[B58]

I just changed my oil to liqui moly 5w40. I don't recommend anyone running 0w20 unless you drive like a grandpa lol. The best oil to probably use is the Shell Rotella T6 5w40 since diesel oil has a larger amount of zinc for better protection. We did find a small glaze of metal in the left over oil sitting on the oil filter housing cap, but it just appeared to be normal wear from the engine and nothing on or inside the oil filter itself. Next oil change I'm going to send the oil out for a analysis.

[youngdoc1]

Returning 340i lease this week with 43 000 miles, not a single issue with the engine/transmission.

[NormanConquest]

Originally Posted by youngdoc1

Returning 340i lease this week with 43 000 miles, not a single issue with the engine/transmission.

Any idea what you will replace it with?

[youngdoc1]

Originally Posted by NormanConquest

Any idea what you will replace it with?

X4 M40i. Looking forward to it!

[B58-Rocks]

Thank you for your answers!

The MG FLASHER app is one of the best Apss I've seen so far. The support is simply unique. I do not know if the other manufacturers can be just like these people .... but it can not be any better.

if you have discovered a mistake or a wish, which is said to support, it will be perceived and implemented immediately!

Best Team!

[NormanConquest]

Originally Posted by B58-Rocks

Thank you for your answers!

The MG FLASHER app is one of the best Apss I've seen so far. The support is simply unique. I do not know if the other manufacturers can be just like these people .... but it can not be any better.

if you have discovered a mistake or a wish, which is said to support, it will be perceived and implemented immediately!

Best Team!

Post on wrong thread?

[Wires]

Originally Posted by cfm56d7b

How many forum members experienced cylinder wall scoring in B58 engines?

Mileage? Symptoms? BMW response?

EVERY Otto style engine has scoring over time. You cannot drag pistons up and down in the bore without that happening.

The real question is "how bad was your scoring, and how does it compare to other similar engines"?

I guarantee anyone that hasn't had issues does not get the cylinders scoped, and pictures taken so they just don't know.

[bucky_u]

Originally Posted by TakoMako

No harm done by asking for it. BMW over here did it because some other tests failed.

Well I suppose that if the valve cover was replaced, then I they would have seen other damage underneath without needing to borescope. Must have been clean enough.

[BMW in NE]

Originally Posted by cptcrunch

No issues here on the B58 engine except the 'stumble' or rough idle after initial start once the RPMs go below 1000 and how the engine acts like its a cold startup everytime the car is started, regardless of how warm the engine is.

I had this same issue. Dealer found 47 misfire counts in cylinder 3 due to a faulty spark plug. Got the car back and it idles like it should.

[madmortar]

Safe to say later years N55 might be more reliable vs. B58?
Or vice versa?

[NormanConquest]

Originally Posted by madmortar

Safe to say later years N55 might be more reliable vs. B58?
Or vice versa?

Currently the B58 has been more solid then the 2014 N55 that I had in comparison to miles.

[vinzcast21]

Originally Posted by BMW in NE

I had this same issue. Dealer found 47 misfire counts in cylinder 3 due to a faulty spark plug. Got the car back and it idles like it should.

mine is cyl 2 yay

[ntailor]

Originally Posted by BMW in NE

I had this same issue. Dealer found 47 misfire counts in cylinder 3 due to a faulty spark plug. Got the car back and it idles like it should.

Did any codes show up? CEL?

[madmortar]

Originally Posted by NormanConquest

Currently the B58 has been more solid then the 2014 N55 that I had in comparison to miles.

interesting.

just a bit thrown off by the few examples of B58 misfires causing cylinder wall damage and a toast engine. Coming from a n20 with the timing chain issues, I just need a reliable engine if I make a jump!

[bimmer456]

Originally Posted by madmortar

interesting.

just a bit thrown off by the few examples of B58 misfires causing cylinder wall damage and a toast engine. Coming from a n20 with the timing chain issues, I just need a reliable engine if I make a jump!

Yes B58 has been pretty good after 53k miles. Know blown charge pipes reported on this forum like with the N55 and upgrading to steel aftermarket pipe required. No timing chain issues reported by users. Did have low coolant initially but pressure testing by BMW revealed no leaks. No factory recalls for me only small numbers of units had recalls. Seems as bulletproof as a Honda. I did have one situation where the idle got erratic for some unknown reason and resolved itself after turning it off and turning it back on. Dealer was not able to replicate. Seems Toyota is confident enough to use it and the Z4 platform in the Supra. Solid enough that you can tune it.

[ESvensson]

M140 production date 11/16.

- At 8k miles ignition coil broke on 6th cylinder... bmw replaced it (and all sparkplugs) under warrenty.
- 600 miles later same thing... bmw then also replaced fuel injector and some gasket to the crank case ventilation. Warrenty.
- 20k miles... same thing again... dealer and technicans from germany does every test posibble... leakdown, compression, checking for oil in crankcase ventilation... cant find anything wrong except the pressure of the crankcase ventilation...
So they gave up and replaced the whole engine on goodwill.

The car ran a Jb+ set at 3 a’clock....

[fun240i]

'17 240 17k miles....this may be a dealer issue....but noticed for first time coolant a bit low a month after a 5k 12 month service...low coolant warning...checked large reservoir stone cold engine...below min mark but coolant visible.....overflow tank correct level....taking back to dealer for a check.
this minor blip aside.....bmw got this motor exactly right....smooth as silk.

[Araemo]

Originally Posted by bimmer456

Seems Toyota is confident enough to use it and the Z4 platform in the Supra. Solid enough that you can tune it.

After doing multiple post-testing teardowns and requesting design/parts changes to address their reliability concerns discovered during those teardowns, yes.

So: First-gen B58? Probably pretty reliable for a BMW engine.
Post-Z4 B58 revisions: Probably very reliable. But until those changes make it out to every car that has a B58, don't think it has Toyota reliability.

[VVlasy]

Originally Posted by Araemo

After doing multiple post-testing teardowns and requesting design/parts changes to address their reliability concerns discovered during those teardowns, yes.

So: First-gen B58? Probably pretty reliable for a BMW engine.
Post-Z4 B58 revisions: Probably very reliable. But until those changes make it out to every car that has a B58, don't think it has Toyota reliability.

Source? Insider info?

[MassNerd]

Source was automotive journalists at the recent Supra press event in Texas asking about reliability and getting the answer about teardowns.

[BMW in NE]

Originally Posted by ntailor

Did any codes show up? CEL?

No CEL.. here's the notes from the tech.. " 10186 cold start. intermittent skip in engine. Connect charger ck faults no faults stores in dme. Connect actron tester. ck shadow faults. 47 misfires stored for cylinder 3 in accumulated misfires. swap coils with cyl 4, run misfire test. still missing in cyl 3. swap spark plug from 3 to 2. run misfire test. misfire now records in 2. replace plug & clear all faults road test. "

[Araemo]

Originally Posted by MassNerd

Source was automotive journalists at the recent Supra press event in Texas asking about reliability and getting the answer about teardowns.

Yeah, I can't remember which reviews that came out of, but it's been reported multiple places after the press events.

Edit: I know I watched this video, but I haven't double-checked his sources, so I may be talking out my (his?) ass.
8:22 9:06