Engine squeaking
Senior Member
Joined: Jul 2006
Posts: 1,593
Likes: 0
This TSB sounds like what your asking about
FORD: 2004 Expedition, F-150
LINCOLN: 2004 Navigator
ISSUE:
Some 2004 F-150, Expedition and Navigator vehicles built before 7/19/2004 may exhibit excessive front end accessory drive (FEAD) belt noise when starting the engine cold. The noise is typically described as a squeal or chirp.
ACTION:
Replace the FEAD belt. Refer to Workshop Manual Section 303-00.
PART INFORMATION
Vehicle Line Engine Part
2004 F-150 4.6L 2V 4L3Z-8620-FA
2004 F-150 5.4L 3V 4L3Z-8620-FA
2004 Expedition 5.4L SOHC 3L1Z-8620-AB
2004 Navigator 5.4L DOHC 3L1Z-8620-AB
LABOR OPERATION CLAIMING CHART
Operation Labor Operation Application Time
041807A Replace The Front End Accessory Drive (FEAD) Belt 2004 F-150
2004 Expedition
2004 Navigator 0.3 Hr.
0.4 Hr.
0.4 Hr.
WARRANTY STATUS:
Eligible Under Provisions Of New Vehicle Limited Warranty Coverage
DEALER CODING
BASIC PART NO. CONDITION CODE
8620 42
--------------------------------------------------------------------------------
NOTE: The information in Technical Service Bulletins is intended for use by trained, professional technicians with the knowledge, tools, and equipment to do the job properly and safely. It informs these technicians of conditions that may occur on some vehicles, or provides information that could assist in proper vehicle service. The procedures should not be performed by "do-it-yourselfers". Do not assume that a condition described affects your car or truck. Contact a Ford, Lincoln, or Mercury dealership to determine whether the Bulletin applies to your vehicle. Warranty Policy and Extended Service Plan documentation determine Warranty and/or Extended Service Plan coverage unless stated otherwise in the TSB article. The information in this Technical Service Bulletin (TSB) was current at the time of printing. Ford Motor Company reserves the right to supercede this information with updates. The most recent information is available through Ford Motor Company's on-line technical resources.
Copyright © 2004 Ford Motor Company
FORD: 2004 Expedition, F-150
LINCOLN: 2004 Navigator
ISSUE:
Some 2004 F-150, Expedition and Navigator vehicles built before 7/19/2004 may exhibit excessive front end accessory drive (FEAD) belt noise when starting the engine cold. The noise is typically described as a squeal or chirp.
ACTION:
Replace the FEAD belt. Refer to Workshop Manual Section 303-00.
PART INFORMATION
Vehicle Line Engine Part
2004 F-150 4.6L 2V 4L3Z-8620-FA
2004 F-150 5.4L 3V 4L3Z-8620-FA
2004 Expedition 5.4L SOHC 3L1Z-8620-AB
2004 Navigator 5.4L DOHC 3L1Z-8620-AB
LABOR OPERATION CLAIMING CHART
Operation Labor Operation Application Time
041807A Replace The Front End Accessory Drive (FEAD) Belt 2004 F-150
2004 Expedition
2004 Navigator 0.3 Hr.
0.4 Hr.
0.4 Hr.
WARRANTY STATUS:
Eligible Under Provisions Of New Vehicle Limited Warranty Coverage
DEALER CODING
BASIC PART NO. CONDITION CODE
8620 42
--------------------------------------------------------------------------------
NOTE: The information in Technical Service Bulletins is intended for use by trained, professional technicians with the knowledge, tools, and equipment to do the job properly and safely. It informs these technicians of conditions that may occur on some vehicles, or provides information that could assist in proper vehicle service. The procedures should not be performed by "do-it-yourselfers". Do not assume that a condition described affects your car or truck. Contact a Ford, Lincoln, or Mercury dealership to determine whether the Bulletin applies to your vehicle. Warranty Policy and Extended Service Plan documentation determine Warranty and/or Extended Service Plan coverage unless stated otherwise in the TSB article. The information in this Technical Service Bulletin (TSB) was current at the time of printing. Ford Motor Company reserves the right to supercede this information with updates. The most recent information is available through Ford Motor Company's on-line technical resources.
Copyright © 2004 Ford Motor Company
Last edited by whitecrystal1; Jan 24, 2007 at 12:15 AM.
Senior Member
Joined: Jul 2006
Posts: 1,593
Likes: 0
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Here is some more info
Serpentine belts are a great invention but unfortunately they drive everything on a modern engine which places a lot of load on them. When your belt displays any of the following:
-squeals when accelerating.
-chirps constantly
-squeals constantly
-squeals when wet or moist outside
-squeals when cold
-or any combination of the above.
The belt must be replaced, but wait ... If you replace the belt it may stop for a while but then the noise comes back. This is because the old belt was slipping and has polished the pulleys or "glazed" them. So before you replace that noisy belt scrub all of the pulleys well with a scotch brite pad, or a good wire brush to remove the glaze and rough up the surface. Clean them off with brake cleaner afterward. Belts work by friction so if the surface is polished too much the belt will slip. If you have already put on a new belt and it is making noise, -sorry you must buy a new one again. Slipping on the pulleys will glaze a new belt fast which ruins it. Some people say you can apply brake cleaner etc to a new belt to fix it but that may not work well. If it slips it will just mess up your newly cleaned pulleys and you will have to scrub them up all over again. So do the job right and rough up the pulleys AND replace the belt at the same time.
There are a few other things that can cause serpentine belt noise tho so before you replace the belt check the following:
-The bearings in the tensioner and idler pulleys can go bad. To test this put some chalk or whiteout on the edge of those pulleys so it makes a bright "flash" you can see when it rotates. If the chirp is in time with the flash on one of the pulleys most likely you have a bad bearing in that pulley. Sometimes if you have the right tools you can press in a new bearing. Other times you need to get a new assembly. Other accessories can have bad bearings also so you may need to mark and watch them also. WARNING: Never stand in line with a moving belt or fan. If it comes apart etc it could cause severe injury.
-The tensioner can loose it's tension which will cause the belts to slip. If it is easy to move the tensioner then it needs to be replaced and the pulleys cleaned and belt replaced.
-The belt can become delaminated and part of the outer fabric cover can come loose which will "flap" when it hits parts of the engine making a noise. If you hear this tick tick tick noise and it seems to be in time with that printing on the belt then this may be the problem. Always install a serpentine belt so that the cover splice is pushed down by the motion of the belt rather than being peeled upward.
-The belt can crack or delaminate and sections of the inner VVVVV surface may break off and cause mysterious noises. If you see cracks in the inner surface replace the belt.
REMEMBER: NEVER PUT ANY LUBRICANT ON A BELT!!! A lubricant may stop the belt from making noise temporarily but it defeats the purpose of having a belt. You need FRICTION between the belt and pulleys to transfer power. If you lube a belt it changes the frequency of the sound the belt makes to one you can't hear but will not drive the pulleys fast enough and you may end up with a dead battery, dim lights, poor AC, or high engine temps, etc. The slippage and lubricants work together to produce heat in the belt which will destroy the belt rapidly.
Here is some more info
Serpentine belts are a great invention but unfortunately they drive everything on a modern engine which places a lot of load on them. When your belt displays any of the following:
-squeals when accelerating.
-chirps constantly
-squeals constantly
-squeals when wet or moist outside
-squeals when cold
-or any combination of the above.
The belt must be replaced, but wait ... If you replace the belt it may stop for a while but then the noise comes back. This is because the old belt was slipping and has polished the pulleys or "glazed" them. So before you replace that noisy belt scrub all of the pulleys well with a scotch brite pad, or a good wire brush to remove the glaze and rough up the surface. Clean them off with brake cleaner afterward. Belts work by friction so if the surface is polished too much the belt will slip. If you have already put on a new belt and it is making noise, -sorry you must buy a new one again. Slipping on the pulleys will glaze a new belt fast which ruins it. Some people say you can apply brake cleaner etc to a new belt to fix it but that may not work well. If it slips it will just mess up your newly cleaned pulleys and you will have to scrub them up all over again. So do the job right and rough up the pulleys AND replace the belt at the same time.
There are a few other things that can cause serpentine belt noise tho so before you replace the belt check the following:
-The bearings in the tensioner and idler pulleys can go bad. To test this put some chalk or whiteout on the edge of those pulleys so it makes a bright "flash" you can see when it rotates. If the chirp is in time with the flash on one of the pulleys most likely you have a bad bearing in that pulley. Sometimes if you have the right tools you can press in a new bearing. Other times you need to get a new assembly. Other accessories can have bad bearings also so you may need to mark and watch them also. WARNING: Never stand in line with a moving belt or fan. If it comes apart etc it could cause severe injury.
-The tensioner can loose it's tension which will cause the belts to slip. If it is easy to move the tensioner then it needs to be replaced and the pulleys cleaned and belt replaced.
-The belt can become delaminated and part of the outer fabric cover can come loose which will "flap" when it hits parts of the engine making a noise. If you hear this tick tick tick noise and it seems to be in time with that printing on the belt then this may be the problem. Always install a serpentine belt so that the cover splice is pushed down by the motion of the belt rather than being peeled upward.
-The belt can crack or delaminate and sections of the inner VVVVV surface may break off and cause mysterious noises. If you see cracks in the inner surface replace the belt.
REMEMBER: NEVER PUT ANY LUBRICANT ON A BELT!!! A lubricant may stop the belt from making noise temporarily but it defeats the purpose of having a belt. You need FRICTION between the belt and pulleys to transfer power. If you lube a belt it changes the frequency of the sound the belt makes to one you can't hear but will not drive the pulleys fast enough and you may end up with a dead battery, dim lights, poor AC, or high engine temps, etc. The slippage and lubricants work together to produce heat in the belt which will destroy the belt rapidly.
