Re: IML: Rumbling driveline vibration

[PAUL WENTINK <randalpark@xxxxxxx>]

I don't own a '93, but engine mounts are suppose to isolate the engine, 
transmission, and drive line from the rest of the car. If the wrong 
mounts are used, there can be a direct connection, or "grounding" of 
the engine to the frame or sub-frame. If this should occur, the car 
becomes like the inside of a drum, and any sound or vibration is 
magnified.

Broken mounts typically disconnect the engine completely from the car, 
so it is possible for a noticeable increase in noise or vibration to 
occur once replaced, but the correct mounts should not do this to the 
extent you describe, especially in automobiles that are noted for 
silence and smoothness of operation. If this continues after the next 
set of mounts are installed, there may be other problems with the car, 
such as rough engine, bad c.v. joints, or u-joints which may have been 
masked by the broken mounts. It may be possible that the position of 
the exhaust system will change with the new mounts, causing it to 
"ground" against a portion of the car which should be isolated from it. 
This would also result in a noise and vibration condition.

Noises and vibration can have many different causes, so you may want to 
refer to the FSM for your car to see if there is a specific 
troubleshooting section or service diagnosis for this problem.

Paul W.


-----Original Message-----
From: NY3UVL714@xxxxxxx
To: mailing-list@xxxxxxxxxxxxxxxx
Sent: Mon, 28 Jan 2008 9:59 am
Subject: IML: Rumbling driveline vibration



Hello Imperialists,

 

I've got three questions for the group.

 

1.

my mechanic recently replaced 3 motor mounts to correct some on 
throttle/off throttle driveline lash in my midnight blue - 1993 sedan. 
After the new mounts were installed there was a noticeable  increase in 
engine

noise, vibration and harshness. Through the steering wheel I felt 
strong buzzing vibrations and could hear the engine working under 
throttle with a deep resonant sound.   My Imperial sounded and felt 
like an older panel/pickup truck.  My mechanic reinstalled the old 
mounts and has ordered a different type.  

What went wrong?

 

2.

My car is a 1993 Imperial that came from the factory with a plain metal 
chrome pentastar hood ornament without the crystalline eagle insert, no 
anti-lock brakes and a 3.3 V-6  instead of the 3.8 

I wasn't aware of Imperials equipped this way, none of my literature 
mentions this equipment level.

Please tell me more about my car.

 

3. How do I change my email address on the mailing list?

 

Big thanks,

 

Lawrence from San Francisco

 




------------------------------------------------------------
Start the year off right. Easy ways to stay in shape in the new year.


________________________________________________________________________
More new features than ever.  Check out the new AOL Mail ! - 
http://webmail.aol.com

-----------------  http://www.imperialclub.com  -----------------
This message was sent to you by the Imperial Mailing List. Please
reply to mailing-list@xxxxxxxxxxxxxxxx and your response will be
shared with everyone. Private messages (and attachments) for the
Administrators should be sent to iml.webmonster@xxxxxxxxx
To UN-SUBSCRIBE, go to http://imperialclub.com/unsubscribe.htm