Bad harmonic balancer
Thread Starter
Drifting
Joined: Apr 2009
Posts: 1,307
Likes: 26
From: Miami
Bad harmonic balancer
Helllo,
After getting tired of my dealer not being able to track the cause of my spontanious Active handling messages I took my car to another mechanic.
They noticed a vibration coming from my harmonic balancer(It was). They are offering to change it for me and add an underdrive pulley at no cost for giving them the gig.
I've heard good and bad things about that mod. Being that my car has 29k miles on it and the oem has already gone bad, should I go with the OEM one??
ASP or ASW one of those brands. No cost due to warranty. if I wanted to go with say an ATI unit I would have to pay the 400+ dollars.
I kinda dont want to dish out the money for an ATI if OEM will be free.
What do you pros think. (Money is always an issue to most, of course)
I dont have heads or a cam at this time.
Any info would be greatly appreciated.
Rod
After getting tired of my dealer not being able to track the cause of my spontanious Active handling messages I took my car to another mechanic.
They noticed a vibration coming from my harmonic balancer(It was). They are offering to change it for me and add an underdrive pulley at no cost for giving them the gig.
I've heard good and bad things about that mod. Being that my car has 29k miles on it and the oem has already gone bad, should I go with the OEM one??
ASP or ASW one of those brands. No cost due to warranty. if I wanted to go with say an ATI unit I would have to pay the 400+ dollars.
I kinda dont want to dish out the money for an ATI if OEM will be free.
What do you pros think. (Money is always an issue to most, of course)
I dont have heads or a cam at this time.
Any info would be greatly appreciated.
Rod
Last edited by SgtRod; Jun 12, 2009 at 09:52 AM.
Le Mans Master
Joined: Jan 2003
Posts: 8,596
Likes: 19
From: Portland Oregon
Helllo,
After getting tired of my dealer not being able to track the cause of my spontanious Active handling messages I took my car to another mechanic.
They noticed a vibration coming from my harmonic balancer(It was). They are offering to change it for me and add an underdrive pulley at no cost for giving them the gig.
I've heard good and bad things about that mod. Being that my car has 29k miles on it and the oem has already gone bad, should I go with the OEM one??
ASP or ASW one of those brands. No cost due to warranty. if I wanted to go with say an ATI unit I would have to pay the 400+ dollars.
I kinda dont want to dish out the money for an ATI if OEM will be free.
What do you pros think. (Money is always an issue to most, of course)
I dont have heads or a cam at this time.
Any info would be greatly appreciated.
Rod
After getting tired of my dealer not being able to track the cause of my spontanious Active handling messages I took my car to another mechanic.
They noticed a vibration coming from my harmonic balancer(It was). They are offering to change it for me and add an underdrive pulley at no cost for giving them the gig.
I've heard good and bad things about that mod. Being that my car has 29k miles on it and the oem has already gone bad, should I go with the OEM one??
ASP or ASW one of those brands. No cost due to warranty. if I wanted to go with say an ATI unit I would have to pay the 400+ dollars.
I kinda dont want to dish out the money for an ATI if OEM will be free.
What do you pros think. (Money is always an issue to most, of course)
I dont have heads or a cam at this time.
Any info would be greatly appreciated.
Rod
Race Director
Joined: Jun 2005
Posts: 10,909
Likes: 2,701
From: Phila Suburbs 2023 C8 & 2013 650ix
But I am wondering how your mechanic came to the conclusion that the OE unit is bad.
Me too since there is no out of tolerance specification for pulley wobble which is what I suspect you are seeing. Only if the wobble is severe enough to make the belt start chirping at idle will GM replace it.
Me too since there is no out of tolerance specification for pulley wobble which is what I suspect you are seeing. Only if the wobble is severe enough to make the belt start chirping at idle will GM replace it.
Thread Starter
Drifting
Joined: Apr 2009
Posts: 1,307
Likes: 26
From: Miami
I can see a deffinite wobble in the pulley. Not chirping though.
I have heard of some of those brands(powerbond and swp) causing timming chain problems in some motors. Should I go with an underdrive pulley at all(for the gain since im at it) or stick to stock?
Im gonna get a second opinion from another dealer on the wobble problem.
Even though GM will wait for it to fly off befor fixing it, if the wobble is even a sign that it is about to go bad then I might as well do it before warranty goes bye bye
Is that wobble a sign of it going bad in the near future?
Stock or aftermarket brand?(ati not an option due to $)
underdrive or stock size?
Down sides?
Thanks for taking the time to reply
Rod
I have heard of some of those brands(powerbond and swp) causing timming chain problems in some motors. Should I go with an underdrive pulley at all(for the gain since im at it) or stick to stock?
Im gonna get a second opinion from another dealer on the wobble problem.
Even though GM will wait for it to fly off befor fixing it, if the wobble is even a sign that it is about to go bad then I might as well do it before warranty goes bye bye
Is that wobble a sign of it going bad in the near future?
Stock or aftermarket brand?(ati not an option due to $)
underdrive or stock size?
Down sides?
Thanks for taking the time to reply
Rod
Race Director
Joined: Jun 2005
Posts: 10,909
Likes: 2,701
From: Phila Suburbs 2023 C8 & 2013 650ix
Is that wobble a sign of it going bad in the near future?
I don't think so. Apparently a lot of people are running with pulleys that wobble to some degree. And is doesn't mean that it's going to fly off as long as you are not in the first 11039 cars in 05.
I don't think so. Apparently a lot of people are running with pulleys that wobble to some degree. And is doesn't mean that it's going to fly off as long as you are not in the first 11039 cars in 05.
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Burning Brakes
Joined: Nov 2007
Posts: 1,083
Likes: 3
From: Buena Park CA
Timing chain problems? No, that's ludicrous. All the UD pulley does is reduce the rotational velocity of a few of your accessories thereby increasing the mechanical advantage of your engine (by 10HP); the alternator is the important one where you'll have to reprogram your computer to make your engine idle a little higher (to 700RPM), that's it! I have the PowerBond by the way and I love it, no problems.
Just make sure if you decide to go with an UD pulley, also install the crankshaft pins, you'll be happy you did!
Just make sure if you decide to go with an UD pulley, also install the crankshaft pins, you'll be happy you did!
Last edited by HuskerBullet; Jun 14, 2009 at 03:12 AM.
Melting Slicks
Joined: Sep 2007
Posts: 2,045
Likes: 3
From: Indy IN
Timing chain problems? No, that's ludicrous. All the UD pulley does is reduce the rotational velocity of a few of your accessories thereby increasing the mechanical advantage of your engine (by 10HP); the alternator is the important one where you'll have to reprogram your computer to make your engine idle a little higher (to 700RPM), that's it! I have the PowerBond by the way and I love it, no problems.
Just make sure if you decide to go with an UD pulley, also install the crankshaft pins, you'll be happy you did!
Just make sure if you decide to go with an UD pulley, also install the crankshaft pins, you'll be happy you did!
Safety Car
Joined: Feb 2007
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From: Opelika Alabama
Race Director
Joined: Jun 2005
Posts: 10,909
Likes: 2,701
From: Phila Suburbs 2023 C8 & 2013 650ix
I really don't know what you are talking about because the problem was related to first 11039 cars built in 05. Not any beyond that.
And if it were a recall, you would have been notified directly by GM, not by a dealer. You would chose the dealer you want to go to for the repair. Sounds to me like the dealer was trying to drum up some service business.
And if it were a recall, you would have been notified directly by GM, not by a dealer. You would chose the dealer you want to go to for the repair. Sounds to me like the dealer was trying to drum up some service business.
Last edited by Walt White Coupe; Jun 15, 2009 at 07:05 AM.
Melting Slicks
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