03-05-2018, 04:02 PM | #1 |
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Engine Temp too high!
Hi all,
Going thru a drive thru yesterday I got the message 'Engine Temperature too high - drive moderately' message on my 6MT 2015 M235i. I was not even waiting for more than 5-7 minutes. It went away once I started driving again (keeping rpms low) and has not reappeared since. Ambient was around 64F and I was driving very normally. I called the Service folks and they said call them if it comes up again. Should I try to heat it up and see if it happens again? Any ideas? Thank you! |
03-05-2018, 04:09 PM | #2 |
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sounds like the water pump is about to fail.
It seems little early based on your car model year. It typically fails after 50k miles or so. Keep your ears open if the engine cooling fan turns on way too frequently. |
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03-05-2018, 04:10 PM | #3 |
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Couple of things, was there a car in front of you throwing off a lot of heat from their exhaust.
Also a coating of road schmutz: salt, dirt and leaves from snow etcetera over the radiators? Also: make sure no rodents are nesting in your air filter, they can leave debris that restricts, might want to pop off the cover and bang out the air filter. |
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03-05-2018, 09:56 PM | #4 |
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Drives: 2015 BMW M235i
Join Date: Feb 2016
Location: ontario
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I bet it's the cooling fan. I would bring it in. It's not common but it does happen. Should be a pretty easy fix.
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03-08-2018, 02:55 PM | #7 |
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Pal of mine with a 2015 228i M Sport w/ZHP at 18k miles had this exact scenario happen to him last Thursday. And it was the cooling fan completely failing. Fixed under warranty.
Beware: This appears to be the emergence of an issue with 2015 cars.
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03-17-2018, 04:58 PM | #8 |
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This happened to my 2015 228i in October. Faulty cooling fan that had to be replaced. Car was towed to the dealer after I had to shut it down from overheating messages. Not fun.
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03-19-2018, 06:45 AM | #9 |
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Anyone happen to notice if their cooling fan was running excessively loud prior to failing?
On several occasions I have noticed my 2016 m235i's cooling fan going full bore. I usually dismissed this as it was 90 degrees F and I had it idling for a while. Still the fan was liuder than I was used to. Since the winter I have barely noticed the fan at all. |
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03-19-2018, 11:45 AM | #10 |
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Just a side note. The good news is these cars are very difficult to overheat, in the sense the coolant gets so hot the engine is damaged. The computer monitors just about everything coolant wise (a lot more than just coolant temperature). It will throw up the warning and may put the car in limp mode if a serious anomaly is detected. How do I know? My wife was driving the car when the dreaded over heat warning came on and the car went in to limp mode in the middle of an intersection (no more than 10 mph and almost no throttle). She pulled into the nearest parking lot. The car has an aftermarket temperature gauge and the gauge was showing a normal temperature. We towed the car to the dealer for the diagnoses.
Well after they read the codes it turns out the computer instructed the electric water pump to increase speed while my wife was crossing the intersection, the computer then detected that the new higher water pump rpm was 20% below normal. Bingo! Warning light and limp mode. I asked the SA why the warning and limp mode before the coolant even climbed above the normal operating range? He said that BMW's coolant monitoring system is designed to predict over temperature conditions and will typically intervene long before any engine damage is done. |
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03-19-2018, 01:20 PM | #11 |
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This is very interesting. I see this as direct evidence for why an engine temp gauge is not included in any 2 Series. In one sense, there's no point because of the ECU nannying -- yet I'm kind of at a loss as to why that same predictive programming apparently doesn't extend to fan failure. Hypothesis: Possibly since it's not an internal part like the water pump is -- and because of the well documented water pump-failure issues early N20s had.
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03-19-2018, 09:56 PM | #12 |
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I don't think the lack of a gauge is that huge of a deal. Most coolant gauges are just dummy gauges. If you really want to monitor oil and coolant temps, buy the $5 Torque app and a quality $30 BT OBDII gauge and watch it plus boost and tons of parameters through your Android phone. Love it.
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03-20-2018, 01:39 PM | #13 | |
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Quote:
Which is exactly what I did with a P3Cars gauge ... and why the pal I mentioned earlier who had the cooling fan failure bought that P3Cars gauge from me this past week. If it's huge enough for that, it's huge enough for BMW to include such a gauge in a car with a history of not one but two part failures that cause the car to overheat. The 3 Series has it. The 2 Series should, too. (Also, as an aside: I would have never been aware of some cold-weather voltage issues my car was having without the voltmeter in the P3Cars gauge, either. Those issues cleared up a few weeks ago after I left the car on a smart trickle charger for nearly two weeks straight.) :: end of rant ::
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--Helmets are for closers.-- <<Current: "Blackened" '18 NBM Porsche 718 Cayman ... Gone (but not forgotten): "Blackened" MG '15 228i M Sport w/aFe filter/scoop, Hertz drivers, P3Cars multigauge, other goodies>> Last edited by Viffermike; 03-20-2018 at 03:09 PM.. |
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03-23-2018, 02:25 PM | #15 | |
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Quote:
It has heat management module (fancy word for coolant bypass valve) that controls the warm up. Also, B58 has engine encapsulation (another fancy word for insulation) that keeps the heat after the engine shut off in cold ambient. Once, I monitored the coolant temperature warm up. My car was parked for 9 hrs in 10~15F ambient, then started the car, drive for 5 minute and coolant temperature was already 60 C (140F). It warms up really quickly. |
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03-26-2018, 01:31 PM | #16 |
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The B58 engine has 2 cooling systems. 1 is for the engine, the other is for the turbo. The pump for the engine is mechanical while the pump for the turbo is electric.
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03-26-2018, 01:47 PM | #17 | |
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1 mechanical pump for engine cooling circuit. Coolant temp is around 100 C for this cooling circuit. 1 electric pump for CAC and AC condenser. Coolant temp is close to ambient for this cooling circuit. 1 small electric pump for turbo cooling. I believe it's on main cooling circuit. Powertrain thermal management seems very good on B58 engine. Warms up very quickly and holds the target temperature very well. |
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03-27-2018, 12:55 AM | #18 | |
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Quote:
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03-28-2018, 01:13 PM | #19 |
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Happened to me twice
first time was the water pump, second time was caused by a leak in the radiator lines
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