Engine noise - BMW M5 Forum and M6 Forums
M3 E36 1993-1999 Sedan, Coupe and Convertible (incl. SMG models)

 
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post #1 of 10 Old 9th June 2002, 10:11 PM Thread Starter
mikek
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Engine noise

Hello every1!

Now is it just me, or do M3's sound a little rattley and muted?

My car sounds rattly at the moment (exhaust not engine)

Now it is on its original exhaust (new CAT 1 yr ago) which has rotted through the outer skin on the underside. Is this the reason or do all M3s sound gruff?

When you compare it to the noise of a 328 or 325 it just cant compete on sex appeal!! And compared to the noise from the M5 it is a positively dull sound!!!

Thanks for replies in advance!
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post #2 of 10 Old 10th June 2002, 10:48 AM
Andy G
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mike

they can be a little rattly, and are not as smooth sounding as the 2.5/2.8, but I expect that's because of a more generous valve clearance I expect. But they sound a hell of a lot better than the 2.5's/2.8's when reaching their 7k limit, drop the rear windows, and give it some welly.........lovely. Also the M3 sounds nicer when you start to just pull away, deeper sounding, than the smoother creamy 325's etc
The exhaust is double skinned, so even if the outer layer is corroding, the inner should still be sound.
I've been driving a 328 every now and again, and got back into the M3 after a few days, and really notice the difference when driving, it's far better.

Hows it going though Mike, still like it?

AG
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post #3 of 10 Old 10th June 2002, 09:35 PM Thread Starter
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Andy,

I think the exhaust must be vibration on something...I will get it on the ramps at the weekend and look.!

Its like a resonance vibration sound at certain low revs.
Oh it still sounds awesome at 7K rpm!!

Oh yeah...I love it!!!! Got used to the steering too!

Also...is it possible to get the rear end out...I can only manage to get it to oversteer! Great fun though, especially on roundabouts!

The new Pilot sport tyres seem to be as grippy (if not more grippy) than the Yokohama A520's fitted previously.

Its all great fun though.....Even after my daughter wet herself in the front passenger seat!!! Yeah I was parked up too!! Thank god for leather seats and lots of kitchen roll!!!!(the smell has gone now before you ask!)
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post #4 of 10 Old 11th June 2002, 10:38 AM
Andy G
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Mike

get it on a damp road, give it a bit of right foot whilst turning, and the back will step out soon enough! easy to put back in line as well.
When you get it up on the ramp, check that the heat shields are not touching the exhaust, this can be a viable cause for the sound you're hearing.

AG
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post #5 of 10 Old 15th June 2002, 09:35 PM Thread Starter
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post #6 of 10 Old 7th July 2002, 11:47 PM Thread Starter
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After a recent trip to the dealer I was informed that the rattle I am getting from the engine is from the VANOS unit. Apparently these units all wear and start to rattle after a while?? I am dissapointed as my car has only 50K miles on it and I know how the car has been driven by the previous owner(very gently) because he is a friend of mine.

They told me that the VANOS unit is functioning ok though. A new unit is about £1000 to replace!!!! BUT they told me to leave it alone and that it will go on and on for another 100K miles before it wears out!

I will have to put up with it I guess! Unless I want to be a grand out of pocket! ....I dont!!

Bar that the car is super!
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post #7 of 10 Old 8th July 2002, 11:10 AM
Andy G
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Does it rattle all the time? or just when say cold?
I have heard owners with cars that have had their vanos replaced after only around 20k, and then again at around 65k so it's definatley a week point, the EVO being even worse in that respect. Thank god for a BMW warranty!!!

AG
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post #8 of 10 Old 8th July 2002, 08:27 PM Thread Starter
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Andy,

It is rattly at tickover more than at any other time. It makes no difference whether the engine is hot or cold.

I have heard that story before about the VANOS units, not sure who off though. The technician at Bowkers (Main agent) did say that the EVO's were worse, as you said. He also said that he had heard ones that sound "Miles noiseyer than yours"!!

I can live with it! Its just me been picky as the car is perfect apart from that. I always seem to start hearing noices a few months after buying a new car.....Probably in my head!

Besides that it still screams past 7000 rpm on a regular basis
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post #9 of 10 Old 9th July 2002, 11:09 AM
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Quote:
it still screams past 7000 rpm on a regular basis
good good, nice to hear it........................

AG
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post #10 of 10 Old 9th July 2002, 08:41 PM Thread Starter
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