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      04-24-2014, 01:11 AM   #1
grimm7302
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my 2012 328i sounding like a diesel engine

Hey Gang I have a question for the forum, I have 328i f30 and right now she sounds like a diesel engine, I have taken her to two different bmw dealerships here in Germany and they keep saying that it is normal wich I am not buying , usually the things that make 4 bangers sound like this are 1) being low on engine oil which I checked ,, double checked and triple checked , using cheap gas .. which I only use 93 so what else could make it sound like this , this is becoming increasingly frustrating
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      04-24-2014, 01:32 AM   #2
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True sounds like a diesel.
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      04-24-2014, 05:54 AM   #3
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Sounds more like a diesel than some of the diesels when on tick over, but not so at higher revs
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      04-24-2014, 10:23 AM   #4
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I do believe this is normal for direct injection engines, especially during cold start. Once it warms up though it should essentially subside.
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      04-24-2014, 10:25 AM   #5
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Completely normal. I listened to 3 on my test drives.
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      04-24-2014, 10:59 AM   #6
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put an M performance exhaust and byebye diesel sound
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      04-24-2014, 11:02 AM   #7
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Quote:
Originally Posted by mysticwizard View Post
put an M performance exhaust and byebye diesel sound
doesn't change the sound under the hood.
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      04-24-2014, 11:43 AM   #8
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thanks for the advice gents
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      04-24-2014, 01:10 PM   #9
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Totally normal. Direct injected 4 bangers sound surprisingly loud and clackety-clackety. If you really think it sounds like a diesel, go listen to a 328d. You'll probably think that sounds like a farm tractor.
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      04-24-2014, 01:28 PM   #10
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Yeah, sounds like a diesel but doesn't have the torque of a diesel
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      04-24-2014, 02:25 PM   #11
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I thought that is how all N20s sound like, which is one of the main reasons I went with the 335, the engine sound is much more satisfying. That and the fact that in Canada you could not get Msport on a 328.
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      04-25-2014, 08:10 AM   #12
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Quote:
Originally Posted by grimm7302 View Post
using cheap gas .. which I only use 93 so what else could make it sound like this ,
European 93 (RON) is quite low for this engine.
I would use atleast 95 RON with many European counties offering 98 RON.

In the USA 93 is fine, because they use a different measuring system ([RON +MON]/2) So US 93 is generally as good or better than Euro 95.
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      04-25-2014, 08:12 AM   #13
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diesel engines usually are turbo direct injection. so are these engines.
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      04-25-2014, 08:14 AM   #14
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i believe the bosch fuel injectors are to blame
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      04-25-2014, 08:31 AM   #15
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As all have said: totally normal.

If you look back at 2-3 year-old threads, there were several that complained about the noise when the engine first came out.

Also, as one mentioned, you should be using 95 or 98 RON gasoline if you're in Europe, as there is a different measuring system. The book says 89 minimum, which is the USA/CA AKI that is similar to 95 in EU.

One further note: the under-hood sound/heat insulation pad was removed from petrol (gasoline) engined cars prior to 2010 as a cost saving measure. Have a dealer order one and install it.
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      04-25-2014, 10:51 AM   #16
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it is 93 octane that use on post here.
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      04-25-2014, 11:49 AM   #17
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Quote:
Originally Posted by floydarogers View Post
As all have said: totally normal.

If you look back at 2-3 year-old threads, there were several that complained about the noise when the engine first came out.

One further note: the under-hood sound/heat insulation pad was removed from petrol (gasoline) engined cars prior to 2010 as a cost saving measure. Have a dealer order one and install it.
Will they do that as a "customer satisfaction" type of deal or is it one of those "let's stick the buyer with an over-priced item that should have been installed at the factory?"
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      04-26-2014, 01:59 AM   #18
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Quote:
Originally Posted by kent11202 View Post
Will they do that as a "customer satisfaction" type of deal or is it one of those "let's stick the buyer with an over-priced item that should have been installed at the factory?"
My guess is not.
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      04-26-2014, 01:49 PM   #19
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Quote:
Originally Posted by kent11202 View Post
Will they do that as a "customer satisfaction" type of deal or is it one of those "let's stick the buyer with an over-priced item that should have been installed at the factory?"
Sorry guys, I really need to check things out BEFORE posting - duh! Anyway, I just popped the hood and there IS a sound-deadening pad attached. Maybe there's a SUPER sound-deadening pad? Not going to bother - the rattling type noise dissipates once the engine is warmed up anyway.
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      04-26-2014, 04:34 PM   #20
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Quote:
Originally Posted by Damn Dirty Ape View Post
doesn't change the sound under the hood.
No, but it does sound a lot better in the cabin. I had MPE on my 328 and it was much better than stock.
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      04-27-2014, 04:52 AM   #21
grimm7302
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my sound actually gets louder after the engine warms up
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      04-27-2014, 04:54 AM   #22
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right now I am using 5w30 should I go to 0w 30 on the oil?
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