'Diesel' sounding engine rattle on 545i start-up
06-23-2007, 09:28 AM
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My Ride: 2005 BMW 545i / Black Sapphire Metallic / 6spd. manual / Sports package
Can anyone help me out here? My 545i runs, idles and starts smooth, but occasionally I get this rattle/clatter sound from the engine upon start-up, that makes the car sound like some horrid old diesel engine in the Mercedes my mom used to own years back. Upon shut-off I've always had a 'clatter' but I've learned to live with that, but this start-up clatter is really weird. It's not related to cold-starting as it never has happened then. But it'll just happen randomly in the afternoon/evening. Is this something I should be concerned about?
06-23-2007, 09:31 AM
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Not normal. Take it in for servicing. I've never had a clatter on start-up nor shut-off.
06-23-2007, 09:42 AM
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Originally Posted by vegastrashed' post='439051' date='Jun 23 2007, 08:31 PM
Not normal. Take it in for servicing. I've never had a clatter on start-up nor shut-off.
The sound you discribed may come from the valves.
The engine computer is malfunctioning.
Hope your warranty is OK.
06-23-2007, 09:44 AM
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Originally Posted by vegastrashed' post='439051' date='Jun 23 2007, 10:31 AM
Not normal. Take it in for servicing. I've never had a clatter on start-up nor shut-off.
06-23-2007, 09:46 AM
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Originally Posted by Ricracing' post='439054' date='Jun 23 2007, 10:42 AM
Yes, your car needs to see the doctor at once!
The sound you discribed may come from the valves.
The engine computer is malfunctioning.
Hope your warranty is OK.
The sound you discribed may come from the valves.
The engine computer is malfunctioning.
Hope your warranty is OK.
06-23-2007, 09:51 AM
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My Ride: 2005 BMW 545i / Black Sapphire Metallic / 6spd. manual / Sports package
Okay, I just went back out to the car and did a start/shut-off numerous times and it's fine. I'm only getting the clatter at shut-off.
I have a feeling that my local BMW dealer is just going to tell me that 'there is nothing wrong with it and that everything is normal' since I can't replicate the sound every time.
I have a feeling that my local BMW dealer is just going to tell me that 'there is nothing wrong with it and that everything is normal' since I can't replicate the sound every time.
06-23-2007, 09:57 AM
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Didn't mean to scare you superhung, sorry.
But be realistic, if it sounds like an cold diesel it's the valves touching something they shouldn't.
I still say it's the computer that does the engine stearing.
Do not drive the car until you get it fixed.
Does the engine have enough oil?
But be realistic, if it sounds like an cold diesel it's the valves touching something they shouldn't.
I still say it's the computer that does the engine stearing.
Do not drive the car until you get it fixed.
Does the engine have enough oil?
06-23-2007, 10:07 AM
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Originally Posted by Ricracing' post='439063' date='Jun 23 2007, 10:57 AM
Didn't mean to scare you superhung, sorry.
But be realistic, if it sounds like an cold diesel it's the valves touching something they shouldn't.
I still say it's the computer that does the engine stearing.
Do not drive the car until you get it fixed.
Does the engine have enough oil?
But be realistic, if it sounds like an cold diesel it's the valves touching something they shouldn't.
I still say it's the computer that does the engine stearing.
Do not drive the car until you get it fixed.
Does the engine have enough oil?
It really doesn't sound THAT bad as my original post may've mislead. It really only happens very rarely and the rattle is not that audible to the point you're like 'what the hell is that?'. I have a sensitive ear when it comes to my own cars so that may be a part of the thing. I flinch at every 'not normal' noise I can hear coming from the car. The rattle can be described more like a quick rattle as if the engine is not tightened down. The car itself is super smooth (start,idle,running) the rest of the time. When I shut-off the car, it's the same thing, but all the time. The car rattles a little.
I checked the engine oil and it is fine.
06-23-2007, 10:19 AM
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Originally Posted by superhung' post='439064' date='Jun 23 2007, 11:07 AM
Yeah, you're scaring me
It really doesn't sound THAT bad as my original post may've mislead. It really only happens very rarely and the rattle is not that audible to the point you're like 'what the hell is that?'. I have a sensitive ear when it comes to my own cars so that may be a part of the thing. I flinch at every 'not normal' noise I can hear coming from the car. The rattle can be described more like a quick rattle as if the engine is not tightened down. The car itself is super smooth (start,idle,running) the rest of the time. When I shut-off the car, it's the same thing, but all the time. The car rattles a little.
I checked the engine oil and it is fine.
It really doesn't sound THAT bad as my original post may've mislead. It really only happens very rarely and the rattle is not that audible to the point you're like 'what the hell is that?'. I have a sensitive ear when it comes to my own cars so that may be a part of the thing. I flinch at every 'not normal' noise I can hear coming from the car. The rattle can be described more like a quick rattle as if the engine is not tightened down. The car itself is super smooth (start,idle,running) the rest of the time. When I shut-off the car, it's the same thing, but all the time. The car rattles a little.
I checked the engine oil and it is fine.
06-23-2007, 10:35 AM
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Originally Posted by Hormazd' post='439067' date='Jun 23 2007, 11:19 AM
Yeah you mislead us. I just noticed its a six speed. When you turn off the engine the tranny shakes and knocks against the body. Told it was normal by several dealers.