- Buick Ownership
- 2007 Lucrene, 2004 LeSabre
Balance shaft 2007 3.8 v-6 problems
Going down the road, as your cruising there will be a vibration, not thru the steering wheel but you feel it in the body. Have been all thru suspension ,new tires. It feels like it comes on when you let off a little or go downhill. Motor runs great, no vibration when idling. Also does not happen till vehicle warms up. A slight vibration, sometimes a little harder. Its a 2007 Lucerne 125,000 mi. wondering about balancer shaft in motor?Not to clear on the question. Are you asking if it could be a balance shaft vibration or you know it's a balance shaft and more information. Additional details may help others to offer suggestions also.
Just got car. Had new plugs in it , new brakes and rotors. I replaced lower control arms because bushings were wore out , replaced both. It has a junkyard top arm motor mount, so evidently this is an ongoing problem. There is no noises when it shutters or at any other time. No damage to cradle that I can see and no obvious tire wear. Struts have been replaced by GM dealer with GM struts. I am second owner, checked car fax was regularly serviced by Dealer. Checked over motor mounts see no leaking or obvious signs of problems. I'm a old hand with these full size Buicks , owning several and working in the engine plant and final assembly in Flint. I must be getting old, because this problem is stumping me, and I hate to be a parts changer. But will if I have to be. ThanksDepending on maintenance, plugs, wires, brakes etc could be a factor. Here's a link on engine noises which may help.
The engine and trans mounts are also known to be a problem area which may cause a vibration, something else to check. Without feeling it via the forum it's a little hard to pinpoint what exactly it may be, but you may get some more ideas where to check.
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