2000 Chevy Blazer uneven grinding noise

Tiny
DCZL1
  • MEMBER
  • 2000 CHEVROLET BLAZER
  • 6 CYL
  • 4WD
  • AUTOMATIC
  • 9,100 MILES
When ever I am exellerating I hear a grinding noise. Its worst in hot weather. Its always starts grinding exactly when it hits 1500 rpm, and gets worse as rpms get higher. And I cant hear it below 1499 rpm. It doesnt get worse with speed, only when rpms are raised when moving. I put in in park and reved it up and didnt hear it at all. So I can be cruising at 60 and cant hear it unless the rpms are above 1500. Any ideas?
Do you
have the same problem?
Yes
No
Sunday, September 6th, 2009 AT 8:47 PM

5 Replies

Tiny
DPEPE79
  • MEMBER
What location do you think the grinding noise is coming from. Front end, rear etc?

Does the noise stop when you let your foot off the gas?

After a 20 minute drive at high speeds, CAREFULLY touch your rims on each tire, tap at first so you do not burned. Do any seem extremely hot?

Obviously do not try touching rotors or parts of the tire area, brakes etc.

Does the noise let up on one side when turning? For example. If turning to the right, does the grinding stop on the left?

Does the car stuggle to stay at a certain speed. Like you can get to 60 fine but try to hit 70 and is very difficult to do so.

Getting the general location will be helpful. I am not a mechanic but just picked up a 99 and had many steering and suspension problems. Read about and repaired enough where I think I can help.
Was this
answer
helpful?
Yes
No
-1
Tuesday, September 8th, 2009 AT 8:36 AM
Tiny
DCZL1
  • MEMBER
I have steered my car back and forth to see if it was a wheel bearing but the noise stayed no matter what way. My wheels are always hot when I get done driving. But not hot enough to burn me. It sounds like its coming from underneath somewhere on the front. Andthe noise stops when I let off the gas and the rpms are below 1500.
Was this
answer
helpful?
Yes
No
Thursday, September 10th, 2009 AT 8:16 PM
Tiny
DPEPE79
  • MEMBER
It could be your splash shields. The part that covers the rotors. I had a similar problem where they were so rusted in the back it started to twist into the rotor. Mine were so bad it causes the rotor to over heat and warp. Plus I could only hear it at low speeds. It was more of a scraping sound though.

If that is not it or sounds totally off base let me know.
Was this
answer
helpful?
Yes
No
-1
Saturday, September 12th, 2009 AT 10:59 AM
Tiny
DCZL1
  • MEMBER
As long as my rpms are below 1500 I cant hear it. No matter how fast im going. And when the transmission is in park and I rev it up past 1500 rpm I cant hear it.
Was this
answer
helpful?
Yes
No
-1
Saturday, September 12th, 2009 AT 9:56 PM
Tiny
DPEPE79
  • MEMBER
Check your fan blade to be sure it is not hitting the radiator. Also your belts. Starting to think it may be something related to the belts or a wheel the belts go around. Maybe being able to pop the hood while hitting the gas may be helpful.

Did you try joining a blazer forum. There are two good ones. I have the address bookmarked at work but am off for two weeks. I found some good help there. People are really nice and there is a whole section for sounds.

Here's what we think may be wrong with your car and what may be causing it. The list goes from the most likely problem to the least likely. Check out our Product and How To pages or the Vehicle Repair Guide for your vehicle (if available) for more information about particular parts.

Keep in mind, this is a general diagnosis. Your car may not have the parts we list as potential problems. If you're not sure if your car has a particular part, check your owner's manual.

Also on autozone. Com there is free repair info. You have to register a screen name and at the bottom of the screen you will see a repair info link. Then there is a problem solving section where a selection is sounds like. Check a bunch. Howling to one person may be screeching to another.

I will keep brainstorming but may be something I have not

Sounds Like Change
Symptom: Grinding Change
When: Starting Engine Change
Where: Engine Compartment Change

Priority Action Part Type Cause
1 Inspect Starter Drive Faulty Starter Drive.
2 Inspect Starter Starter Motor Faulty.
3 Inspect Starter Shim Improper Flywheel/ Ring Gear Clearance.
4 Inspect Ring Gear (Manual Transmission) Worn, Damaged, or Faulty Ring Gear.
5 Inspect Flywheel (Automatic Transmission) Loose or Improperly TORQUED Flywheel.
6 Inspect Starter Broken or Faulty Wire Connection.
Was this
answer
helpful?
Yes
No
+1
Sunday, September 13th, 2009 AT 8:32 PM

Please login or register to post a reply.

Recommended Guides