Reducing Vibrations On A 91 Cummins

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Jul 21, 2008 | 09:55 AM

#11

bigreddog

Diesel Enthusiast

Joined: Jul 2008

Posts: 101

Likes: 18

From: lower Wash. state

How much does he want for it, and do you have pictures? I thinking there's nothing wrong with the truck. These older ladies, didn't and never will drive like a Rolls Royce, they have viberitions and rattles. It's takes a hardy sort to drive and enjoy them. Just my 2 cents.

Jan 4, 2009 | 11:38 AM

#12

Panama Jack

Newbie

Joined: Jan 2009

Posts: 1

Likes: 0

Fluid damper

Quote:

Originally Posted by hydroshok

My coworker’s 91 Cummins constantly vibrates. He is getting older and does not want to put up with it anymore. What inexpensive upgrades could he buy to reduce or eliminate the vibrations?

There have been several discussion about this subject and one of the items that is been use is a cranshaft fluiddamper pulley...Also "Second Skin" have several products and inside the cab carpet mats that reduce few dB for a smoot ride....

Also increasing Idle rpm to about 1000 is a good idea....

http://www.secondskinaudio.com/

Last edited by Panama Jack; Jan 4, 2009 at 11:45 AM.

Jan 4, 2009 | 07:16 PM

#13

RSWORDS

BOMBARDIER

Joined: Mar 2007

Posts: 11,159

Likes: 918

From: Gloucester, VA

Quote:

Originally Posted by Panama Jack

Sound Deadening Materials for Noise Reduction from Second Skin

Bumping your idle to 1000RPM could have other effects though. Aweful Hard on the auto trannys. and you truck will want to "push" through your breaks a little. Not to mention when you snap the throttle it will tend to hang at the high RPM for a little. At 750-800 RPM there is no more vibrtion then at 1000. It would be a good idea to check it as I have seen quite a few un molested 1st gens that the idle is way down, like 500-600. Dont know why but I have seen a few like this.