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Race car harmonic balancer question #1403557 03/17/13 05:25 AM 03/17/13 05:25 AM
Joined: Feb 2004 Posts: 135 NC B BillNC OP member
BillNC OP member B Joined: Feb 2004 Posts: 135 NC	Threw fan belt on circle track car (340) at practice, when replacing it found that harmonic balancer would rock back and forth (wobble) around 1/8 inch with engine not running. What causes this, a worn out balancer or something more serious? Thanks, my engine guy is not around.

Re: Race car harmonic balancer question [Re: BillNC] #1403558 03/17/13 07:52 AM 03/17/13 07:52 AM
Joined: Feb 2005 Posts: 28,312 Cincinnati, Ohio Challenger 1 Too Many Posts
Challenger 1 Too Many Posts Joined: Feb 2005 Posts: 28,312 Cincinnati, Ohio	More than likely it's a worn out balance r, especially if it was a stock balance r. If the motor is not leaking oil in front, then you can be sure it's just the balance r.

Re: Race car harmonic balancer question [Re: Challenger 1] #1403559 03/17/13 09:28 AM 03/17/13 09:28 AM
Joined: Jan 2003 Posts: 21,072 Niles , Ohio T therocks oh wait.but hey.lets see.oh yeah.
therocks oh wait.but hey.lets see.oh yeah. T Joined: Jan 2003 Posts: 21,072 Niles , Ohio	My kids 62 300 the balancer actually spun and made a racket.It pretty much fell off.Replaced it with Sumits SFI balancer and all is good.We have run them since the late 90s on BBs and SBs.Great piece for the price.rocky Chrysler Firepower

Re: Race car harmonic balancer question [Re: therocks] #1403560 03/17/13 02:04 PM 03/17/13 02:04 PM
Joined: Feb 2004 Posts: 135 NC B BillNC OP member
BillNC OP member B Joined: Feb 2004 Posts: 135 NC	No oil, engine still runs, never had one fail so did not know what to expect.

Re: Race car harmonic balancer question [Re: Challenger 1] #1403561 03/17/13 02:24 PM 03/17/13 02:24 PM
Joined: Jan 2003 Posts: 21,072 Niles , Ohio T therocks oh wait.but hey.lets see.oh yeah.
therocks oh wait.but hey.lets see.oh yeah. T Joined: Jan 2003 Posts: 21,072 Niles , Ohio	Factory they are just pressed together.Rubber goes bad.Just get a new balancer.Racing I wouldnt use anything but SFI.Rocky Chrysler Firepower

Re: Race car harmonic balancer question [Re: therocks] #1403562 03/17/13 05:14 PM 03/17/13 05:14 PM
Joined: Jan 2003 Posts: 27,421 Balt. Md 3 383man Too Many Posts
383man Too Many Posts 3 Joined: Jan 2003 Posts: 27,421 Balt. Md	I had a Van do that years ago. The crank bolt was not tight enough and it wore the keyway slot to about a 1/4 wide and the balancer would rock back & forth as the keyway hit the side of the worn slot. Ron

Re: Race car harmonic balancer question [Re: 383man] #1403563 03/17/13 08:10 PM 03/17/13 08:10 PM
Joined: Feb 2004 Posts: 135 NC B BillNC OP member
BillNC OP member B Joined: Feb 2004 Posts: 135 NC	Bad news, pulled the balancer, crank must have broke. $$$$$$$

Re: Race car harmonic balancer question [Re: BillNC] #1403564 03/18/13 11:17 AM 03/18/13 11:17 AM
Joined: Jan 2003 Posts: 21,072 Niles , Ohio T therocks oh wait.but hey.lets see.oh yeah.
therocks oh wait.but hey.lets see.oh yeah. T Joined: Jan 2003 Posts: 21,072 Niles , Ohio	Bill I had an old Pontiac come in like that.Had a terrible sound.Put it on the rack as I could see the pulleys wobble.Figured it was the balancer.to my suprise the snout of the crank had broke.Told the customer and he wouldnt believe it.He just drove the car away clanging like mad.Dont know how far he made it.Rocky Chrysler Firepower

Re: Race car harmonic balancer question [Re: Challenger 1] #1403565 03/18/13 01:52 PM 03/18/13 01:52 PM
Joined: Jan 2003 Posts: 75,008 U.S.S.A. JohnRR I Win
JohnRR I Win Joined: Jan 2003 Posts: 75,008 U.S.S.A.	Quote: More than likely it's a worn out balance r, especially if it was a stock balance r. If the motor is not leaking oil in front, then you can be sure it's just the balance r. I think your spell checker is not working properly ???

Re: Race car harmonic balancer question [Re: JohnRR] #1403566 03/18/13 02:13 PM 03/18/13 02:13 PM
Joined: Feb 2005 Posts: 28,312 Cincinnati, Ohio Challenger 1 Too Many Posts
Challenger 1 Too Many Posts Joined: Feb 2005 Posts: 28,312 Cincinnati, Ohio	Quote: Quote: More than likely it's a worn out balance r, especially if it was a stock balance r. If the motor is not leaking oil in front, then you can be sure it's just the balance r. I think your spell checker is not working properly ??? I know...I don't think it's made for cars because that's the way it spelled it. lol

Re: Race car harmonic balancer question [Re: BillNC] #1403567 03/18/13 02:19 PM 03/18/13 02:19 PM
Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska	Quote: Bad news, pulled the balancer, crank must have broke. $$$$$$$ did you lose the flanges on the #3 main bearing? live every 24 hour block of time like it's your last day on earth

Re: Race car harmonic balancer question [Re: RapidRobert] #1403568 03/18/13 10:19 PM 03/18/13 10:19 PM
Joined: Feb 2004 Posts: 135 NC B BillNC OP member
BillNC OP member B Joined: Feb 2004 Posts: 135 NC	We pulled the engine this afternoon (I'm sure my clients were thrilled with my absence from the office) and will take a look at the bottom end tomorrow if all goes according to plan. I love the previous post about the Pontiac and its owner in a state of disbelief. I must admit to not being much of a "real" mechanic (hopefully I'm better at being a lawyer)but I am truly amazed that this thing still ran. BP

Re: Race car harmonic balancer question [Re: RapidRobert] #1403569 03/18/13 11:10 PM 03/18/13 11:10 PM
Joined: Jul 2012 Posts: 298 mt. pleasant, PA D Diplomat440 enthusiast
Diplomat440 enthusiast D Joined: Jul 2012 Posts: 298 mt. pleasant, PA	i had the balancers outer ring slide back against the timing cover on a 413 and it killed the #3 main and in turn wiped out the 5-6 rods.

Re: Race car harmonic balancer question [Re: Diplomat440] #1403570 03/23/13 06:09 PM 03/23/13 06:09 PM
Joined: Feb 2004 Posts: 135 NC B BillNC OP member
BillNC OP member B Joined: Feb 2004 Posts: 135 NC	The builder has the engine. Will know what was hurt in a couple of weeks.

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