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Brand New Belt chirping / squealing ???
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10-04-2017, 09:17 AM | #1 |
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Brand New Belt chirping / squealing ???
So, I recently started this thread after my harmonic balancer failed:
http://www.e90post.com/forums/showthread.php?t=1425970. I put on the new accessory belt that I bought from ECS, but I re-used the AC belt Although the repair was successful, I noticed that the belt (pretty sure it's the accessory belt is squeaking). On start up, there is a noticeable chirp that's less than a second. But from time to time, the belts will audibly squeal for a couple of seconds, and then goes away. It's not all the time though. In my research, it appears that ECS gave me the belt Contitech 6K X 2065. Looking at the BMW OEM number, the belt should be a Contitech 6K X 2063. Can someone shed some light on this? Thoughts? |
10-04-2017, 09:49 AM | #2 |
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I don't think the 2065mm belt is your problem. Not sure why there is a discrepancy, but the tensioner will take out the small amount of slack. I'm using the 2065mm belt and haven't heard a peep from it.
On the other hand, you say you re-used the A/C belt. It's a known issue that the original 830mm belt would occasionally squeal and BMW recommended that the belt be replaced with an 824mm. But if that old belt wasn't squealing before, why would it start now? My first thought is that your A/C belt may not be properly seated on the A/C compressor pulley. When I installed mine, it had a tendency to slip toward the front by one groove. I had to take the belt off, line it back up, and when turning the crank use my other hand to push the belt toward the engine block to prevent it from slipping out. If you're certain that the belt is properly seated in all six grooves, then I would say that you need to try putting the 824mm belt on. |
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10-04-2017, 11:07 AM | #4 | |
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10-04-2017, 02:01 PM | #6 |
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10-04-2017, 02:02 PM | #7 | |
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10-04-2017, 05:05 PM | #8 |
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10-04-2017, 05:06 PM | #9 |
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10-05-2017, 10:05 AM | #10 |
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10-25-2017, 04:07 PM | #11 |
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Just a follow up to this:
I bought the official BMW install v-belt installation tool (part # 110330), similar to this listing: https://www.ebay.com/itm/BMW-V-Belt-...603096?vxp=mtr It makes installing the 824mm AC belt SO MUCH EASIER than the Lisle 59370 stretch belt tool. I still used the Lisle tool to remove the AC belt, as the official BMW tool is only meant for installation. |
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