Vibration noise thru steering column... - Team Camaro Tech
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post #1 of 11 (permalink) Old Oct 17th, 03, 10:46 AM Thread Starter
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69 Camaro, nonTilt (No tilt)

Trying to diagnose 'noises' so I am hoping someone has advise. While driving around in the city at certain rpms the car will send a vibration down the steering column causing it to make a buzzing sort of sound. When it does it if I push hard on the steering wheel I can stop the noise, obviously I would like to correct this issue rather than pushing on the steering wheel to make the noise go away. Steering wheel is an aftermarket GRANT wheel but it doesn't seem to be coming from the steering wheel itself but more likely something inside the column vibrating like the shaft or something.
Anyone know what might be causing this noise?

1969 Camaro - GM 2003 Electron Blue
Beck Racing 383 cu in 465HP Engine - Sean Murphy Inductions Stage 2 Quadrajet
TCI Streetfighter 350 - 3.73:1 Posi 10 Bolt Rear - 12.6 sec qtr mile

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post #2 of 11 (permalink) Old Oct 17th, 03, 12:07 PM
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Probably a disintegrated lower shaft bearing at the bottom of the column, or a badly deteriorated rag joint, allowing metal-to-metal contact between the upper and lower flanges. [img]graemlins/thumbsup.gif[/img]

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post #3 of 11 (permalink) Old Oct 17th, 03, 12:44 PM Thread Starter
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Hmm, the noise does seem to radiate from the upper section of the shaft, and the rag joint is in excellent condition. I hate noise issues, they are the hardest to resolve.

1969 Camaro - GM 2003 Electron Blue
Beck Racing 383 cu in 465HP Engine - Sean Murphy Inductions Stage 2 Quadrajet
TCI Streetfighter 350 - 3.73:1 Posi 10 Bolt Rear - 12.6 sec qtr mile

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post #4 of 11 (permalink) Old Oct 17th, 03, 12:57 PM
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The firewall seal for the column is a tear-drop shaped piece of rubber. It is fastened to the column with a clamp. There is a single 1/4" head screw (I think). The molded circular escucion must be pulled back and twisted to get access. Loosen the clamp and the three bolts that hold the wheel in place. Pull the wheel out or push in to relax the rag joint. Then adjust the shim on the right rear under-dash column nut. You should be able to position the wheel so it doesn't rest too heavily on the firewall seal and ragjoint as well as get the shaft properly alighed with the box. Beyond that, what do the subframe bushings look like? Are they properly installed and torqued (not over torqued etc.)?

-dnult

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68 Coupe, 350 w/ Edelbrock Performer RPM heads, cam, intake, 700R4, Dave's small body HEI
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post #5 of 11 (permalink) Old Oct 17th, 03, 02:33 PM
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dnult
what is the correct torque for the sub frame mounts?

Dave
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post #6 of 11 (permalink) Old Oct 17th, 03, 04:33 PM
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I'll check my manual tomorrow and drop you a line, or perhaps someone else knows off the top of their heads.

-dnult

Dave
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68 Coupe, 350 w/ Edelbrock Performer RPM heads, cam, intake, 700R4, Dave's small body HEI
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post #7 of 11 (permalink) Old Oct 18th, 03, 10:34 AM Thread Starter
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The body to subframe bushings bushing bolts are 85 ft.lbs.
subframe to radiator support bushing bolts are 50 ft. lbs.

All new Energy Suspension bushings, I recently rebuilt the whole front end. I'll take a look at the stuff you mentioned above, maybe the column is resting against the firewall as you say.

1969 Camaro - GM 2003 Electron Blue
Beck Racing 383 cu in 465HP Engine - Sean Murphy Inductions Stage 2 Quadrajet
TCI Streetfighter 350 - 3.73:1 Posi 10 Bolt Rear - 12.6 sec qtr mile

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post #8 of 11 (permalink) Old Oct 18th, 03, 02:07 PM
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Sorry to say I didn't look up those specs, but I'd say you're right on. That little wedge adjustment can put things in a bind as well. Being as the wheel whould want to drop down under it's own weight I'd bet this will work. Loosen all three nuts that hold the column to the dash. Insert the wedge just to the point before it sticks in the opening (Maybe a 0.025" gap). Pull out on the steering wheel or pry it with a drift about the same. Then tighten the nuts. The rag joint will be the final judge though. Probably will need to raise the front end and have someone cycle the wheel while you look at the rag joint alignment.

-dnult

Dave
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post #9 of 11 (permalink) Old Oct 19th, 03, 02:21 AM
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If you have headers, are they close to the steering gear unit ? Mine were close (especially when the engine would torque), and would cause a vibration in the steering column when they touched. I "modified" the header tube, and it went away.
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post #10 of 11 (permalink) Old Oct 19th, 03, 05:55 AM Thread Starter
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RonS, you might be onto something here!!! I don't always get the vibration, and I do have Hedmann Headers - Part Number 65003, and they do seem to come very very very darn close to that gearbox, enough that possibly at times I guess they could actually touch!! I only see at best 1/16th of an inch clearance on tube #1 driver side. Looks like I'm going to remove that header and give myself a little more clearance!

[ 10-19-2003, 09:59 AM: Message edited by: Brian Lewis ]

1969 Camaro - GM 2003 Electron Blue
Beck Racing 383 cu in 465HP Engine - Sean Murphy Inductions Stage 2 Quadrajet
TCI Streetfighter 350 - 3.73:1 Posi 10 Bolt Rear - 12.6 sec qtr mile

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post #11 of 11 (permalink) Old Oct 19th, 03, 12:02 PM Thread Starter
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Well just got done ripping the driver side header out, it was basically laying against the power steering box for Cyl #1 so I dented the header slightly to provider some breathing room. While I was at it I sanded the header down and gave it a nice coat of Duplicolor 1200 degrees Black. Also bought some new Mr Gasket 5901 gaskets. Tomorrow I'll reinstall and I am positive this will get rid of my header touching power steering issue, which should in effect remove all the vibrations I feel/hear thru the steering system at times while city driving.
Thanks a bunch guys

1969 Camaro - GM 2003 Electron Blue
Beck Racing 383 cu in 465HP Engine - Sean Murphy Inductions Stage 2 Quadrajet
TCI Streetfighter 350 - 3.73:1 Posi 10 Bolt Rear - 12.6 sec qtr mile

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