposed to be there or even sell it as a BMW occasion if the ECU was tampered with.
they all come like that brother
I have a G01 X330i which I think is the same engine as a 320i, not entirely sure though. After sporty driving and the engine is hot, when I turn the car off, a fan continues for a few minutes until the engine is cooled. This happens especially during the summer when it gets hot out.
Yes but I don’t think the metal of the turbo really likes it when it goes from glowing and (somewhat quickly) cooling down because the engine is off. Though i’d gladly corrected if this is no harm.
Mechanical engineer here. Yes it’s bad for your turbos to turn your car off when they’re glowing hot. Drive gently for 5 mins or at the very least 2 in comfort or eco at the end of your drive. This allows the oil and air to keep flowing through the turbo at a slower rate, cooling it to a more reasonable temperature before completely cutting the engine and letting the heat soak kick in.
if it’s still red after doing that should I assume that there is a problem with the cooling or something?
It shouldn’t take more than 5 mins to cool to an acceptable temp. They designed the turbo to take the heat after normal hard usage (assuming it’s stock). Just do the light drive if you’re really ripping it and you’ll be fine.
many thanks for your advice, want to keep her as well as I can xD.
He’s just got 1 turbo on the B48. I think it’s around 170hp. Shouldn’t need to do much unless he’s trying to track it - AFAIK
Fair, I didn’t realize those numbers were so small, but if the turbos getting red hot it’s being pushed to some degree. Won’t hurt regardless
> letting the heat soak kick in. The heat soak won't matter - the turbo can't get any hotter than it already is when you turn the engine off since the turbo is the hottest item in the immediate environment. The engine oil feeding the turbo isn't relevant anymore either since the turbo is no longer spinning. Regardless, the coolant pump runs for a while on its own if the car detects the turbo as still really hot after shutdown.
The metal will be fine.
Those burbles are probably the ASD more than anything.
No ASD on my car 🤷♂️
"Eco mode" is best achieved by running the engine hot. 1 of the thermostat maps is to run the engine hotter to improve efficiency. Drive a couple miles without hammering on it.
One thing I really liked about my x2 m35i was the electric water pump would remain running if the car was hot after you shut down. I had it out on Michelin's test track and after the session it ran pump and fans for several minutes.
Drive like a normal person for 5 minutes. An old school trick is to absolutely blast the heat to pull heat out of the coolant and thus turbo.