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1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

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  #1  
Old 04-02-2010, 12:05 PM
labmaster labmaster is offline
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Chirping noise

I have a 95 F150 with a 5.0. I have a strange chirping noise in the motor. I thought it was just the belt slipping. I replaced the belt, belt tensioner and then the water pump. The noise continued. Then I removed the belt and ran the motor. The noise was still there. This eliminated all the accessories. It sounds just like a belt chirp. It sounds like it's external, no knocking or heavy metal sound. Has anyone heard of a harmonic balancer making a noise like this? Any help would be appreciated.
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Old 04-02-2010, 12:33 PM
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Have a good look at the balencer , if the rubber is old & cracked or missing pecies it could be , make sure the bolts tight , if you think it sliped put a timing light on it & see ....Lew
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Old 04-02-2010, 12:42 PM
labmaster labmaster is offline
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The rubber looks good and it doesn't appear to have slipped, the factory puts a white paint mark across the two pieces and they're still line up. I would think if it slipped I would also be getting a bad vibration. I was thinking it wore out and it's metal rubbing causing the noise. I see a slight wobble when it's running, but very slight. I already spent a bunch of money on belts, tensioners and water pump and was hoping someone has also experienced this, before I throw more money at it. The truck runs great with only 150,000 miles. I just don't want to be left stranded.
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Old 04-02-2010, 02:41 PM
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I am in the same situation-and have just noticed that the Thermactor/air pump pulley has developed a wobble--and suspect that it is the source of this chirping noise.

But if you removed the drive belt-your problem couldnt be this-never mind. Does the noise go away when the clutch pedal is depressed ?-(if your truck is a manual)
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Old 04-02-2010, 06:06 PM
labmaster labmaster is offline
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It turned out to be the distributor. The bushing went bad. When I pulled it out and turned the shaft it was obvious. I just put a new one in and the noise is gone.
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Old 04-02-2010, 06:21 PM
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Quote:
Originally Posted by labmaster View Post
It turned out to be the distributor. The bushing went bad. When I pulled it out and turned the shaft it was obvious. I just put a new one in and the noise is gone.
New distributor or new bushing?? How many miles on the distributor?
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92 F150 XLT 4x4, SWB, 5.0 V8, 5sp ,123k on M1/Amsoil synthetic oil. Power everything. Trailering/Handling option(stabilizer bars front /rear and quad shocks).Factory skid plates,manual hubs, manual Tcase, Super Cooling. 4.09/4.10LS axles. 31'' BFG KO tires. 20.3 MPG @ 60 MPH.4350 lbs with full tank of gas!! 2150RPM@60MPH All options but 4!
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Old 04-03-2010, 12:34 AM
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ok subscribing to this cause mine is doing it and it goes up and down with rpms i'll check that bushing tomorrow
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Old 04-03-2010, 03:09 PM
labmaster labmaster is offline
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I had to replace the whole distributor. It was original 150,000 miles. When I took it out and turned the shaft by hand it made the noise. I narrowed it down by taking the belt off and running the motor, it still made the noise. Then I put a long screw driver handle to my ear and the other end down to the base of the distrubutor. I could hear the chirping through the screw driver. This is similar to using a tethoscope.
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Old 04-03-2010, 03:09 PM
labmaster labmaster is offline
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I had to replace the whole distributor. It was original 150,000 miles. When I took it out and turned the shaft by hand it made the noise. I narrowed it down by taking the belt off and running the motor, it still made the noise. Then I put a long screw driver, handle to my ear and the other end down to the base of the distrubutor. I could hear the chirping through the screw driver. This is similar to using a stethoscope.
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Old 04-03-2010, 04:26 PM
93coleman 93coleman is offline
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It is a bad cps synchronizer.Go to youtube and type in"bad cps synchronizer"and you can see a video of one chirping out of the motor.Apparently common on the 5.0.
EDIT-or bad distributor(labmaster)
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Old 04-03-2010, 04:26 PM
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54, 96, balancer, belt, chirping, engine, f150, ford, harmonic, noise, slightly, tight, truck, wobbles, wobbling

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