Stripped threads in Alternator for Idler Pulley

TexTide · 12-31-2015, 09:12 AM

So I messed up and way over torqued the Idler pulley on my 08 328i.

I don't really want to have to replace an otherwise perfectly good alternator, but I'm not sure if the pulley will run correctly with a helicoil.

What would you guys recommend here?

Efthreeoh · 01-02-2016, 07:36 AM

Helicoil

TexTide · 01-02-2016, 12:26 PM

I'll try to get that done. Would loctite be any help otherwise?

Efthreeoh · 01-02-2016, 07:41 PM

So if the threads are damaged, it means to cross-threaded the bolt when you installed the pulley. Over torqueing the bolt would have snapped it off and not damaged the threads in the alternator. Good news is the alternator can be removed and a helicoil installed on the bench rather than in the car.

The helicoil will hold just fine.

anujkch@gmail.com · 06-08-2020, 12:35 AM

Hi Team, I have the same issue. Can you kindly tell me which Helicoil kit do I need to use? Thanks.

Efthreeoh · 06-09-2020, 01:43 PM

Quote:

Originally Posted by anujkch@gmail.com

Hi Team, I have the same issue. Can you kindly tell me which Helicoil kit do I need to use? Thanks.

Just look up the thread size for the bolt in realeom.com, then go to helicoil and get the correct thread kit. Easy.

12-31-2015, 09:12 AM	#1
TexTide New Member 7 Rep 24 Posts Drives: 2008 e90 328i Sedan Join Date: Dec 2015 Location: Texas iTrader: (0)	Stripped threads in Alternator for Idler Pulley So I messed up and way over torqued the Idler pulley on my 08 328i. I don't really want to have to replace an otherwise perfectly good alternator, but I'm not sure if the pulley will run correctly with a helicoil. What would you guys recommend here?
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01-02-2016, 07:36 AM	#2
Efthreeoh General 17300 Rep 18,726 Posts Drives: The E90 + Z4 Coupe & Z3 R'ster Join Date: May 2012 Location: Virginia iTrader: (0)	Helicoil __________________ A manual transmission can be set to "comfort", "sport", and "track" modes simply by the technique and speed at which you shift it; it doesn't need "modes", modes are for manumatics that try to behave like a real 3-pedal manual transmission. If you can money-shift it, it's a manual transmission. "Yeah, but NO ONE puts an automatic trans shift knob on a manual transmission."
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01-02-2016, 12:26 PM	#3
TexTide New Member 7 Rep 24 Posts Drives: 2008 e90 328i Sedan Join Date: Dec 2015 Location: Texas iTrader: (0)	I'll try to get that done. Would loctite be any help otherwise?
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01-02-2016, 07:41 PM	#4
Efthreeoh General 17300 Rep 18,726 Posts Drives: The E90 + Z4 Coupe & Z3 R'ster Join Date: May 2012 Location: Virginia iTrader: (0)	So if the threads are damaged, it means to cross-threaded the bolt when you installed the pulley. Over torqueing the bolt would have snapped it off and not damaged the threads in the alternator. Good news is the alternator can be removed and a helicoil installed on the bench rather than in the car. The helicoil will hold just fine. __________________ A manual transmission can be set to "comfort", "sport", and "track" modes simply by the technique and speed at which you shift it; it doesn't need "modes", modes are for manumatics that try to behave like a real 3-pedal manual transmission. If you can money-shift it, it's a manual transmission. "Yeah, but NO ONE puts an automatic trans shift knob on a manual transmission."
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06-08-2020, 12:35 AM	#5
anujkch@gmail.com Registered 0 Rep 2 Posts Drives: BMW 328i Join Date: Jun 2020 Location: USA iTrader: (0)	Hi Team, I have the same issue. Can you kindly tell me which Helicoil kit do I need to use? Thanks.
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