Last post on Feb 17, 2013 at 10:00 AM
You are in the BMW 7-Series
What is this discussion about?
BMW 7 Series, Electrical, Engine, Sedan
#12 of 832 Im sorry if i have upset you
Jan 30, 2004 (9:45 pm)
After buying an 80,000 dollar car i would like someone a little more prone to work on my car. There is a difference between the 93 and 00 correct me if I'm wrong but they only made one type 750 in 93 thats the iL. On my BMW and from what i take on Mge's 1999 BMW we have the navagational System which for some reason is slightly more complicated than the radio... Read the Manual Mge.
I am completely terrified to do simple projects on my cars and trucks. Thats why I have a 1994 LandCruiser that i have put a lift kit, Kumara Turbo Charger, and rear differential lockers on it with no help from any service department besides the one that i purchased the hard wear from.
I have owned a 318 i (88-90) 535i (90-2000) and currently a 740iL (2000-present) I take pride in the BMW's that I have owned and would not want to screw anyone elses up.
For all we know disconecting the battery might not do a hill of beans. Mge just shoot you local dealer an e-mail, they might beable to tell you in a response
#13 of 832 1997 740il a little shakey
Feb 01, 2004 (12:31 am)
I bought my 97 740il a little over a year ago and have begun noticing that it sometimes shakes a bit when I brake at about 40-50 mph. It still drives really smooth at high speeds, but this shaking is frieking me out. Any thoughts before I go to the dealer? Thanks!
Feb 01, 2004 (6:29 am)
That's usually the symptom of a warped brake rotor. Any shake in the steering wheel under braking?
Feb 01, 2004 (10:17 am)
How many miles does it have on it? alcan is mostlikly right, you can try this but because its a BMW i would doubt that you would feel anything,,, Ok when slowing down at a stop sign / light push the brakes a little harder than usually but not to a skid, and see if you can feel any response in the peddle, If you do then it is the rotors. Also check your brake fluid. Do you drive the BMW like a sports car or like a regular around town car?
Feb 01, 2004 (12:36 pm)
Thanks for the quick responses alcan and tlcman -
I tried what you suggested tlcman and didn't feel anything in the peddle. The shaking/vibration also sometimes occurs when I'm on the accel, but only right around 50mph - any faster or slower and it's pretty smooth - and it doesn't occur on all roads, definitely a strange problem. Someone who had a similar problem thought it may be a balancing issue (I recently went with new 18" M-parallel wheels with Conti sport tires) and suggested I get "centering rings." What are those? Any thoughts? Thanks guys.
Feb 01, 2004 (1:12 pm)
If you have aftermarket wheels on it, that could easily be your problem. If you still have the old wheels, put them back on and try it. I'll bet the problem goes away. If it's not the wheels, or one of the wheels, it could be one of the new tires. A front to back rotation would prove that out for your.
The steering is very sensitive on the 7-series, and any imperfection in balancing or roundness can be detected at the critical speed. As expensive as they are, many aftermarket wheels are not well balanced or round like the factory wheels are.
Feb 01, 2004 (1:59 pm)
If the problem is that the wheels are not round, what's the fix?
Feb 01, 2004 (3:10 pm)
Different wheels...See if you can take them back and exchange them, or find the one that's bad and demand a replacement maybe? If they're all goofy, get another brand. Frankly, on a car that precise, I see this a lot. There's nothing better than the factory wheels on a BMW for true handling. On a Chevy, you'll never notice, but on the BMW, any little imperfection will be magnified.
#20 of 832 Vibration/Shaking at 50 mph
Feb 02, 2004 (12:14 pm)
My 2000 740iL (18" M-Parallel wheels) recently developed a similar problem while driving (not braking). I know I was on my way to needing new tires, but did not notice a balance problem at any other speed. Also, on one ocurrence, I hit a small bump while accelerating onto the interstate. The wheel began to shake pretty violently until I hit about 60 mph. Pretty similar to headshake for any motorcyclists out there.
I checked with my local high-performance tire dealer who told me he sees this problem frequently on BMW's when the mileage starts to creep up. Normal wear on the suspension/steering components make them extremely sensitive to tire wear patterns, balance and quality. I replaced the tires (Pirelli PZero Rosso's) last week with Michelin Pilot Sport A/S. Presto, no more problem! I will say that the steering does indeed feel "looser" than it did at lower miles. Anyone know of an adjustment that reduced free-play in the steering?
If you 18" wheels are not OEM, make sure they are "hub-centric", or fit snugly around the hub or dust cap. If there is any free play, you'll never get the wheels to stay in balance as they actually shift on the hub. I had this problem with some beautiful Centerline wheels on my Suburban, and Centermine did not make a centering ring for a good fit. Ended up replacing them with Axis wheels which are hub-centric and no more problems.
For anyone contemplating new tires for the 18" wheels, steer clear of the Pirelli's. They rode beautifully when new and were much quiter than the Michelin's. However by 6k miles they began to cup and get extremely noisy. The dealer rotated them (side to side) which did not help at all. At 12k miles the noise was intolerable and embarassing. Also, the rear tires were worn to the center bars. No better experience with the Continentals either!
#21 of 832 i had that problem with my continental Sticky Snow tyres
Feb 02, 2004 (4:12 pm)
But before you replace your tyres check your air pressure. Make sure that it is correct. I had a similar problem with my old 535 i and it turned out to be low tyre pressure, and it created a very distinct wear pattern.