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01-27-2017, 07:15 AM | #46 | |
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I've had mine around 200 miles. Hopefully they will calm down a bit but I also plan on raising the idle to 1k rpm BW said they were very surprised of the NVH at idle because they've sold many and don't have complaints. It's possible they have to break in a bit. |
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01-27-2017, 07:59 AM | #47 |
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Yeah, not nearly enough. The first few hundred miles are honestly not much fun at all and you'll think you made a big mistake but guaranteed, they will get better.
Also, the S65 had a bit of a harmonic vibration around 1,800 rpm plus minus and going through that range is particularly rough. |
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01-29-2017, 10:15 AM | #49 |
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Installed Vibratech Road mounts when I got my bearings done at 61k miles.
Like people said in this thread, you have to be concentrating or looking for added NVH to notice a difference. There is a slight, and I mean slight, increase through the steering wheel and chassis at idle. It actually makes you feel more connected to the car, you feel if the engine is under too much load or is happily revving. The time I can tell the difference between the mounts is the 1 sec during start up. The car and steering wheel shakes a bit more during start up and disappears after the engine fires up. I recommend the Vibratech Mounts, just make sure you buy the road, and not race version. |
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02-03-2017, 11:58 AM | #51 |
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I actually noticed a slight increase in NVH using OEM replacements at idle, which I remember from when the car was new. The squished and melted stock mounts may do a better job of damping out idle vibes at the expense of you know, not holding the engine in place at all
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06-08-2017, 12:36 PM | #52 |
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I replaced motor mounts on my 2008 as matter of course while having rod bearings replaced at 85k miles. They hadn't falled apart yet like xcuse_m3's photo above but had deep cracks and could be noticeably flexed just by hand. Just refreshing with stock mounts cured the driveline windup that was making it hard to shift smoothly (6MT). Based on my prior experience with other cars and hard motor mounts (too much NVH for a primarily-street car IMO, of course acceptable level for NVH depends on your use case and personal preferences/tolerance) I stayed with OEM mounts for my M3. 85k miles on stock mounts seems acceptable to me, I've had some cars which lasted longer and some shorter but the rubber stuff everywhere in the driveline and suspension is generally all shot by around 100k miles. I'm a recent owner of this car and I believe the previous owners drove it pretty gently so durability under extreme conditions I cant attest to.
the rod bearings yes were due to replace. Not so bad as "glad I didn't drive another mile" but worn through the plating on several bearings. Not fear mongering on the rod bearing topic, at close to 100k miles some maintenance needs to be done. the front tension strut rod bushings too, those have finite service life. (mine are now monoballs as part of my same 85k mile refresh) |
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06-18-2017, 01:12 PM | #53 | ||
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Drives: 'E46 M3 Race Car, '23 X7
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'23 X7
'04 M3 - Fall Line Motorsports Built Race Car - S65 swap, Dry Sump, Bosch Stand-Alone ECU, Drenth Sequential Trans, MCS 3-Way, Flossmann Wide Body, Brembo Motorsports Brakes, Drexler LSD, BBS E88 Etc. INSTAGRAM - @Slicer_M |
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06-18-2017, 01:41 PM | #54 | |
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With time they have broken in nicely Vibration is hard to notice at idle. Even then, it is very subtle. Not noticeable at all driving. All in all very happy with it. Will eventually replace the other M's motor mounts to these as well |
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06-18-2017, 07:58 PM | #55 |
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I have changed my motor mounts with every bearing change so far.
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'19 X3 M40 Carbon Black/Oyster, '23 Jeep Grand Cherokee L Summit, Past BMWs: '18 M550i, '18 330 GT, '16 X5 40e, '11 E90M3, '06 X5 4.4, '03 330i ZHP, '02 M3, '97 Z3 2.8, '95 M3 (2x), '94 530i (manual), '92 525i (manual), '88 M3, '87 325iS |
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02-14-2018, 01:38 PM | #57 |
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Yes fluid filled. When they get bad enough you will change them. A few people have suffered broken mounts. I changed mine when I did the rod bearings; nit sure if you can do them without at least lowering the subframe a bit — it may not need to be completely unbolted but you will want an engine support bar up top or maybe a hoist holding up the engine.
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02-14-2018, 05:14 PM | #58 | |
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02-16-2018, 05:03 PM | #59 | |
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02-21-2018, 03:00 PM | #60 |
Track? What Track? I was just riding along . . .
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I have a good friend who tracks his E92 M3 around 15 or 20 days a year, going hard on R comps. Five summers of that and about 40k miles total with no symptoms yet. But if he decides to do the rod bearings, he will put in new mounts.
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