Harmonic balancer issues.. please help!!
Thread Starter
Heel & Toe
Joined: Sep 2012
Posts: 24
Likes: 0
Harmonic balancer issues.. please help!!
Hey guys recently noticed the notorius wobble on my 05 C6.. I have made a horrible mistake of taking everything apart while waiting on my powerbond underdrive to be delivered. In my hurry to pull this car apart I somehow forgot to mark the crank and stock balancer is there any other way I can find how to line the new balancer up on the crank so the motor will not be out of balance ... I know this was incredibly irresponsible on my part but any help would be greatly appreciated!! Thank you all in advanced
Team Owner
Joined: Mar 2008
Posts: 21,502
Likes: 461
From: Southern Utah
Someone who has more knowledge in the replacement of the HB can add to this, but the HB does not balance the engine in the way you are thinking. It is basically a rotating mass that is rubber mounted to allow it to counteract torsional vibrations in the crank assembly. In other words, The balancer is not heavier on one side to counteract the fact that the crank is heavier on the other side. That kind of balancing is done (if it is needed) by the flexplate or flywheel at the other end of the engine...depending on whether the engine is an internally or externally balanced one. I hope this makes sense...it's hard to explain...
Burning Brakes
Joined: Oct 2003
Posts: 826
Likes: 52
From: Chicopee MA
http://www.atiracing.com/products/dampers/
Purchase this and it balances out itself. The only way to go.
Purchase this and it balances out itself. The only way to go.
Melting Slicks
Joined: Jan 2013
Posts: 2,576
Likes: 237
From: Murphy NC
I did a Jegg's... There are timing marks on the new HB, but I could not find any on the car.
I just sealed the slot for the key and slid the new HB on...
10K miles and I am still riding in Harmony.
I just sealed the slot for the key and slid the new HB on...
10K miles and I am still riding in Harmony.
Safety Car
Joined: May 2011
Posts: 3,807
Likes: 508
From: Oshawa, Ontario
Hey guys recently noticed the notorius wobble on my 05 C6.. I have made a horrible mistake of taking everything apart while waiting on my powerbond underdrive to be delivered. In my hurry to pull this car apart I somehow forgot to mark the crank and stock balancer is there any other way I can find how to line the new balancer up on the crank so the motor will not be out of balance ... I know this was incredibly irresponsible on my part but any help would be greatly appreciated!! Thank you all in advanced
Melting Slicks
Joined: Oct 2010
Posts: 2,220
Likes: 16
From: Sugarhill Ga
don't panic
I does not make a difference. If you want, spin the engine to top dead center and then slide it on, but you don't have to. I would suggest pinning the crank while you have it apart.
Advanced
Joined: Jun 2011
Posts: 46
Likes: 1
Everyone says it doesn't matter.
Even the GM service manual doesn't seem to clearly call out the need to match the harmonic balancer to the engine. They talk about replacing the weights in the balancer, but it is not clear. Hey, I replaced mine with no ill effects.
However, take a look at this video.
This is a youtube video from National Geographic of GMs builds of the corvette ZR-1.
13.06...Hmm. I clearly see weights being added to the harmonic balancer while it is attached to the engine.
From the overdubbed announcer, and what the worker appears to be doing, it looks like the harmonic balancer IS balanced as part of the engine. At least on the ZR-1.
Even the GM service manual doesn't seem to clearly call out the need to match the harmonic balancer to the engine. They talk about replacing the weights in the balancer, but it is not clear. Hey, I replaced mine with no ill effects.
However, take a look at this video.
This is a youtube video from National Geographic of GMs builds of the corvette ZR-1.
13.06...Hmm. I clearly see weights being added to the harmonic balancer while it is attached to the engine.
From the overdubbed announcer, and what the worker appears to be doing, it looks like the harmonic balancer IS balanced as part of the engine. At least on the ZR-1.
Safety Car
Joined: Feb 2007
Posts: 4,684
Likes: 107
From: Opelika Alabama
if you have a 2005 and it's seial # is in the range of known problems and it has not been fixed GM WILL fix! regaurdless of warranty, it was a recall if yours is just osolating back and forth LIKE ALL STOCK HB'S THEN THERE IS NOTHING WRONG!
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Safety Car
Joined: Feb 2007
Posts: 4,684
Likes: 107
From: Opelika Alabama
Everyone says it doesn't matter.
Even the GM service manual doesn't seem to clearly call out the need to match the harmonic balancer to the engine. They talk about replacing the weights in the balancer, but it is not clear. Hey, I replaced mine with no ill effects.
However, take a look at this video.
This is a youtube video from National Geographic of GMs builds of the corvette ZR-1.
Chevrolet Corvette C6 ZR1 - Mega Factories - Super Cars - National Geographic Documentary - YouTube
13.06...Hmm. I clearly see weights being added to the harmonic balancer while it is attached to the engine.
From the overdubbed announcer, and what the worker appears to be doing, it looks like the harmonic balancer IS balanced as part of the engine. At least on the ZR-1.
Even the GM service manual doesn't seem to clearly call out the need to match the harmonic balancer to the engine. They talk about replacing the weights in the balancer, but it is not clear. Hey, I replaced mine with no ill effects.
However, take a look at this video.
This is a youtube video from National Geographic of GMs builds of the corvette ZR-1.
Chevrolet Corvette C6 ZR1 - Mega Factories - Super Cars - National Geographic Documentary - YouTube
13.06...Hmm. I clearly see weights being added to the harmonic balancer while it is attached to the engine.
From the overdubbed announcer, and what the worker appears to be doing, it looks like the harmonic balancer IS balanced as part of the engine. At least on the ZR-1.
Thread Starter
Heel & Toe
Joined: Sep 2012
Posts: 24
Likes: 0
Hey guys.. Thanks for your all of your input apparently gm had already " fixed " I was told if there was red on the back of the bolt gm had done the repair but once the balance came off the rubber seal was coming out of the HB ... Since we are already this far in the engine bay decided to go with a cam install ... Any essentials I need to consider while I'm in here besides cam spring and push rods ?? Thanks for all your advice!