08-29-2020, 09:16 AM | #639 | |
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08-29-2020, 09:48 AM | #640 | |
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Howling tea kettle noise is still there. It has the be wind noise, it’s most obvious on deceleration from 50-40 mph, doesn’t matter what gear I’m in. I was thinking maybe it’s transmission or differential noise but it’s not constant and it makes an occasional chirping which makes me think it’s wind turbulence causing the howl. Maybe on the door seals? I’ve read about that before and the fix was adjusting the doors. Once it stops raining I’m going to put some painters tape over all the door seals and go for a drive to see if that makes the noise go away. Anyway, happy that I got a new turbo and pump under warranty and even more happy to give back the 228i loaner. New turbo part number: 11-65-9-423-787 New water pump part number: 11-51-8-632-585 Water pump gasket part number: 11-51-8-632-587 Last edited by StannisBaratheon; 08-29-2020 at 02:52 PM.. |
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08-29-2020, 02:30 PM | #641 |
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2017 440i here. Had low coolant in my first year, don't remember exactly when. At the time my SA called me to check the coolant level and it was below minimum. SA told me that many B58's had the same issue and they thought it happened from factory / bad filling.
Monitored the level for a month or two but it seemed fine so forgot about it. Going for a road trip soon so checked the level again today (car is just over 2,5 years old, done 28k miles) and it's below minimum again. Will fill it up and have the dealer check it for leaks during the next service in October. Already informed my SA about it and will keep monitoring it. If anything comes out of this I will report back.
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08-29-2020, 07:35 PM | #642 | |
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08-29-2020, 08:26 PM | #643 | |
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First, understand how the OEM tests and tunes the engine, (which is also how they achieve that number): They mount the engine to a brake dyno (connected directly to the flywheel, no transmission/driveshafts/wheels/tires/etc), and open the throttle, but tell the dyno to resist changing speed. So the engine loads up, and even if the turbo is BARELY spinning, it will slowly accelerate until it is actually compressing some air, which means more exhaust, which spins the turbo a little more... basically, they can let the engine sit at 1350 RPM very slowly spooling the turbo until the turbo is fully spooled, and then record that number. Then tell the dyno to let it accelerate to 1400, do the same thing, and record the highest number it reaches. They programmatically do this for the entire rev range, and that's how they produce the graph they market. This is very different from doing a 'dyno pull' at a standard chassis dyno. A typical 'dyno pull' is designed to more closely replicate real-world use: Accelerating as quickly as possible. So, in the real world, at 1350 RPM, the engine doesn't produce enough exhaust to instantly spool the turbo, but it does produce enough power to accelerate pretty well, which lets the RPM go up and more exhaust be produced, spooling the turbo, etc... So, no, it isn't making peak torque at 1350 RPM when you're accelerating from a stop (or from low-throttle cruise). Personally, in mine, I don't like running it that low unless I am just maintaining cruise speed. It needs to stay above about 1650 for it to feel like it has any real torque. So, the engine truly can produce that... but not while being used in a real car on a real road, basically. If you somehow had the right incline to go full throttle at 1350 rpm and not speed up any at first... you would find the engine still slowly accelerates as it builds its small amount of boost every second at that rpm. Side note, I DO wish 6th gear was taller... while I love the passing torque in 6th gear, 70mph is like 2500 rpm, it should be more like 1800, but that would mean you'd have to downshift to pass quickly.... but it would probably be worth it for the mileage gains. |
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08-30-2020, 02:52 AM | #644 |
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Thanks a lot for the detailed explanation, it all makes sense now.
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340 xdrive 6MT - HJS catted DP - MPPSK - TU HPFP - 550i clutch - VAC monoball control arms - Eibach springs - H&R antiroll bars - AutoSolutions SSK - Brembo HP2000 pads
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08-30-2020, 02:57 AM | #645 | ||
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10-21-2020, 11:46 PM | #646 |
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what is this issue? should I be concerned as I have manual 2016 340i, 35k miles as of today ?
Now moving on to the issues that are out there. This is a B-58 engine, and there has been crank bearing guide issues where they wear out early. You're more likely to find that on a manual transmission, so it's not a big issue with the X3 M40i. |
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10-26-2020, 07:59 AM | #647 | |
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https://www.bmwusa.com/safety-and-emission-recalls.html |
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10-26-2020, 07:26 PM | #648 | |
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SOLD: 2016 340i xDrive 6-speed DAW v2.5 turbo E40 | Dorch S2 | VRSF DP | MST intake | AWE catback | 335is clutch | CSF heat exchanger | RK Autowerks intake manifold | Orange M Perf Brake Kit | KW Street Comfort coilovers | GTS taillights V2 |
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11-10-2020, 06:42 AM | #649 |
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2016 340i Xdrive with just under 46k miles
Got a low coolant message about about 2 weeks ago. It always seems to be low when the weather turns cold. Topped it off and was ok for about a week. Noticed coolant on garage floor the garage floor one day and car is now at the dealer for a new water pump. |
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11-10-2020, 04:19 PM | #650 | |
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03-08-2021, 12:24 AM | #652 |
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I was doing an oil change and found some fragments in the old oil container afterwards. I am not sure if it is from my engine or the container that I used.
However because of that I did check my oil filter and I found a few small metal shavings in it. The shavings are non-magnetic, about 5 of them in the filter. What do you think? Normal wear or not? Edit: posted an image of a fragment I found in the filter Last edited by gosi; 03-08-2021 at 01:17 AM.. |
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03-08-2021, 07:40 AM | #653 | |
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03-08-2021, 06:01 PM | #655 |
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I'd get an oil analysis asap from Blackstone. At 70k miles, the engine should be fairly worn in.
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04-01-2021, 10:43 PM | #656 | |
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Today my M240i was idling for about 30-40 minutes and suddenly I heard a screeching noise followed by white smoke spewing out the tailpipe. The car seems to have burned all of my coolant off in about 10 minutes. |
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04-02-2021, 11:36 AM | #657 |
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You have a completely different issue if you burned off coolant. That person is talking about a cracked PCV.
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04-13-2021, 11:00 AM | #658 |
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Do you have a new charge pipe? I know this noise well after I installed my VRSF charge pipe. Something about the acoustics of the metal pipe maybe?
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04-15-2021, 12:11 AM | #659 |
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Bump.
Got a new valve cover, valvetronic motor, fuel tank vent valve, and fuel injector seals. Also had oily spark plugs, but I guess the dealership just cleaned them. They only had 5k miles prior to valve cover failure. Hopefully they stay working normally. |
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04-15-2021, 12:08 PM | #660 | |
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