325i E93 Vibration at 60-67mph

bmwak · 09-13-2021, 10:44 AM

Hi All,

So I am at my wits end trying to chase a vibration-y/judder that can be felt throughout the car chassis. For record the car is 325I E93 vert.

I'd like to point out that it is not felt through the steering wheel or brake related and it continues even when the car is in neutral (its an auto).

It only happens between 60-67mph precisely and drives perfectly smooth thereafter or before those speeds.

As a process of elimination, I have done the following:

Replaced both wheels and tyres (no joy). Double checked wheel balancing
Overhaled propshaft coupling and centre bearing (was in good condition before changing).
Driveshaft and diff looks to be fine but there was slightly play on one driveshaft so replaced the pair too with new ones

Other things I did was clean the vanos solenoids, check coils and spark plugs (all recent). Injectors are all index 11.

The bushes look all fine with no out of the ordinary play but again this is not felt in steering or braking etc.

The only thing i've noticed is when the roof is down its not noticable, only when the roof is up. Is the roof known to have vibration / juddery sensation at those speeds?

Any pointers would be appreciated.

Phil325i · 09-13-2021, 11:29 AM

Engine mounts? Just a thought, as you've tried most of the obvious causes...

therealdb1 · 09-13-2021, 11:49 AM

In addition to Phil's suggestion I had a Supercharged Jag once that did the same sort of thing. Took me about 3 years to find the culprit!

.... Oh you want to know what it was? The gearbox mounting was shot (it had an integral damper) and at a certain speed would shake the whole car to pieces.

0l0dom0l0 · 09-13-2021, 03:05 PM

Engine and gearbox mounts would be the next thing.
Could also be a wheel bearing.

OliSharp · 10-18-2021, 06:03 PM

I know you said the wheels are balanced, but I'd still suggest checking they're actually round, with a dial gauge.

Is it the roof rattling? I've been in a few E93s that rattle at motorway speeds

09-13-2021, 10:44 AM	#1
bmwak Major 113 Rep 1,235 Posts Drives: 440i M-Sport Gran Coupe Join Date: Sep 2008 Location: London iTrader: (4)	325i E93 Vibration at 60-67mph Hi All, So I am at my wits end trying to chase a vibration-y/judder that can be felt throughout the car chassis. For record the car is 325I E93 vert. I'd like to point out that it is not felt through the steering wheel or brake related and it continues even when the car is in neutral (its an auto). It only happens between 60-67mph precisely and drives perfectly smooth thereafter or before those speeds. As a process of elimination, I have done the following: Replaced both wheels and tyres (no joy). Double checked wheel balancing Overhaled propshaft coupling and centre bearing (was in good condition before changing). Driveshaft and diff looks to be fine but there was slightly play on one driveshaft so replaced the pair too with new ones Other things I did was clean the vanos solenoids, check coils and spark plugs (all recent). Injectors are all index 11. The bushes look all fine with no out of the ordinary play but again this is not felt in steering or braking etc. The only thing i've noticed is when the roof is down its not noticable, only when the roof is up. Is the roof known to have vibration / juddery sensation at those speeds? Any pointers would be appreciated.
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09-13-2021, 11:29 AM	#2
Phil325i Brigadier General 645 Rep 3,227 Posts Drives: E92 325i MSport Coupe Join Date: Apr 2012 Location: UK South East iTrader: (1) Garage List 2009 BMW 325i Coupe [6.00]	Engine mounts? Just a thought, as you've tried most of the obvious causes... __________________ E92 pre-LCI 325i - Ohlins R&T; H&R spacers; M3 strut brace; Swift thrust sheets; 3 x chassis braces; diff brace; N53 V-brace; 034 subframe inserts; BMS clutch stop; BMS CDV; RE g/box mounts; Delrin shift bushes; Saikoumichi OCC; Cyba scoops; BMW Perf Exhaust; HEL s/steel brake hoses; M3 rear spoiler; Recaro Sportster CSs; M3 white dash LEDs; LED Angels; LED side repeaters; BMW Perf black grille; CSL reps; SSDD carbon diffuser; Monster Wrap black roof/clear front
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09-13-2021, 11:49 AM	#3
therealdb1 Lieutenant 106 Rep 575 Posts Drives: Graphite E93 335i Join Date: Aug 2017 Location: Norfolk UK iTrader: (0)	In addition to Phil's suggestion I had a Supercharged Jag once that did the same sort of thing. Took me about 3 years to find the culprit! .... Oh you want to know what it was? The gearbox mounting was shot (it had an integral damper) and at a certain speed would shake the whole car to pieces. Last edited by therealdb1; 09-13-2021 at 05:31 PM..
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09-13-2021, 03:05 PM	#4
0l0dom0l0 First Lieutenant 71 Rep 318 Posts Drives: BMW E92 330i Join Date: Jun 2020 Location: Uk iTrader: (0)	Engine and gearbox mounts would be the next thing. Could also be a wheel bearing.
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10-18-2021, 06:03 PM	#5
OliSharp Private 9 Rep 61 Posts Drives: E93 330i Highline MSport Join Date: Jan 2019 Location: SW London iTrader: (0)	I know you said the wheels are balanced, but I'd still suggest checking they're actually round, with a dial gauge. Is it the roof rattling? I've been in a few E93s that rattle at motorway speeds
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