timing belt?
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Freshman User
Joined: Jul 2005
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timing belt?
the last couple days whenever I start up my truck(02 f150) I hear a squealing sound coming from the engine. when i open the hood it definitely sounds like its from the belt. when driving around whenever i hit the gas or the brake, the squealing speeds up or slow down accordingly. but after the first few minutes, the sound pretty much goes away all together and very rarely comes back until i turn off the truck and start it a few hours later.
im assuming its the timing belt. ive got about 50k miles on this belt but it doesnt look bad. i dont see any cracks and the grooves still appear to be there. other than replacing it, is there anything else i can do to get rid of the noise? would it be anything other than the belt?
thanks!
im assuming its the timing belt. ive got about 50k miles on this belt but it doesnt look bad. i dont see any cracks and the grooves still appear to be there. other than replacing it, is there anything else i can do to get rid of the noise? would it be anything other than the belt?
thanks!
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Freshman User
Joined: Jul 2005
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yea serpentine belt.
how do I check to see if its a pulley or a bearing? are there any things I should do?
i bought the truck used. and about 50k on the truck, it started to squeal. i put a new belt on and the squealing went away until now. and now im at 100k. maybe ive just had some crappy belts on but like yours i thought they lasted a lot longer.
how do I check to see if its a pulley or a bearing? are there any things I should do?
i bought the truck used. and about 50k on the truck, it started to squeal. i put a new belt on and the squealing went away until now. and now im at 100k. maybe ive just had some crappy belts on but like yours i thought they lasted a lot longer.
Senior User
Joined: Dec 2006
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From: Green Bay WI. / Wawa Ont.
Most guys use motorcraft, goodyear, or gates. I used a gates and I hope it will last. Otherwise when you have the belt off check the pulleys to see if they turn hard or wobble. Other than that I would go to a mechanic. I'm sure someone else will give you more ideas. 
Postmaster
Joined: May 2003
Posts: 3,310
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From: E.Lincoln County, NC
I'd agree the belt needs replacing. The tensioner could be weak too but most likely a belt that needs replacing due to the following hint you gave. To quote your post " but after the first few minutes, the sound pretty much goes away all together and very rarely comes back until i turn off the truck and start it a few hours later."Your battery may be contributing to the problem. If it's weak then your cranking the truck would drain power from it. The alternator will charge full on trying to replace the power you used cranking the truck thus possibly making the belt slip at the alternator pulley. Have your battery load tested where you pick up your belt, Advance, Auto Zone, etc.
Postmaster
Joined: Nov 2006
Posts: 4,517
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From: SE Wyoming
TO check your pulleys take the belt off the engine. Then turn all the accessory and tensioner pulleys by hand and try to wiggle them forward and backward. If they all seem to be tight and don't squeak you can turn the engine on and see if the crank is making the noise or if it happens to be internal.
I use a Goodyear Gatorback belt but they are a bit hard to find in stores. Auto Zone at one time had them.
I use a Goodyear Gatorback belt but they are a bit hard to find in stores. Auto Zone at one time had them.
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Freshman User
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well i put on a new belt but the squealing remains. the pulleys all seemed to be on pretty tight. maybe one of them doesnt have enough grip and needs to be replaced. the top idler pulley and the tensioner pulley both look pretty shiny and feel slick.
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Junior User
Joined: Mar 2007
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From: Ohio
Question, Is it a constant squeel/high pitched sound or a cyclic chirpping sound?
If constant it is more than likely a pulley/idler bearing going bad or it could be from a loose belt slipping past the pulleys due to a weak tensioner spring or a stretched belt.
If it is cyclic it is most likely due to dirt or rust in the grooves of the polly-V face of the belt.
If constant it is more than likely a pulley/idler bearing going bad or it could be from a loose belt slipping past the pulleys due to a weak tensioner spring or a stretched belt.
If it is cyclic it is most likely due to dirt or rust in the grooves of the polly-V face of the belt.
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Freshman User
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A/C compressor clutch..... common problem on these trucks. Easy to replace.
Also clean the pulley's.Green scrub pad,fine sand paper......
Question, Is it a constant squeel/high pitched sound or a cyclic chirpping sound?
im hearing it more regularly since i put the new belt on though. think im gonna try that green scrub pad idea.