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  #1  
Old 12-24-2022, 10:35 AM
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Aluminum Pulleys

Im doing the m54 water pump replacement today on my 05 3.0i and temporarily reusing my old pulley for it. I ordered the rein aluminum pulley replacement for the water pump too.

Other than the potential for corrosion of the plastic pulleys, is there any benefit to running the aluminum one? And this one looks so pretty, are there other aluminum pulleys I can order? Like for the tensioner/idler

Thanks. It's 20 degrees in Austin and I gotta work on this shit today with like 4 layers and gloves. I couldn't get the tensioner to release yesterday but I think I didn't give it enough beans in the cold maybe.
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  #2  
Old 12-24-2022, 12:33 PM
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Ouch! Stay out of the wind. Out of the wind and in the sun is not too bad. The power pulley steering can be replaced. I don't know of an aluminum one. I also removed the plastic pulley for a metal one. It does take good force for the tensioner to release.
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Old 12-24-2022, 01:28 PM
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Yeah, I just the water pump off and I definitely need to do the idler and tensioner, both make noise now. But i gotta order parts for those.

And frequent trips inside to get warm
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Old 12-24-2022, 01:46 PM
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Do you need pulleys? I think I have one of each you if need some asap. Let me know. I can look through my spare parts box.
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Old 12-24-2022, 02:56 PM
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Thanks. I actually snapped one of the studs by not using a torque wrench. Iím gonna relax for a bit and then determine if I can get it off with vice grips or by cutting a slot. Monday Iíll have to go to the dealer and get four of the studs to replace all of them.

Unfortunately this is what I should expect for not using a torque wrench and thinking, hmm this is still loose. I think this is the second time Iíve snapped something.


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  #6  
Old 12-24-2022, 05:03 PM
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Ouch! I checked my spare parts box. I have two tensioner pulleys. Plus one off set idle pulley. Both are new on mine so I won’t need new ones for a long time. Good luck!
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  #7  
Old 12-24-2022, 06:39 PM
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Thanks again, Iím likely going FCP route for lifetime coverage. Itís barely making noise and slows quickly, but itís good enough for me to be comfortable for a month max.

There was enough thread left to vice grip the bolt and remove the broken part.

I went to Home Depot and bought M6 1.0 stainless steel machine screws but it seems they donít line up completely. They didnít have headless ones in metric. Theyíre so close, I was going to cut the head off of them and use them until I get my aluminum pulley next week. But they donít thread past an 1/8th of an inch, so Iím still going to have to wait until Monday to hit the dealership for the studs.

Hereís a pic if anyone could explain my misfortune of a christmas miracle lol.

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Old 12-24-2022, 07:10 PM
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Are the original stud threads m8x1. 5?
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  #9  
Old 12-24-2022, 07:30 PM
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Aluminum Pulleys

Iím not sure, at Home Depot the stud threaded what I mentioned. I found it on RealOEM, part 07129904544 which says M6X30. I didnít try 1.5, just 1.0. I donít know if there was a 1.5 thread tester at Home Depot, just 1.0

Also, would I need to cut the head off the bolt to have the threads reversed? Like the threads on the engine are reversed. So maybe the problem I had earlier is the thread direction.

Last edited by miloh; 12-24-2022 at 07:41 PM.
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  #10  
Old 12-24-2022, 09:09 PM
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Stay warm in all of this.

I've been driving my X5 in the Austin cold this weekend and getting "check coolant level", but don't have any spare BMW coolant until Tuesday when I can pick some up...
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