Vibration / Buzz at idle - Chevelle Tech
Troubleshooting Diagnosing problems done here.

 
LinkBack Thread Tools Search this Thread Display Modes
post #1 of 7 (permalink) Old Oct 7th, 04, 2:19 PM Thread Starter
Tech Team
 
Join Date: Sep 2001
Posts: 222
Post

I have noticed letely that my car has started to vibrate more at idle. It is like a constant BUZZ that comes through the dash. It already vibrated quite a bit due to the loud mufflers but this seems like it is coming from the engine.

The most noticeable thing is when at idle in drive with foot OFF the brake it does it more. But as soon as I put my foot on the brake it quiets down quite a bit.

My first suspect is the Derale 17inch heavy duty flex fan. When I first put it on about 2-3 months ago it was alittle louder than the stock fan.

I thought maybe it was loose or had some play in it. But i checked the bolts and they are tight. If I grab the fan and try to wiggle it I get maybe 1/16 of play.

I also found a post on here that said check the balancer to make sure the outside hasnt seperated from the inside. I checked it out and it seems all in tact.

Any other suggestions. Once I give it some gas it goes away. On the Highway I dont notice anything it drives normal.
mykes68 is offline  
Sponsored Links
Advertisement
 
post #2 of 7 (permalink) Old Oct 7th, 04, 5:36 PM
Senior Tech Team
Dave
 
Join Date: Sep 1998
Location: Sapulpa, OK
Posts: 4,973
Post

I'd check for close contact on the driver's side. Header clearance, exhaust, speedo cable, etc. Anything that might be real close, the gap will change when you load the engine.
d1_bradley is offline  
post #3 of 7 (permalink) Old Oct 8th, 04, 5:51 PM Thread Starter
Tech Team
 
Join Date: Sep 2001
Posts: 222
Post

I cant see anything that is touching. The only thing I noticed is that seems like my power steering cap came loose and sprayed all over the side of the fender.

Could it be a possiblity that the belt or pulley got sprayed and now the belt is slipping causing a buzz at idle. Because sometimes it seems as if it is coming up the steering column but then again it seems to buzz the drivers side dash also.

But then again why would it quiet down when I step on the brake but when i let go it gets louder??
mykes68 is offline  
 
post #4 of 7 (permalink) Old Oct 8th, 04, 7:45 PM
Senior Tech Team
Dave
 
Join Date: Sep 1998
Location: Sapulpa, OK
Posts: 4,973
Post

Could be pump. By stepping on the brake, your body is actually attenuating the vibrations coming up the column / firewall. Might also be sure that the booster or master cylinder mounting point is good and tight.
d1_bradley is offline  
post #5 of 7 (permalink) Old Nov 6th, 04, 5:47 PM
 
Join Date: Oct 2004
Location: Lakeside, Arizona
Posts: 6
Post

I have the same problem. One of my headers touches the upper front control arm.
SSWANAB is offline  
post #6 of 7 (permalink) Old Nov 8th, 04, 4:51 AM
Tech Team
 
Join Date: Mar 2004
Location: placentia, CA
Posts: 76
Post

I had a very simmaler noise in my 69 el camino that would go away when i stepped on the brake. It turned out to be that the master cylinder was missing 1 of the 4 bolts and was vibrating on the firewall. so I tightend them up and it went away.

I love my El Camino.
caminokid is offline  
post #7 of 7 (permalink) Old Nov 8th, 04, 6:22 PM
Tech Team
 
Join Date: Nov 2001
Location: Hagerstown MD
Posts: 220
Post

If there is a frame mounted brake line distrabution block. Header could be rubbing it. Happened to me on my 69 Chevelle.

Ron<br />69 SS 454+100=505 350/Auto<br />Street/ Strip Pump gas<br />Best 1/4 time [email protected]<br />Hoosier Q/T Pros<br />Goal 2004 10.8s<br />Raced twice in 04 best [email protected]
0/6 = 60' 1.94 to 2.02
To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
Ron_Long is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Chevelle Tech forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address. Note, you will be sent a confirmation request to this address.

Email Address:
OR

Log-in









Old Thread Warning
This Thread is more than 5589 days old. It is very likely that it does not need any further discussion and thus bumping it serves no purpose.
If you still feel it is necessary to make a new reply, you can still do so though.

Thread Tools Search this Thread
Show Printable Version Show Printable Version
Email this Page Email this Page
Search this Thread:

Advanced Search
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome