Tapping noise after service station replaced Crankshaft Sensor
My 2006 Buick Lucerne has 110,000
miles on it. I’ve owned it 10 years
and pampered it. Runs good, looks
great. It began stalling at low RPM.
Buick dealership was evidently
correct in saying that the Crankshaft
Sensor was the likely problem, as I
experienced no more stalling after
replacing with new Duralast sensor.
However, immediately thereafter I
noticed a tapping noise that becomes
inaudible after the engine warms up.
The service station that did the
replacement labor used a
stethoscope today and determined
that the tapping noise is indeed
coming from the area of the
Crankshaft Sensor, and that the noise
is actually still there after the engine
warms up, just much quieter. They
said the Harmonic Balancer might be
the problem, but I’m skeptical of that
diagnosis. Quoted $260 for GM part
from the Buick dealer and $110 labor.
Any thoughts on all this ?