BB Vibration Dampners
#1
BB Vibration Dampners
Are there differances in dampners between the big blocks, like there is with chevy motors? I have a 455 that was put together a couple of years ago, supposidly balanced and all. I recently have been driving it (2,000 miles) and it feels like its eating itself at about 2500 to 3000 rpm. Thanks for any help in advance. Ron
#2
according to the gm parts catalog, all 455's used the same balancer. p/n 417142.
https://classicoldsmobile.com/forums...-417142-a.html
bill
https://classicoldsmobile.com/forums...-417142-a.html
bill
#3
according to the gm parts catalog, all 455's used the same balancer. p/n 417142.
https://classicoldsmobile.com/forums...-417142-a.html
bill
https://classicoldsmobile.com/forums...-417142-a.html
bill
#5
Here's the 307 hockey puck. http://www.ebay.com/itm/OLDS-OLDSMOB...47577c&vxp=mtr
Here's the 350-455 bigger balancer. http://www.ebay.com/itm/New-Harmonic...a0618d&vxp=mtr
Here's the 350-455 bigger balancer. http://www.ebay.com/itm/New-Harmonic...a0618d&vxp=mtr
#6
Thanks for the info, my engine does have the correct balancer on it then. I took her on her first big trip yesterday, and 100 miles from home, blew a header gasket, errrrrr. After pulling the header off, I did get a chance to see that I didn't make the mistake of using Polyurethane motor mounts at least, like I did on the body mounts. Well, back to the drawing board. Thanks again, especialy for the pics, that helped a lot. Ron
#8
Balance
Hopefully they did a good job with the balance. Normally you would get a balance card with components specific weights listed and also information about any mallory (heavy metal) that may have been added to the crank. Was it internally balanced or externally balanced? You may want to check your motor mounts by brake torquing your engine in gear to see if it lifts up from a broken mount. Check the fan clutch if it has one. Check the water pump bearing by rocking the fan. Check the torque converter bolts. Check the trans mount, u-joints and drive shaft balance. Check for a dead cylinder. I hope you find your problem and it doesn't involve a full tear down. Please keep us posted.
#10
except for most of the vin 9 307's, they also used 417142.
bill
Last edited by BILL DEMMER; January 10th, 2013 at 10:39 PM.
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