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Read the WELCOME ALL BMWFANATICS post.
2010 320d LCI Engine update
- Thread starter Mrcloc
- Start date
tman said:
I've lost sleep over this. I gave a very good description - the suspension feels very different to my previous 2 E90's and it feels like it dives a lot when braking (I believe it's due to the brand new rear disks if anything). The interference is very apparent, although it seems the guy looking at it didn't bother. For the noise when switching off and the gearbox, I didn't ask if they were faulty, I asked if the noise and behaviour were normal (because it's different to my previous 2 E90s).
I asked if the software update was available and if so how does motorplan cover it.
For the questions, the technician just has to listen to the noise, test drive the car and run a diagnostic on the suspension. And they did have a look at everything luckily, so now I have the peace of mind that all's well mechanically.
AshG108 said:
Thanks. My previous 2 had the same size wheels, but this one was sold originally with 17" wheels (although I would be amazed if BMW actually fitted different suspension for different sized wheels).
Interestingly, though, I did have a look at the tyres to make sure they were RFTs... The front tyres are Pirelli P7s, so maybe they just act differently to the PremiumContact 2's I've always had on my cars in the past. Also, when I got the car and noticed the diving, the tyres were at 1.8. I got used to the braking before I noticed the low pressure, so it could have been compounded by softer tyres, low pressure and brand new rear disks.
The problem with how the car brakes is that even though I'm used to it, it's really on and off. I think it will get better as the brakes settle in and the new disks settle in.
michaelniszl
///Member
Fifth BMW said:
Rather start your on thread, don't troll on someone elses :thumbs:
tyronzn
New member
Mrcloc said:
they correct on the 6-9 hours for software upgrade,ISIS takes a helluva long time even just reading the car and the rest is the upgrade.When i last enquired at Ballito Autohaus they quoted me R650 as it only entails 1hr worth of labour,the rest of the time the car is sitting on the floor.After few articles ive read about software upgrade it also updates head unit which is not something i wanted but unfortuantely the dealers dont have a choice,ISIS updates the whole lot.
I stand to be corrected but after some reports ive read approximately 2 in every 20 cars head units stop working after an upgrade,with my sort of luck i would be one of those 2.
I've been waiting for a quote on the update. The guy at Menlyn has now forgotten for the second time. I'll give him another call later, and if I get no response again, I'll call someone else.
In addition to waiting for the quote, I remember having an email conversation with someone at a dealership once about updating my 05 model. He said there wasn't an update for the 120kW version (115kW?), but there was one for the 130kW version. So it seems the update is available for my engine and it is valid.
I feel I must speak to someone who knows a lot because I see that the 135kW version is the N47D20O1 and the 130kW version is the N47D20O0. The difference seems to only be the compression ratio - 16:1 vs 16.5:1. This would explain the improvement in fuel economy. I'm not an expert, but since the bore and stroke are the same, to change the compression ratio, the crankshaft should be different. So updating the software might give a bit more power and torque, but the fuel consumption can't change by much. Does this make sense?
I've also heard that longer pistons (or connecting rods) can change the compression ratio. How?
In addition to waiting for the quote, I remember having an email conversation with someone at a dealership once about updating my 05 model. He said there wasn't an update for the 120kW version (115kW?), but there was one for the 130kW version. So it seems the update is available for my engine and it is valid.
I feel I must speak to someone who knows a lot because I see that the 135kW version is the N47D20O1 and the 130kW version is the N47D20O0. The difference seems to only be the compression ratio - 16:1 vs 16.5:1. This would explain the improvement in fuel economy. I'm not an expert, but since the bore and stroke are the same, to change the compression ratio, the crankshaft should be different. So updating the software might give a bit more power and torque, but the fuel consumption can't change by much. Does this make sense?
I've also heard that longer pistons (or connecting rods) can change the compression ratio. How?
Mrcloc said:
To answer my own question - bore and stroke determine engine capacity, so longer pistons will still have the same bore and stroke, but more compression.
Skimming the head and installing a thinner gasket will also do the trick. Changing the crankshaft will increase the stroke, so that's not how compression is changed. I feel enlightened!
