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| Belt Chirp http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=5&t=79879 |
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| Author: | bronco9588 [ Sat Aug 16, 2014 12:33 am ] |
| Post subject: | Belt Chirp |
Hey Gents, I heard my wife drive in today and man that AC was making the serpentine howl! I took a look at the idler pulley and it is just bouncing around. I figure those bounces are causing the belt to chirp with increased torque load on the serpentine with AC in run. My plan is to replace the belt tensioner and belt and check free movement of all the auxiliaries. Just wondering if anybody ran into something like this? How do tensioners fail when they are a spring? |
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| Author: | Auberon [ Sat Aug 16, 2014 4:08 am ] |
| Post subject: | Re: Belt Chirp |
With respect, I'd suggest you check to OAD before you get too carried away with buying other parts. |
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| Author: | papaindigo [ Sat Aug 16, 2014 7:43 am ] |
| Post subject: | Re: Belt Chirp |
Replace alternator pulley or entire alternator. Bad alternator decoupler pulley causes that bounce and it can be worse with AC on. |
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| Author: | striperman36 [ Sat Aug 16, 2014 9:17 am ] |
| Post subject: | Re: Belt Chirp |
replace all the idlers and the tensioner if the belt is bouncing all that stuff is over stressed |
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| Author: | bronco9588 [ Sat Aug 16, 2014 2:25 pm ] |
| Post subject: | Re: Belt Chirp |
papaindigo wrote: Replace alternator pulley or entire alternator. Bad alternator decoupler pulley causes that bounce and it can be worse with AC on. That bad boy is expensive. I tried replacing the alternator pulley at 93K (Currently at 130K) and I just gave up. Getting the pulley off was a lot of work. The alternator was covered under warranty around 105K. Sadly the warranty is gone. I still have the pulley and will replace idler, belt, and tensioner as well. |
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| Author: | striperman36 [ Sat Aug 16, 2014 2:32 pm ] |
| Post subject: | Re: Belt Chirp |
I have a electric impact wrench from harbor freight, http://www.harborfreight.com/12-in-elec ... 68099.html, takes off and on the OAD in about 30 secs |
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| Author: | bronco9588 [ Thu Aug 21, 2014 12:40 am ] |
| Post subject: | Re: Belt Chirp |
Is OAD a fancy name for the alternator pulley? |
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| Author: | Auberon [ Thu Aug 21, 2014 7:02 am ] |
| Post subject: | Re: Belt Chirp |
It is indeed. The fancy name is Overrunning Alternator De-coupler. If you do need one, it's important to get a real one that's not a cheap knock off as in a friction clutch. There's a bit been written on here recently about that and the recent updates to designs by Litens. |
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