Question about 2003 Subaru Forester

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I have a 2003 Subaru Forester 2.5 XS. Belt was squeaking, had both replaced (A/C and alt./power steering pump belts). Belts are tight but not overly so. An intense screech happens on startup which lasts five seconds. Belts only have 1.5K miles on them. What to do?

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  • thomas112749 Apr 23, 2010

    I did as you instructed. I sprayed the alternator pulley bearing with CRC, then started the engine. It gave a feeble squeak. I stopped the engine, then started it. No squeak or screech of any kind, on that second start or subsequent starts. I think you nailed it.
    I assume that I should eventually replace the alternator as I don't think I can have just a bearing replaced on it.
    Many thanks!



  • thomas112749 Apr 23, 2010

    It was indeed helpful. It stopped the screeching sound.

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Hi the noise you hear is more than likely going to be a dry pulley bearing this is the most likely cause of the noise you hear.
the most common of the lot is either the power steering pulley or the air con pulley.

The only real way of pinpointing the actual right pulley is to go out and buy some thin spray oil or lube, you need a spray that sprays out fine oil like an aerosol type of spray. Now what you need to do is start with on pulley and give it a good spray in the middle where the bearing is and if you can get to the back then give this a spray also, then start the engine and see if you still have the noise, keep doing this until the noise stops and then you will no witch pulley has a dry bearing.
Now on finding the dry bearing you have two options you can either replace the pulley or just give it a spray every time it gets noisy the spray lube will be enough to stop the noise without causing any damage just make sure you give it a good spray and it should be fine.

so go through each pulley one at a time do all the pulleys and tensioners basically everything the belts run on, eventually you will come across the pulley and the noise will stop for a month or two so its up to you then if you replace the pulley or just give it a good spray every now and again.

let me know how you get on or if you need further assistance ok

Posted on Apr 23, 2010

  • paul proctor Apr 24, 2010

    Hi glad it solved your problem, well at least the noise any way, you should be ok spraying it for a while but as its the alternator the only option would be to replace the alternator as the bearing is a sealed unit so would not be worth trying to change.
    At least now you know whats causing the noise and now you know its not the belt causing the problem.

    im glad i could help you sort out the noise, thanks for using fixya.


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