Cranckshaft Damper vibration
Thread Starter
Drifting
Joined: Sep 2014
Posts: 1,579
Likes: 59
From: Trieste Italy
Cranckshaft Damper vibration
Hi there...
I've something strange about damper. When it is idling seems Is vibrate a little. I'm not be able to tell you if it's just an optical effect or it's really vibrates. anyway just throttle a little and isn't vibration anymore.
Have you ever noticed this on your cars? Mine is 1995
I've something strange about damper. When it is idling seems Is vibrate a little. I'm not be able to tell you if it's just an optical effect or it's really vibrates. anyway just throttle a little and isn't vibration anymore.
Have you ever noticed this on your cars? Mine is 1995
Last edited by Christi@n; Jun 2, 2016 at 06:03 PM.
Race Director
Joined: Oct 2008
Posts: 17,982
Likes: 1,074
From: Lansing MI
Hi there...
I've something strange about damper. When it is idling seems Is vibrate a little. I'm not be able to tell you if it's just an optical effect or it's really vibrates. anyway just throttle a little and isn't vibration anymore.
Have you ever noticed this on your cars? Mine is 1995
I've something strange about damper. When it is idling seems Is vibrate a little. I'm not be able to tell you if it's just an optical effect or it's really vibrates. anyway just throttle a little and isn't vibration anymore.
Have you ever noticed this on your cars? Mine is 1995
Its seems like none of them are perfectly straight....there is probably nothing wrong.
Thread Starter
Drifting
Joined: Sep 2014
Posts: 1,579
Likes: 59
From: Trieste Italy
Surely all block is swinging at idle, though PS or belt tensioner pulleys seem not to have this swing.
Anyway just push a little on throttle and this swing disappear
Last edited by Christi@n; Jun 3, 2016 at 05:26 AM.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Thread Starter
Drifting
Joined: Sep 2014
Posts: 1,579
Likes: 59
From: Trieste Italy
Race Director
Joined: Mar 2015
Posts: 15,926
Likes: 579
Thread Starter
Drifting
Joined: Sep 2014
Posts: 1,579
Likes: 59
From: Trieste Italy
Just to be sure, i'm speaking about harmonic balancer... Is it mades in two pieces with rubber inside??
Race Director
Joined: Mar 2015
Posts: 15,926
Likes: 579
If you need to change it. Take the three bolts off and tap and turn from the underside with a drift or one by. Keep tapping and turning till arm falls off damper will come off shortly after. Put antisieze on new one to save arm next time.
Thread Starter
Drifting
Joined: Sep 2014
Posts: 1,579
Likes: 59
From: Trieste Italy
Yes but it not really a balancer more of a damper. If you need to change it. Take the three bolts off and tap and turn from the underside with a drift or one by. Keep tapping and turning till arm falls off damper will come off shortly after. Put antisieze on new one to save arm next time.
If you need to change it. Take the three bolts off and tap and turn from the underside with a drift or one by. Keep tapping and turning till arm falls off damper will come off shortly after. Put antisieze on new one to save arm next time. Also if i will mark it with chalks should i see if two pieces are slipping? That's right?
Last edited by Christi@n; Jun 3, 2016 at 06:55 AM.
Race Director
Joined: Mar 2015
Posts: 15,926
Likes: 579
Race Director
Joined: Oct 2008
Posts: 17,982
Likes: 1,074
From: Lansing MI
If i look at the cranckshaft damper, (with engine idle speed) it seems to swings or to wobbles as you said respect its frontal plane. (Hope this explanation works better)
Surely all block is swinging at idle, though PS or belt tensioner pulleys seem not to have this swing.
Anyway just push a little on throttle and this swing disappear
Surely all block is swinging at idle, though PS or belt tensioner pulleys seem not to have this swing.
Anyway just push a little on throttle and this swing disappear
So everything Antfarmer said is true. You can use whatever you want to mark it, wax pencil, paint marker ect ... I would just add that some amount of lateral runout is normal. Even though there shouldn't be any. Pretty much all of these that have some miles on them will have some amount of runout. So if it were me, my action plan would be to mark it properly and inspect it daily until I was convinced that it was either ok or about to self destruct. I would not skip to just replacing it even though there wouldn't be anything wrong with that.
Last edited by PatternDayTrader; Jun 3, 2016 at 06:07 PM.
Supporting Vendor
Joined: Oct 2004
Posts: 761
Likes: 68
Hi There !
#1 the damper hub is pressed on with no key although the crank has a keyway.
In my opinion all dampers at 20 years need be replaced !
I sell the ATI 6+8 SuperDamper. It will replace your stock LTx balancer and has an extra 8 ribs if you ever go the blower route. It also has the keyway to match the GM.
If interested e-mail me: greg@blowerworks.net
#1 the damper hub is pressed on with no key although the crank has a keyway.
In my opinion all dampers at 20 years need be replaced !
I sell the ATI 6+8 SuperDamper. It will replace your stock LTx balancer and has an extra 8 ribs if you ever go the blower route. It also has the keyway to match the GM.
If interested e-mail me: greg@blowerworks.net
Race Director
Joined: Oct 2008
Posts: 17,982
Likes: 1,074
From: Lansing MI
Yeah that ATI unit looks like a nice piece. It probably does everything better than the gm damper.
As antfarmer eluded to. There is no way on earth I would voluntarily agree to remove and reinstall the crank hub with the engine in the car, and I have the correct tools !
As antfarmer eluded to. There is no way on earth I would voluntarily agree to remove and reinstall the crank hub with the engine in the car, and I have the correct tools !