Hi everybody,

I have a 1997 Nissan Altima with 26k miles on, and in pretty good shape.

I took it for a wheel alignment last week and after that I noticed a weird
symptom, that doesn't seem to have anything to do with the wheels.
Basically, when the engine is around 1500 rpm, the car starts to vibrate,
and the vibration seems to be coming from the front right side of the car,
but I can feel it everywhere, in my seat etc. This happens regardless of
whether it is in neutral or in gear, or if the car is in motion or
stationary. I took it to a Nissan repair shop and they suggested that it may
be one of the engine mounts, but the low mileage, and the fact that this
appeared only after a "wheel alignment" seems very suspicious to me. The
vibration doesn't happen at any other rpm.

First of all, what could be the cause for this, and how could it be fixed?
Secondly, could the guys at the alignment place have done something
(accidentally or intentionally) to cause this?

Thanks,

A