3800 what is this F%#$ING rattle?????

phat_ridegt

TCG Elite Member
Sep 16, 2007
3,351
2
Ottawa
heres the scoop....

one day at the track, the car developed a rattle coming from what seemed like the belt area...

i pulled the blower belt off, and was relieved to find the noise didnt go away (meaning my new gen v wasnt the cause). so trailered the car home in the event it was a rod noise...

i work on these motors/cars every day, and i have never heard a noise like this. i was convinced it was the flexplate. so i started prepping the motor to come out, and deicded i would pull the converter to flexplate bolts and start the car...did that-noise when away. so i went ahead and yanked the motor only to find a perfectly good flexplate. what i DIDNT even think about, is that i have the alt, ps pump, and ac off the motor already, and there was no belt....in my best jeff dunham voice- *dumbass*

heres the deal, i replaced the drive belt tensioner, the noise got better, but not gone. if i pull the blower belt off now, the noise is gone. i have had 3 NEW gm tensioners on the s/c drive system. i cant see getting 3 bad ones in a row. the noise is definetly the belt tensioners, and it is mainly (98%of the noise) the s/c tensioner.

i have a newer 8rib balancer, i have not tried a stock balancer, but this all started a week after i installed the 8 rib system. i have tried a bigger pulley/belt and to no avail, the noise is there. i am running the tightest belt i can possible fit on the car now, with a 2.55" pulley.


what in the hell is making the tensioner slap causing my car to sound like junk???

fwiw it goes away at any rpm over 850ish...basically anything over idle, noise is gone. with the a/c (see last video) on, it is even worse and sounds just horrible.

videos-
http://s53.photobucket.com/albums/g56/phat...¤t=MVI_3309.flv

http://s53.photobucket.com/albums/g56/phat...¤t=102_1511.flv

http://s53.photobucket.com/albums/g56/phat...¤t=102_1512.flv
 
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