Question about 1998 Ford F150 Regular Cab

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1998 Ford F150 5.4 liter V8 squealing problem. Ok, I have this loud squeal that sounds like a pulley or belt. It is getting worse by the week. At first, I would spray some WD40 on the pulleys and it would stop for a day or so, But now, Nothing works. I put a stethoscope up to my driver side valve cover and the squeal is extremely loud. Can the camshaft position sensor cause this? If not, What else could it be? 216k miles.

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  • Jeff Jan 22, 2013

    I will add that I have listened to the pulleys with the stethoscope as well and none of them sounds like the LOUD squeal that I hear when I listen to the drivers side valve cover.

  • Mike Ebz Jan 22, 2013

    Ok, Sorry I didnt know that you had already tried a new belt. Next thing I would try is to pull the belt, then spin all the pulleys you can to see if there are any that have an unusual amount of resistance. Next start the engine for a few seconds with the belt off. If the noise is gone then you know for sure that it is pulley related. It is also possible that the tensioner is bad, and it isnt pressing hard enough on the belt.

  • Mike Ebz Jan 22, 2013

    Just a few days ago I had to replace an alternator pulley that had warn to the point where all the grooves on the pulley were sharpened so wheres the belt wouldn't ride correctly on it.

  • Jeff Jan 22, 2013

    Ok, I just removed the belt and started the engine, The squeal is still there. This is baffling to me. I used a stethoscope again on the passenger and driver side of the valve cover area. The squeal is the loudest directly on the CamShaft Sensor. I haven't bought a new one yet.

  • Jeff Jan 22, 2013

    To replace the CPS, It appears to be very simple. Remove the electrical connector and the 1 bolt, Remove the sensor and install a new one. I don't think I have to go thru the trouble that the V6 engines have as in messing with the timing since the CPS only installs 1 way. Does this sound right?

  • Jeff Jan 22, 2013

    Not tensioner pulley, But the idler pulley on the driver side has burnt rubber on it

  • Jeff Jan 22, 2013

    I can't type lol- Not tensioner pulley, But the idler pulley on the driver side HAD burnt rubber on it

  • Mike Ebz Jan 23, 2013

    Did you get a chance to run it without the belt?

  • Jeff Jan 23, 2013

    I found the problem. When you hit on "rubber being on a pulley", I thought about the rubber on the idler pulley just under the CamShaft Sensor since that was where the loudest squeal was at. I removed that pulley and it was as if either no grease was in the bearing or it was seizing up. I replaced the idler pulley and the squeal is gone:) Thanks for the help. You guys do a wonderful job at helping people and saving us tons of money.

  • Mike Ebz Jan 24, 2013

    I glad I could help you! Take it ez - Mike

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I don't think its the CPS, but I do know that WD40 will make a squealing belt even worse. If you havnt replaced the belt yet, I would do that.

Let us know if that helps.

Posted on Jan 22, 2013

Testimonial: "Thanks for all of the wonderful help. When you hit on the burnt rubber on a pulley, You nailed it. Once I replaced that pulley, My squeal had stopped."

  • 6 more comments 
  • Jeff Jan 22, 2013

    I had just put a Gatorback belt on yesterday. The squeal is still there. I'm curious as to why the squeal is inside of the valve cover and not on any of the pulleys. I was asking about the CPS because I had seen a youtube video on the very same thing. The CPS that had went out on this guys truck made the same sound that my truck is making. I know autozone sells the CPS for $17.99 and it's very simple to change, But then again, I don't want to start throwing wasteful money into it. No codes are coming up yet. The belt that was on it before the Gaterback was a Napa brand belt that I had for a year. When I replaced the belt, I used soap and water to clean the pulleys.

  • Jeff Jan 22, 2013

    I will replace the CPS to see what happens. If it doesn't work, I will take it back and get a refund. I will post my results.

  • Jeff Jan 22, 2013

    Just for kicks and giggles, I put another brand new belt on it a few minutes ago and the squeal is still there.

  • Jeff Jan 22, 2013

    All of the pulleys spin without any noise without the belt on it.

  • Mike Ebz Jan 22, 2013

    Ok, then I wouldt start it up without the belt. That will definitely narrow it down.

  • Mike Ebz Jan 22, 2013

    If it doesn't make the sound with the belt off, then I would look at the pulleys again. They may feel free when there is no belt tension on them, however, check to see if they 'rock' on the center stud of the idler, and tensioner. Also, check for any burned rubber on them.

  • Jeff Jan 22, 2013

    There was burnt rubber on the (freewheeling) tensioner pulley on the drivers side about a month ago. This is what made me change belts.

  • Mike Ebz Jan 23, 2013

    Did you get a chance to run it without the belt?

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Posted on Jan 02, 2017

01fordeb
  • 1033 Answers

SOURCE: I have a 97 ford

Sounds like you have a pulley locked up. Did the belt break? If not, it could have just flowed over the locked pulley without breaking. Take the belt off and spin check all the pulley's. You will find it. Was you running the air compressor?

Posted on Dec 27, 2010

  • 248 Answers

SOURCE: 98 ford explorer makes loud squealing noise when i

usually the squeal because the belt is'nt tight enough push on it , check the deflection---no more than 1/2 inch, i like 1/4 in.....hope this helps

Posted on Feb 27, 2010

emissionwiz
  • 75814 Answers

SOURCE: squeal noise,sprayed wd40 onte idler,and tensioner

glad you got it fixed without much expense, all's well that ends well.

Posted on Apr 07, 2009

  • 3911 Answers

SOURCE: My belt is squealing really bad on my 96 Ford

Often these vehicles have a spring loaded tensioner, which you would have released to replace the belt. When the spring in the tensioner gets weak, causes a squeak.

Posted on Oct 27, 2010

SOURCE: I have a bad squeal

Unbolt it !!

Posted on Apr 03, 2011

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