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Old 01-06-2013, 10:30 PM
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Location: Claremont California
 
Join Date: Mar 2010
Posts: 1,465
Mein Auto: 2005 545i
Quote:
Originally Posted by bimmerfan52 View Post
Yeah putting the AC belt on without the tool got the better of me. I bought a cheaper tool to install stretch belts but it wasn't the same design and there wasn't room for it to fit past the bracket that supports AC lines. I needed the car quickly so I threw in the towel and brought it to my mechanic. 5 minutes later (no charge) I was in business.

Agree with other posters that it is important to visually check to make sure the alternator pulley is perfectly aligned with the other pulleys (a long straight edge such as a level works well). If the alternator is not seated against the alternator bracket squarely (yes the dreaded alternator bracket with the profile gasket underneath that likes to leak and requires raising the engine off its mount to remove the last bolt) the pulley will also be out of alignment and stress the belt. Also the wrong pulley or a cocked pulley can cause the same thing. Examine both edges of the broken belt for wear to see if the belt was being pushed out of alignment.

Other possibility could be belt tension if you removed and reinstalled the tensioner. If you just took the tension off of it while uninstalling and installing the belt then it shouldn't have changed.

I carry my old belts in the trunk as backups for the road. I don't carry all of the tools necessary to install it myself but at least I can hand the backup belt to a mechanic to install instead of waiting to obtain a belt to get back on the road. If you didn't keep the old belt you may want to buy two so you have a spare. If the reason the belt broke is not that it was defective and you can't discover another reason, the next belt probably won't last much longer than the last one and you need to be ready to replace it on the road. I would also carry the proper torx bit, breaker bar and 3/16" drill bit for a couple of months in your trunk so you can install a replacement yourself on the road until you are sure you are "out of the woods" so to speak.
i didnt remove the tensioner ijust locked it over and stuck a small screw driver in the hole to hold it... i did take a good look at the belt alignment and all looked good..the alt was nice and tight to the braket.. the belt didnt break it actually shreaded to pieces.. which made me think it was bad...i did keep the old belt and having the tools to repair.. in the trunk is good advice and will keep in the trunk at all times..from now on.... the problem was that it damaged a coolant hose and and lost coolant so was S.O.L..
Iwas do for a coolant flush and was goen to replace all my coolant hoses any ways. so im gonna take iit to my mechanic and change the pwr steering and break fluids. and let him change all my pulleys and put the belts on and b done with it, cause of work i cant wrench on it till the wekend. and i want my baby fix like right now..
So Bimmerfan thanks for the reply and the good advice
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