[Luftwaffe1O1]

I think they will retain the M badging, and probably bump in power. The entire debut of the M235i (and in this case the LCI) was catered at a lower budget enthusiast car with the spirit of the older cars. The 235i started life as an M performance model, I doubt they would neuter it midway through production as far as marketing goes.

Even with a 330 or 335hp M240i model, it will still lag enough behind the M2 for it to be a distinct model in the lineup.

The M2 is not all about straight speed and power, as far as suspension and brakes etc is concerned it is more M4 than it is 235. It just has a weaker power plant. So even if the power was very close, the M2 is still a distinct enough car to warrant its own market share. Especially if the MSRP stands true, and it is really not far in price from the 235 currently.

[///MWorkin]

Probably just a tiny bump in HP and some changes in standard equipment as some have already stated.

[ShakingTwoTrees1960]

Any truth to the suggestions that the 2018 M240i with the new B58B30M0 engine will successfully resolve, or at least reduce, the valve stem carbon build-up issues that seem unavoidable on direct-injection engines? If so, I'd consider waiting for the new motor for this reason alone.

[BEM-S4]

Hoping for different wheels. I hate mine even when they're not bent or cracked, which isn't often.

[G8rGrl]

According to the other threads on this forum the model year 2017 vehicle will change from 235 to 240. That means it will probably be in the dealership the same time as the other model year 2017 cars: August 2016 or September 2016.

[brennok]

Isn't the 240 also supposed to bring CarPlay/Android Auto? I thought that was one of the other rumors.

[shark715]

Originally Posted by ShakingTwoTrees1960

Any truth to the suggestions that the 2018 M240i with the new B58B30M0 engine will successfully resolve, or at least reduce, the valve stem carbon build-up issues that seem unavoidable on direct-injection engines? If so, I'd consider waiting for the new motor for this reason alone.

Is this an issue with the current M235 engine? I had not heard that.

[ShakingTwoTrees1960]

Originally Posted by shark715

Is this an issue with the current M235 engine? I had not heard that.

From what I've been reading in my new-vehicle research, all direct-injection engines suffer from progressive carbon build-up at the base of the valve stems to some degree. As I understand it, since there's no over-valve fuel flow to aid with cleaning as in port-injected engines, carbon progressively builds up on the valves of direct-injected engines which will require periodic cleanings to restore original engine power, smoothness and efficiency. Apparently, the installation of a catch can may help delay the onset of severe carbon build-up symptoms, but there is no preventive measure and eventual abrasive media blasting will be required to remove the carbon deposits. Are there any high-mileage M235i owners out there detecting rough idle, power loss or reduced fuel economy that might be attributable to carbon build up?

[shark715]

Originally Posted by ShakingTwoTrees1960

From what I've been reading in my new-vehicle research, all direct-injection engines suffer from progressive carbon build-up at the base of the valve stems to some degree. As I understand it, since there's no over-valve fuel flow to aid with cleaning as in port-injected engines, carbon progressively builds up on the valves of direct-injected engines which will require periodic cleanings to restore original engine power, smoothness and efficiency. Apparently, the installation of a catch can may help delay the onset of severe carbon build-up symptoms, but there is no preventive measure and eventual abrasive media blasting will be required to remove the carbon deposits. Are there any high-mileage M235i owners out there detecting rough idle, power loss or reduced fuel economy that might be attributable to carbon build up?

Based on what I've read on the Audi owner forums this seems to be a significant issue on Audi 4 cylinder engines, with owners seeing problems as early as 30-40k miles. When did BMW start using direct injection on their 6 cylinder motors?

[Brix]

Although the closed deck design of the B58 is a tempting feature. I think the N55 from the M235 shares more DNA with the M2 and is quite tuner friendly to boot. this is very reminiscent to when BMW switched from the N54 to N55 on the 1 series but retained the N54 for the 1M.

Sometimes the newest engine from BMW is not the one to have. Hence BMW kept the old engine design in the 335is as well where the 335i had the pretty tame N55 in it. Don't forget that the M235 N55 30O0 has a steel crankshaft and is a cut above the standard N55 30M0 in the 335i and 345i which has a cast crank. So, the B58 is definitely an improvement over the n55 30M0 (335/435) but questionable if it will be better than N55 30O0 M235.

So the one thing I would question is... why if the B58 is a better motor, are they retaining the N55 for the M2?

[scrape1]

Originally Posted by shark715

Based on what I've read on the Audi owner forums this seems to be a significant issue on Audi 4 cylinder engines, with owners seeing problems as early as 30-40k miles. When did BMW start using direct injection on their 6 cylinder motors?

Uh, 2006 (N54)

[shark715]

Originally Posted by scrape1

Uh, 2006 (N54)

So I assume there are plenty of high mileage BMW 6 cylinder direct injection motors out there. Have the carbon build up problems on these engines been widespread (like they seem to be on the Audi 4's)?

[scrape1]

Originally Posted by ShakingTwoTrees1960

From what I've been reading in my new-vehicle research, all direct-injection engines suffer from progressive carbon build-up at the base of the valve stems to some degree. As I understand it, since there's no over-valve fuel flow to aid with cleaning as in port-injected engines, carbon progressively builds up on the valves of direct-injected engines which will require periodic cleanings to restore original engine power, smoothness and efficiency. Apparently, the installation of a catch can may help delay the onset of severe carbon build-up symptoms, but there is no preventive measure and eventual abrasive media blasting will be required to remove the carbon deposits. Are there any high-mileage M235i owners out there detecting rough idle, power loss or reduced fuel economy that might be attributable to carbon build up?

The car has barely been in production for 2 years. It would be pretty hard to find a car with over 50k miles. There are moderately high mileage 335 owners who report mild carbon build up. N55 reportedly runs cleaner than the N54 thanks to a breather system that allows less blow by.

Still, consider valve cleaning expected maintenance and expect to do it once or twice over the life of the car, if you keep it past the warranty period. It's really not that expensive and is somewhat offset by the fuel savings direct injection offers. Of all the things that can go wrong with a BMW, this one is far from something to lose sleep over.

[scrape1]

Originally Posted by Brix

Although the closed deck design of the B58 is a tempting feature. I think the N55 from the M235 shares more DNA with the M2 and is quite tuner friendly to boot. this is very reminiscent to when BMW switched from the N54 to N55 on the 1 series but retained the N54 for the 1M.

Sometimes the newest engine from BMW is not the one to have. Hence BMW kept the old engine design in the 335is as well where the 335i had the pretty tame N55 in it. Don't forget that the M235 N55 30O0 has a steel crankshaft and is a cut above the standard N55 30M0 in the 335i and 345i which has a cast crank. So, the B58 is definitely an improvement over the n55 30M0 (335/435) but questionable if it will be better than N55 30O0 M235.

So the one thing I would question is... why if the B58 is a better motor, are they retaining the N55 for the M2?

There is also the issue of the B series engines having the timing chain in the back of the engine, making replacement an engine out procedure. Maybe the Germans have finally figured out how to make a timing chain that doesn't stretch, but I won't be a guinea pig for the experiment. I know there are a few unhappy N47 and Mini owners whose lifetime chains weren't so lifetime.

Until an engine is proven by years of service, any guess as to long term reliability is just that.

[shark715]

Originally Posted by scrape1

There is also the issue of the B series engines having the timing chain in the back of the engine, making replacement an engine out procedure. Maybe the Germans have finally figured out how to make a timing chain that doesn't stretch, but I won't be a guinea pig for the experiment. I know there are a few unhappy N47 and Mini owners whose lifetime chains weren't so lifetime.

Until an engine is proven by years of service, any guess as to long term reliability is just that.

Stretching timing chains are also just one of the major issues with the N63 V8 engines too. BMW quietly recalled a huge number of them in the past year...well they didn't call it a recall, they called it a "customer care package" :-)

[scrape1]

Originally Posted by shark715

Stretching timing chains are also just one of the major issues with the N63 V8 engines too. BMW quietly recalled a huge number of them in the past year...well they didn't call it a recall, they called it a "customer care package" :-)

Supposedly that engine also eats batteries, and there is nothing that can be done about it other than frequent replacement. But it's still arguably better than at least one V8 from Audi

http://jalopnik.com/here-s-why-the-v...car-1676466510

[shark715]

Originally Posted by scrape1

Supposedly that engine also eats batteries, and there is nothing that can be done about it other than frequent replacement.

From what I've read (and I've read a lot on this as I'm one of the owners, who happens to be on his third battery after less than 4 years) BMW could change the software for the charging system, which is designed to prioritize fuel economy versus immediately recharging the battery. But if they did that, they would have to go back and change the EPA mileage estimates and speculation is they would have an owner class action lawsuit on their hands. This is in combination with a battery that has to run a coolant pump for quite a while after most engine shutdowns to cool down the two turbochargers sitting in the "V" between the two engine banks (could there be a hotter location for the turbos to be located?) So you have a battery that is rarely sitting in a fully charged state when the vehicle is not being used. Not a recipe for long battery life. Our X5 is now out of warranty, and whenever it's going to be sitting for more than a day or two, I throw it on the battery tender.

[ShakingTwoTrees1960]

Originally Posted by scrape1

The car has barely been in production for 2 years. It would be pretty hard to find a car with over 50k miles. There are moderately high mileage 335 owners who report mild carbon build up. N55 reportedly runs cleaner than the N54 thanks to a breather system that allows less blow by.

Still, consider valve cleaning expected maintenance and expect to do it once or twice over the life of the car, if you keep it past the warranty period. It's really not that expensive and is somewhat offset by the fuel savings direct injection offers. Of all the things that can go wrong with a BMW, this one is far from something to lose sleep over.

I tend to keep my new cars for 10-12 years, so I typically avoid being an early adopter and have had few problems. This will be my first BMW, so I'm investigating the reported high maintenance costs associated with these cars. Any feedback from experienced owners will certainly be welcomed before I potentially pull the trigger on my 2016 model order in January of next year.

[alexc93]

Originally Posted by ShakingTwoTrees1960

I tend to keep my new cars for 10-12 years, so I typically avoid being an early adopter and have had few problems. This will be my first BMW, so I'm investigating the reported high maintenance costs associated with these cars. Any feedback from experienced owners will certainly be welcomed before I potentially pull the trigger on my 2016 model order in January of next year.

Having had an 09 E series N54, 11 E series N55, and 14 F series N55, that I know my fair share about maintenance on these vehicles and for the most part it is simple stuff.

I have several friends with high mileage N54's. One of which is a 90k mile N54 which has been full bolt on and tuned for almost 60k miles, with slim to no problems.

I can't imagine the n55 will be any LESS reliable in the long run.

Enjoy it. Keep up with your oil changes, especially if tuning etc. Keep up with regular maintenance and you should be trouble free.

[Tpeterson]

Originally Posted by scrape1

The car has barely been in production for 2 years. It would be pretty hard to find a car with over 50k miles. There are moderately high mileage 335 owners who report mild carbon build up. N55 reportedly runs cleaner than the N54 thanks to a breather system that allows less blow by.

Still, consider valve cleaning expected maintenance and expect to do it once or twice over the life of the car, if you keep it past the warranty period. It's really not that expensive and is somewhat offset by the fuel savings direct injection offers. Of all the things that can go wrong with a BMW, this one is far from something to lose sleep over.

Mike Miller,the tech guy in Bimmer and Roundel mags,says there is less carbon build up in cars that are driven hard -enthusiasts- changing oil at 5K miles,using Top Tier gas, and putting BMW fuel system in the gas every 3K miles. This is what I am doing,but I might also need valve cleaning.

[scrape1]

Originally Posted by Tpeterson

Mike Miller,the tech guy in Bimmer and Roundel mags,says there is less carbon build up in cars that are driven hard -enthusiasts- changing oil at 5K miles,using Top Tier gas, and putting BMW fuel system in the gas every 3K miles. This is what I am doing,but I might also need valve cleaning.

All that stuff might help. Might not. Either way, I am not worried about a valve cleaning. I am more worried about stuff like my tuned engine deciding to grenade.