06-24-2021, 07:25 AM | #23 |
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Not sure what your guage reads, but mine STARTS at 70C. Once it's moving past 70C that is MORE THAN ENOUGH. It typically stops at 90C (aka almost boiling point of water).
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06-24-2021, 09:20 AM | #24 | |
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To bring myself back on topic, when I was 18 my parents bought me a mustang for god knows what reason and I absolutely ragged on that sucker. Would pretty regularly fire it up stone cold and drop a burnout. Engine seized at 7,000 miles and thankfully got it lemon-law'ed, but learned my lesson the hard way. My 328xi went 70k miles without a single un-scheduled maintenance item, other than a tranny fluid flush that was probably about timely anyways, never going over 3k rpm until gauge had made a little forward progress. Pretty much keeping the same procedure for the b58. As far as I'm concerned, if you couldn't hop in the car and drive off BMW (and.. every other car mfg...) would be implementing mandatory warm-up procedures. Surely less than 10% of bmw owners are even considering a warm up time in modern cars... |
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06-25-2021, 08:00 AM | #25 |
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Drives: 2015 BMW 340i m-sport
Join Date: Jun 2021
Location: Perth, Western Australia
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B58 not enjoying the recent cold weather
My 340i has been rough as guts for the first couple of km in the recent cold weather here in Perth. Good once warm. The car is due for a service but just wondering if there is anything else I should be looking out for? Only 55,000km so plugs should be fine.
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06-25-2021, 07:54 PM | #26 | |
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You could almost hear the little pistons screaming in pain. |
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06-26-2021, 05:47 PM | #27 | |
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07-04-2021, 07:38 AM | #28 |
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Did some logging of the oil and coolant temperatures when I just bought my previous car (440i) because I didn't trust how quickly the oil reached operating temperature. The engine oil heats up at the same rate as as the coolant as you can see in the first graph attached.
Looking at the coolant system schematic that behaviour is probably explained by the fact that the B58 has a coolant/oil heat exchanger to make sure the oil get heated up more quickly. Also I believe this system is primarily focussed on heating up the top of the engine as quickly as possible to reduce emissions. Using another app I could log both engine and sump oil temperature and then you can see a clear difference in how quickly the oil heats up. Out of interest I also added the transmission oil temperature.
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07-04-2021, 07:42 AM | #29 | |
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07-04-2021, 07:48 AM | #30 | ||
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Just coming back to your original question, I also believe that gentle driving for about 10 minutes after cold start is the best way the warm up the engine. And as you can see from the graphs it does take about that time for all the oils to reach decent operating temperature.
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