Date: Fri, 07 Jan 2000 20:32:32 -0500
From: Four Weis <mweinopsamcom>
Subject: Re: Shaking

If you can find a friend with a 900 who will let you borrow his wheels for a short test drive you can quickly determine if it is a problem with your tires/wheels. I am lucky enough to have three cars, so I have used this method in the past. The only sad part is the combined Blue book value of two of the cars is less than what I paid for my computer. wrote: > On Thu, 6 Jan 2000 22:36:24 -0700, "Christopher A. Nowell" > <> wrote: > > >My 87 900 recently started shaking when I get above around 120 km/h. I > >noticed that there was some snow around the disc brakes. I thought that > >could have been messing up the balancing or something. I removed the tire > >to empty it, and it didn't do anything. Any ideas? Please CC to: > > > > > > Sounds like tire balance, bent wheel, or tread separation. The latter > may be the most difficult to find unless you can find a shop that can > balance the tires while still mounted on the vehicle. Even a minute > separation of the tread/casing can cause wobble/vibration. Until the > tread visibly deforms, it is almost impossible to detect. Off vehicle > balancing may or may not show it. You can check for separation > yourself, but it is tedious work. Jack each wheel off the ground (not > all at the same time). Methodically "thump" each square inch of the > tread with an object like a heavy "end wrench" If you have > separation, it will sound like - boing, boing, boing, boing, thup, > boing. A "flat" sound (thup) will occur at the area of separation. > And, YES your neighbors will think that you have inhaled too many > exhaust fumes. > > -- > When a person delegates their responsibilities to another, that person loses the right to complain about the misuse of those responsibilities. -R. Shereda 1999

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