how much engine do I have to remove to replace the alternator - Chevy and GMC Duramax Diesel Forum
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Old 01-07-2012, 08:51 AM   eBay Motors  #1 (permalink)
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how much engine do I have to remove to replace the alternator

My alternator is squealing, and I looked at it this morning. It looks like I have to remove the fan shroud and part of the air intake just to get my ratchet into the hole on the tensioner to relieve the tension on the belt to remove the alternator. Any words of wisdom would be greatly appreciated
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Old 01-07-2012, 09:06 AM   eBay Motors  #2 (permalink)
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You can get a ratchet on it without taking anything off... Then just take the belt off, disconnect the batteries, and unplug the alternator and remove the two mounting bolts. Also I never took the intake off to do them, although if you have the time it might make things easier to see. Its a pretty easy job, did one on my buddies three times in one day, got it down to about a 5 minute job. What year truck is yours?
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Old 01-07-2012, 09:07 AM   eBay Motors  #3 (permalink)
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None. Stick your arm down there with a breaker bar and release the tension on the belt. Unbolt the Alternator, install new one, put belt back on. Done.
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Old 01-07-2012, 05:31 PM   eBay Motors  #4 (permalink)
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answer to my own question

So here is my experience today. I have a 2006 lly. It has a wonderful plastic cage around the back side of the fan. I know that it was put there to keep you out of the fan but really, if you are that stupid you deserve to be taken out of the gene pool. Any way I digress, so as I look down at the tensioner there is NO space to get a ratchet into the hole because one of the spokes from the cage is in that space. Unfortunately, I left my FEIN tool at a clients place so I had to use a hack saw blade and a dremel tool, but the aforementioned spoke is no longer in my way. With it removed I had NO problem accessing the belt tensioner. While I had to replace my alternator, I decided to replace the serpentine belt. You remember the cage the i mentioned I love so much, yeah it was again in the way to be able to remove the belt from the crank shaft pulley. Well that same cage is no longer a part of my truck. I peacefully cut each spoke from the outer ring and then snapped them from the inner ring. Then I cut the inner ring into two pieces and removed it from around the fan clutch. Wow know have a lot of space to access all of the pulleys. It was much easier to install the new belt, and much less cussing at the wonderful engineers who design our trucks with no regard to serviceability. I thing they should all have to perform every service item on the truck before they are allowed to work for any car company. IMHO Any way that was my experience with changing my alternator and serpentine belt. Thanks for the replies.
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Old 01-07-2012, 05:36 PM   eBay Motors  #5 (permalink)
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You think that's tight, look under the hood of a 6.4l ford
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Old 01-07-2012, 05:50 PM   eBay Motors  #6 (permalink)
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I would like to see a picture of what you are talking about. I can easily fit a big ratchet onto my tensioner, and have done my fair share of serpentine belts on these. Im just curious what the cage looks like, obviously none I have messed with have had this cage. Just curious is all. Glad you got er done man.
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Old 01-07-2012, 06:11 PM   eBay Motors  #7 (permalink)
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Quote:
Originally Posted by biketopia View Post
You think that's tight, look under the hood of a 6.4l ford
Hahahaha^

OP: I think your making this way harder than it actuator is. It only takes an hour tops to change and alternator

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