04-16-2015, 06:25 PM | #2 |
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Are you sure that isn't your oil temp? If it is, then that temp is OK. ( I don't think BMW has put coolant temp displays on our cars for some time now.)
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04-16-2015, 06:27 PM | #3 |
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04-16-2015, 06:36 PM | #4 |
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The engines have variable MAP controlled thermostats, so coolant temperature varies depending on the mode the ECU is in.
Its one of the reasons BMW dont show coolant temp anymore to regualr drivers Range is from 80C - 111C (176F - 231F ) "Normal" is around 105C (221F), so your 225F is perfect ECO mode will take it to 111C (231F)
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04-16-2015, 06:38 PM | #6 |
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Nope. MAP controlled
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04-16-2015, 09:10 PM | #8 |
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The coolant temp is going to be about the same as the oil temp. 225 seems high, as water boils at 212, but the coolant isn't pure water, and it's under pressure, which also lowers the boiling point.
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04-16-2015, 09:20 PM | #9 |
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04-16-2015, 09:37 PM | #10 |
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04-17-2015, 05:56 AM | #11 | ||
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04-17-2015, 11:53 PM | #12 | |
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04-18-2015, 04:40 AM | #13 | |
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The ECU modes are ECO,Normal,High and High+. The ECU automatically determines which mode to go into depending on driving conditions. The driver cannot select the modes.
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04-18-2015, 08:05 AM | #14 |
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OK - Thanks for the explanation.
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05-13-2015, 02:29 PM | #16 |
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BMW Data for typical N55 Engine Cooling
The engine control unit regulates the following temperature ranges: • 108°C/226°F = Economy mode • 104°C/219°F = Normal mode • 95°C/203°F = High mode • 90°C/194°F = High mode and control with characteristic map thermostat System Protection If the coolant or the engine oil overheat during operation, certain vehicle functions are influenced to the effect that more energy is available to the engine cooling system. These measures are divided over two operating modes: • Component protection - Coolant temperature between 117°C/242°F and 124°C/255°F - Engine oil temperature between 150°C/300°F and 157°C/314°F - Result: The output of the air conditioning system (up to 100%) and of the engine is reduced • Emergency - Coolant temperature between 125°C/257°F and 129°C/264°F - Engine oil temperature between 158°C/316°F and 163°C/325°F - Result: The power output of the engine is reduced (up to 90%) As you can see, 234F for engine coolant is still below any protection thresholds. HighlandPete |
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05-13-2015, 07:47 PM | #17 |
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This is not correct. The opposite is true.
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05-14-2015, 02:55 AM | #19 | |
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It's still a weird feeling coming from vehicles that ran 200F tops. All in the name of fuel economy I guess. |
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05-31-2015, 02:45 PM | #20 |
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I have a 2015 335 6 MT w/ M PPK and I noticed it was running just under 250*F. I was highway cruising at ~70mph, in sport mode, it was 72* outside, low humidity, cruise control was on, AC set at 68*. I didn't notice any reduction in power or quality of the AC. It ran at that temp for 3/4 of the trip then it went down to the usual ~220. It did concern me since I never saw the temp gauge go over the 220 mark even on 90* humid days. The SA stuttered through an answer when I questioned him about it. Then he ends with "it's normal." I hope he's right.
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05-31-2015, 02:58 PM | #21 | |
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05-31-2015, 03:05 PM | #22 | |
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