GenVibe - Community for Pontiac Vibe Enthusiasts

And I Have searched!! Vibration in "D" and "R" only at around 1100rpms. Replaced the belt tensioner twice with ebay ones.. Then thought it was alternator, but after replacing with a new one no change!!
Does not vibrate with belt off!!

Should I buy an OE replacement tensioner and try that again, all other pulleys seem okay!!

Also replaced rear motor mount!!

Thanks a ton for any help!!

2007 vibe

How long have you owned the car? Did the vibration start after the motor mount replacement? What is the frequency of the vibration, is it a buzz or is it a wobble or shake in the steering wheel? Doesn't sound like a tensioner to me.

I owned car for 6 months.. Vibration was there before motor mount was replaced.. the noise is definately a vibration that only happens at 1100 rpms any higher or lower and its not present.. I took it to a shop at they checked all pulleys. Today when i took belt off it did not do it when I started car and put it in gear!!

Was the motor mount replaced with a oem or aftermarket? Some aftermarket motor mounts don't respond well below a certain rpm. My Trailblazer needs OEM mounts.

Yeah, sounds like it could be a motor mount/misalignment problem Possible accident damage, if it was doing it when you bought it. still I'd closely recheck all pulleys and put on a new serpentine belt. Also recheck all motor mounts for frame-on- engine contact. look at the exhaust system also.
Are you brake-torquing the car to get 1100rpm's or is the car in motion without brakes when this happens?

It was not doing it when I purchased. Yes I am brake torqueing vehicle to hear this at 1100rpms. Serpentine belt is new!! Is their a difference in belt tensioners off of ebay compared to an OE tensioner?? I will check mounts and pulleys again. Thanks for everyones time!!

I'm sticking with motor mounts and/or exhaust system. For me, it's not a problem until it does it without brake-torquing it. I'd still look closely at the pulleys.

I'm assuming it happens whether the car is moving or not.
Leaning towards motor mount, there are 4; Front, Rear, Top Passenger Side and Transmission.
I've heard of failing top passenger mounts before, try and wedge a screwdriver between the mount and body of the car and see if there is any twisting/movement.

Well its fixed.. Put my third belt tensioner on but this time an original equipment one. Vibration is now gone. I guess I would have never thought that the ebay ones I bought wouldn't work. Live and learn.

Thanks for all the help!!!

gilly44 wrote:Well its fixed.. Put my third belt tensioner on but this time an original equipment one. Vibration is now gone. I guess I would have never thought that the ebay ones I bought wouldn't work. Live and learn.
Thanks for all the help!!!

That makes two of us! Can you see any difference between the two tensioners? Thanks for the follow-up.