vibration with a/c on

F

FL. 2001 XJ

NAXJA Forum User

Location

Florida

• Apr 19, 2008

• #1

with a/c compressor on I have vibration at idle.
This is the first jeep I have owned! Is this normal? The jeep has new enigne mounts, but they are after market mounts. Before I spend the money on oem mounts, I want to know if any one has any suggestions.

 

Saudade

NAXJA Member

NAXJA Member

Location

SoCal

• Apr 20, 2008

• #2

If your getting a lot of vibes with the AC on, I'd suspect your compressor is going out. When running, put your hand on it. Do you feel it too?

 

B

Blaine B.

NAXJA Forum User

Location

Northwest Indiana

• Apr 20, 2008

• #3

It could be the electric fan too, since it also operates with the A/C. It is possible one of the blades is chipped or what not to make it spin unevenly, creating a vibration.

 

F

FL. 2001 XJ

NAXJA Forum User

Location

Florida

• Apr 22, 2008

• #4

Thanks for the replies! The first thing I checked was the fan, I un-plugged the fan vib is still there. I can duplicate the vibration with with vehicle idleing with the throttle slighly compressed about (750-800 rpm) even with a/c off. Suspected motor mounts but, they are brand new. They are after market mounts! I looked at oem mounts and they have hollow centers. these are solid.

 

F

FoMoCo

NAXJA Forum User

Location

SoCal

• Apr 22, 2008

• #5

it could be that your aftermarket motor mounts are poly instead of rubber like the stock ones, poly is stronger and will last longer but transmits more vibes to the unibody

 

F

FL. 2001 XJ

NAXJA Forum User

Location

Florida

• Apr 22, 2008

• #6

Thats what my thought was! I am going to install new mounts in the next week or two. This is not that big of a deal, just kind of annoying.
Thanks for all replies!