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5-Series (E12,E28, E34, E39, E60) Chat relating to the BMW 5-Series of all generations. Specific models include: BMW 518, BMW 520, BMW 520i, BMW 530i, BMW 528i, BMW 530i, BMW 518i, BMW 524d, BMW 525i, BMW 525e, BMW 528e, BMW 540i, BMW 535i, BMW 520d, BMW 525td, BMW 525d, BMW 530d, BMW 525i/xi, BMW 530i/xi. (BMW 5-Series Forum)

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Old 03-31-2008, 03:27 AM   #1 (permalink)
n00b
 
Join Date: Mar 2008
Location: Nottingham, UK
Car: 1998, 540i
Posts: 2
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oggierock is on a distinguished road
Red face e39 540 shuddering at low revs

Hello all,

I have just purchased a 1998 540i at the weekend, which seemed to be in very good nick for the money. I havent picked it up yet cus its having an MOT done, and a valet.

However I have one small concern, and I have taken a bit of a gamble with the purchase on it, because everything else seemed so good (especially the throaty roar).

I noticed when accelerating at low revs, upto about 2500rpm there was a slight shuddering throught the car. It felt as if the engine was missing a mounting or something. Upon reaching higher revs, it stopped completely.

Can somebody give advise on what it could be and what might be the fix. I hope its nothing major, jike a new auto gearbox. Fingers crossed, we all take a bit of a leap of faith with buying second hand cars, hopefully mine has been sound.

cheers guys

Paul
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Old 04-03-2008, 12:50 AM   #2 (permalink)
5th Gear Member
 
Join Date: Sep 2003
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sp0rky is an unknown quantity at this point
It COULD be the auto transmission, but isn't too likely.
Check to see if it does it in all gears or just one.

Most likely the issue is a flex disc, u-joints or center bearing. They are all related.

Check the connection of the driveshaft to the transmission and check for cracks, hardness and / or strings hanging from the joint.

The piece should be completely free of cracks and somewhat flexible.
Driveshaft components tend to vibrate at around 2500rpm in any gear.
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Old 04-03-2008, 06:44 AM   #3 (permalink)
n00b
 
Join Date: Mar 2008
Location: Nottingham, UK
Car: 1998, 540i
Posts: 2
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oggierock is on a distinguished road
cheers mate.

I will have a look. I pick the car up next weekend, and I`ve opted to get an inspection service with a local bmw specialist just for peace of mind and a general check while the car is in warranty. I will pass on your suggestions as key areas to check.

I`ll keep my fingers crossed it isnt the auto box.

Nice looking ride you have there, risky on the exit from your drive, in scraping your front splitter/bumper. A few arse pursing moments im sure on that one.

cheers
Paul
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