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05-12-2008, 06:51 AM
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CC Member
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Join Date: Jan 2008
Location: N. Las Vegas,
NV
Cobra Make, Engine: BDR # 126/ K. Craft 306 CID/375 HP- 306 RWHP
Posts: 146
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Not Ranked
Bad balancer?
Hi guys, I believe I may have a bad harmonic balancer & was wondering about a good shop to bring her to. I did a search and saw Tom's Motorsports mentioned. Wanted to get some input.
Thanks!!
__________________
Rob
" Listen to that music! "
'65 BDR #126
'84 Porsche 928S
'01 Corvette C5 coupe
'99 Ford Explorer Limited
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05-12-2008, 07:31 AM
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Member of the north
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Join Date: May 2003
Cobra Make, Engine: A Cobra
Posts: 11,207
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Not Ranked
Why do you think the balancer is bad?
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05-12-2008, 08:31 AM
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Senior Club Cobra Member
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Join Date: Jul 2000
Location: Las Vegas,
NV
Cobra Make, Engine: ERA 427 SO
Posts: 1,126
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Not Ranked
Tom comes highly recommended in the Vegas area, good guy and really knows his
Cobras.
__________________
Ken
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05-12-2008, 08:35 AM
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CC Member
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Join Date: Jan 2008
Location: N. Las Vegas,
NV
Cobra Make, Engine: BDR # 126/ K. Craft 306 CID/375 HP- 306 RWHP
Posts: 146
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Not Ranked
Quote:
Originally Posted by trularin
Why do you think the balancer is bad?
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I was under the hood watching the pulleys turn & my crank pully and balancer have a wobble, but not sideways, but an up an down motion...vertically. I do get some excess vibration at diffrent RPM's. I talked with another friend about it, & he agrees it MAY be the balancer. I know all the pulleys should be absolutely still while spinning. I have only 3 pulleys W/ a serpentine belt. The WP & alt look fine. The only other thing I could think of would be a problem with a crank bearing, but with as much movement as I am seeing, there would probably be more severe symtoms & oil leaking.
__________________
Rob
" Listen to that music! "
'65 BDR #126
'84 Porsche 928S
'01 Corvette C5 coupe
'99 Ford Explorer Limited
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05-12-2008, 09:21 AM
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CC Member
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Join Date: Jan 2008
Location: N. Las Vegas,
NV
Cobra Make, Engine: BDR # 126/ K. Craft 306 CID/375 HP- 306 RWHP
Posts: 146
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Not Ranked
Quote:
Originally Posted by mr0077
Tom comes highly recommended in the Vegas area, good guy and really knows his
Cobras.
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I appreciate that Ken, Thanks!!
__________________
Rob
" Listen to that music! "
'65 BDR #126
'84 Porsche 928S
'01 Corvette C5 coupe
'99 Ford Explorer Limited
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05-12-2008, 01:03 PM
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CC Member
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Join Date: Feb 2006
Location: Henderson,
NV
Cobra Make, Engine: FFR - 427w
Posts: 178
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Not Ranked
It could be that the pulley is drilled off-center. That happened to me with a brand new set of March pulleys and I had to send them back for replacements.
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05-12-2008, 02:12 PM
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CC Member
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Join Date: Jan 2008
Location: N. Las Vegas,
NV
Cobra Make, Engine: BDR # 126/ K. Craft 306 CID/375 HP- 306 RWHP
Posts: 146
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Not Ranked
Quote:
Originally Posted by DougR
It could be that the pulley is drilled off-center. That happened to me with a brand new set of March pulleys and I had to send them back for replacements.
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I just put that same possibility in a post on the BDR forum. It is very possible I suppose, and I have never really looked at the pulley since I have purchased the car. It could be this way since I got her!! I was under her a little while ago and took the belt off, checked the balancer and pulley by hand, & all seems tight. I will probably get her in to Tom's to make sure!
Thanks Doug!
__________________
Rob
" Listen to that music! "
'65 BDR #126
'84 Porsche 928S
'01 Corvette C5 coupe
'99 Ford Explorer Limited
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05-12-2008, 02:43 PM
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CC Member
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Join Date: Jul 2007
Location: Waterford,
PA
Cobra Make, Engine:
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If your balancer was bad... you'd know it! the car would wobble like crazy... AT idle! At anything higher than idle, it would feel like it was going to shake your car to pieces.
I've had a balancer go bad.. trust me, you know when it happens!
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Bagram AF Afghanistan
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05-19-2008, 02:20 PM
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CC Member
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Join Date: Jan 2008
Location: N. Las Vegas,
NV
Cobra Make, Engine: BDR # 126/ K. Craft 306 CID/375 HP- 306 RWHP
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Got a 12 noon appointment at Tom's this Friday. Gonna have them address my pulley/balancer issue as well as some other suff. Might as well, she will be in good hands!!
Thanks for all the input!!
__________________
Rob
" Listen to that music! "
'65 BDR #126
'84 Porsche 928S
'01 Corvette C5 coupe
'99 Ford Explorer Limited
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05-19-2008, 06:28 PM
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CC Member
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Join Date: Jul 2002
Location: Greenville,sc,
SC
Cobra Make, Engine: Kirkham 427 (KMP 266); CAV GT40
Posts: 1,464
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that may be an optical illusion created by the asymetric nature of the balancer. I think if you could actually see wobble you would feel a hell of a vibration and there would be no doubt about the cause.
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SPF Daytona coupe 055, Roush 427R
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05-19-2008, 10:47 PM
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CC Member
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Join Date: Jan 2008
Location: N. Las Vegas,
NV
Cobra Make, Engine: BDR # 126/ K. Craft 306 CID/375 HP- 306 RWHP
Posts: 146
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Not Ranked
Quote:
Originally Posted by ENTDOC
that may be an optical illusion created by the asymetric nature of the balancer. I think if you could actually see wobble you would feel a hell of a vibration and there would be no doubt about the cause.
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What about the pulley moving in sync as well?
__________________
Rob
" Listen to that music! "
'65 BDR #126
'84 Porsche 928S
'01 Corvette C5 coupe
'99 Ford Explorer Limited
Last edited by bigrob; 05-19-2008 at 11:20 PM..
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06-08-2008, 08:40 AM
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CC Member
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Join Date: Jan 2008
Location: N. Las Vegas,
NV
Cobra Make, Engine: BDR # 126/ K. Craft 306 CID/375 HP- 306 RWHP
Posts: 146
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Not Ranked
Well I did have a bad balancer! Had some minor leaks fixed as well & will have my baby back tomorrow!!
Thanks for all the help!!
__________________
Rob
" Listen to that music! "
'65 BDR #126
'84 Porsche 928S
'01 Corvette C5 coupe
'99 Ford Explorer Limited
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