2005-2014 Mustangs Discussions on the latest S197 model Mustangs from Ford.

Belt Squeak

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Old Nov 13, 2007 | 11:29 AM
  #1  
rom8bszfh2cg5q7s4pap's Avatar
rom8bszfh2cg5q7s4pap
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Joined: Aug 2007
Posts: 123
From: MICHIGAN
Default Belt Squeak

My current issue is related to belt squeak. The belt squeak is constant, and occurs at idle or during engine load.

Please make note of description #2 below.

1. The belt squeak progressively worsens after a new belt is installed, and may reduce in severity as the engine warms up. However, the problem will worsen to the point that belt squeak is audible from engine start to engine shut off regardless of engine temperature.

2. It may be important to note the following. The vehicle suffered front end damage that caused the driver side frame rail to push against the power steering pump. There seems to be a lot of fore/aft movement in the power steering shaft. Completely removing the pulley results in the same fore/aft movement. See the video below for evidence of this movement. The video is more "audible" since you really can't see the movement.

Power Steering Pump Fore/Aft Movement

3. While the vehicle was being repaired, the engine was pulled and an 8 rib kit was installed. The belt squeak did not occur before the accident. Again, the power steering pulley was damaged during the accident, and the 8 rib kit was installed during collision repair.

4. Replacing the belt with a new belt, completely eliminates the belt squeak.

5. Completely removing the belt eliminates the noise.

6. Water sprayed on the belt eliminates the squak momentarily.

7. Belt dressing sprayed on the belt actually made the squeak worse.

8. I purchased an automotive stethoscope. However, I'm not able to really listen to the A/C, power steering, crankshaft, alternator, supercharger, and tensioner pulley because the pulley and fasteners all rotate. The remaining pulleys don't make any audible squeak noise.

9. The crankshaft is approximately 0.175 inches from the timing chain cover. The instructions that GI Joe includes with the 8 rib kit reference a need for approximately 0.200 inches.

10. I have replaced factory tensioners, and installed both Kenne Bells tensioner and currently have Thump RRRs tensioner.

11. Increasing tension on the belt does not eliminate the noise. I have adjusted Whipple's sliding idler pulley for maximum tension. I have also applied maximum tension on the tensioner pulley using a lever to increase tension while at idle.

12. Since the squeak can audibly minimize after the engine heats up, I thought I might try using a propane torch and heat the pulleys to see if I could draw any conclusion. If I heated the crankshaft pulley, it would instantly change in sound, but the squeak never went away. Heating any other pulley resulted in no audible change in the squeak.
Old Nov 13, 2007 | 11:38 AM
  #2  
owero01's Avatar
owero01
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Joined: Aug 2006
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From: MD
Default RE: Belt Squeak

Sounds like the body shop didn't do the job right and align everything right. You could use an old trick of rubbing the belt with some soap.
Old Nov 13, 2007 | 01:37 PM
  #3  
rom8bszfh2cg5q7s4pap's Avatar
rom8bszfh2cg5q7s4pap
Thread Starter
1st Gear Member
 
Joined: Aug 2007
Posts: 123
From: MICHIGAN
Default RE: Belt Squeak


ORIGINAL: owero01

Sounds like the body shop didn't do the job right and align everything right. You could use an old trick of rubbing the belt with some soap.
Actually I used some Ivory bar soap as well, to no avail.
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