1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

Who else has RB header that vibrates against the chassis?

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Old Jul 18, 2002 | 04:44 PM
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From: Trying to convince some clown not to put a Holley 600 on his 12a.
Who else has RB header that vibrates against the chassis?

I have a serious vibration problem at certain RPMs (low) where my exhaust apparently is vibrating against my floor pan. Is this usual? Is there something I can do to correct this? I thought about shaving the engine mounts, but this seems extreme.
Must be someone else that has had this problem, right?
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Old Jul 18, 2002 | 04:59 PM
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C'mon, sterling!! Everybody else has already pulled out the Godzilla screwdriver and bent the exhaust away from the chassis!! Maybe you're getting the heat shields resonating that's creating the ruckus...
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Old Jul 18, 2002 | 05:21 PM
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From: Trying to convince some clown not to put a Holley 600 on his 12a.
Is that really what they do?- Just bend the crap outta it?
I asked this question on Mazspeed, and someone said they got instructions with their RB set that said that they might have to rotate the engine. They were suggesting that there is lea-way to shift the engine. Is this true?

I know I] did'nt get no freakin instructions like that!
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Old Jul 18, 2002 | 11:07 PM
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From: So. Arlington, TX!!!
There are mini slots in the brackets where the rubber donuts sit on the engine plate. Loosen both sides of the engine mount and then put a wood block on the side of the oil pan rail that you want to apply pressure to with a jack stand to create the necessary clearance...or pull out the giant crow bar and have at it!!
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Old Jul 19, 2002 | 06:06 AM
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Mine doesnt rattle, but then again, I have litterly NO heat shields left on my car so that may have something to do with it ...

~T.J.
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Old Sep 7, 2003 | 08:35 AM
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Sorry to pull back such an old dead thread, but I've recently developed this intense vibration at low (2k) rpms. Before I get under the sucker, just WHERE is it specifically I'm looking at the RB header banging on my car?

Thanks

jerij
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Old Feb 22, 2005 | 06:07 AM
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i'm holding the second seance for this thread ...

can the vibration be caused by not having the exhaust hung in the middle? actually i'm fairly sure that my header doesn't touch, but i think the center section may be touching. i'm not sure.

i installed my streetport exhaust a few months ago, and i've been putting up with the harsh vibrations since day one because i simply did not have the time to tend to it. i'm going to have some time in about a week. i'm thinking of just taking it to an exhaust shop and having them attach some mounting point to the middle section. might this stop the vibrations, too?

Last edited by diabolical1; Feb 22, 2005 at 06:12 AM.
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Old Feb 22, 2005 | 06:09 AM
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i was reading through THIS THREAD when i thought of it.
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Old Feb 22, 2005 | 07:03 AM
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From: Socal
Originally Posted by Sterling
I have a serious vibration problem at certain RPMs (low) where my exhaust apparently is vibrating against my floor pan. Is this usual? Is there something I can do to correct this? I thought about shaving the engine mounts, but this seems extreme.
Must be someone else that has had this problem, right?

I say, DO A SEARCH j/k. Are you sure its the header? vibration is usually cause by the heat shields either on the firewall where it slopes down to the header flange or in the driveshaft. problems are usually caused by aging engine/tranny mounts.
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Old Feb 22, 2005 | 10:01 AM
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My RB header fit fine - is it possible something is misaligned in your car?
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Old Feb 22, 2005 | 10:04 AM
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is it just me or is anyone noticing that this thread is ******* old!!!!
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Old Feb 22, 2005 | 10:06 AM
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since they mentioned "Sorry to pull back such an old dead thread" and "i'm holding the second seance for this thread", then yeah but other people might find informative discussions about the problem helpful, even if Sterling has long since corrected the problem on his own
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Old Feb 22, 2005 | 11:34 AM
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From: FL
yes ... the thread is very old ... almost 3 years, to be exact. however, i'm doing what i tell so many other people that post the-"Will a 13B Turbo fit in my SA/FB"-question. i searched!

and as Manntis correctly pointed out, it may help someone even though Sterling no longer has the issue. for example, 2000+ posts and i still have a very basic question ... is my vibration likely to be coming from the center section not having hangers and mounts attached? see? and i'm not afraid to admit that i have a basic question, either, but rather than post a new thread, i opted to search for an existing one. is that okay?
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Old Feb 22, 2005 | 11:37 AM
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From: Socal
dang, I think I should drink more coffee before posting. it is an old thread.
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