Noise from left turn on 93 plymouth acclaim 3.0

[D]

My 93 acclaim makes a loud roaring noise when going around a left
curve at highway speeds. It sounds like the engine "amplified". In
other words the engine gets a lot louder when going around a left
curve. The sound changes when bumping the gas pedal. I believe it is
a motor mount, but not sure which one even if that is the problem. I
replaced the front one, it was very worn. When I'm cruising along and
take my foot off the gas I hear a high pitched buzz, whistling type of
noise. I don't know where that's coming from either. I've been to a
mechanic and he doesn't know what's wrong. I'm afraid these sounds
will lead to something serious later on. Thanks for information.

 

[Daniel J. Stern]

My 93 acclaim makes a loud roaring noise when going around a left curve
at highway speeds. It sounds like the engine "amplified". In other
words the engine gets a lot louder when going around a left curve.

My '91, first '92 and recently-purchased second '92 all did this. The
noise wasn't *loud*, but it was present. If yours is loud, it's because
the engine mounts are worn, off center, or both. The mounts on these cars
are not fixed; when certain bolts are loosened they allow the engine to be
shifted laterally by a surprisingly large amount. There is a procedure for
centering them properly, and this should be followed if you're to get
maximum life from your exhaust pipe-to-manifold junction/gasket (and
freedom from noises on left turns). Assuming your mounts are in good
condition -- which they may not be, given the car is over a decade old --
your engine is too far over to the right.

I replaced the front one, it was very worn.

OK, that means (a) the other two engine mounts and the rear transaxle
mount are probably similarly tired, and (b) you may not have realized the
importance of re-centering the engine after replacing any of the mounts.

When I'm cruising along and take my
foot off the gas I hear a high pitched buzz, whistling type of noise.
I don't know where that's coming from either.

That's your transfer gears in the transaxle's final-drive. Most of these
cars make this noise, and in most cases it is not at all loud. If it is
loud, it is either because sagged-out engine/trans mounts are allowing
contact between the engine/trans and the body, or because something is
seriously wrong with the transfer gears. Since the transfer gears usually
don't fail, I suspect the former.

DS

 

[D]

Daniel,

Thanks a lot for your information. It was very informative. I took
the car back to the mechanic and let him check the engine mounts
again. He said they all were fine. I seriously think the engine is
"off center" because the transmission shift leaver says the car is in
neutral when it's actually in drive. I'm going to have the other two
mounts replaced and have the engine re-aligned to see if that helps.

Thanks again,

D

 

[Daniel J. Stern]

Thanks a lot for your information. It was very informative. I took the
car back to the mechanic and let him check the engine mounts again. He
said they all were fine.

Then it sounds as if he does not know how to center them.

I seriously think the engine is "off center"
because the transmission shift leaver says the car is in neutral when
it's actually in drive.

That's a totally separate adjustment, not affected by the centering of the
engine mounts.

DS

 

[Guest]

My 93 acclaim makes a loud roaring noise when going around a left
curve at highway speeds. It sounds like the engine "amplified". In
other words the engine gets a lot louder when going around a left
curve. The sound changes when bumping the gas pedal. I believe it is
a motor mount, but not sure which one even if that is the problem. I
replaced the front one, it was very worn. When I'm cruising along and
take my foot off the gas I hear a high pitched buzz, whistling type of
noise. I don't know where that's coming from either. I've been to a
mechanic and he doesn't know what's wrong. I'm afraid these sounds
will lead to something serious later on. Thanks for information.

Sure sounds like one or more bad front wheel bearings to me. Likely
the left one, but that's just a SWAG.